The pathways to achieving carbon neutrality at the city level are diverse due to varying energy supply and demand conditions.Shanghai faces obstacles such as limited land resources,high costs of renewable energy techn...The pathways to achieving carbon neutrality at the city level are diverse due to varying energy supply and demand conditions.Shanghai faces obstacles such as limited land resources,high costs of renewable energy technologies,and instability of renewable energy.These challenges hinder the city’s efforts to achieve carbon peak and carbon neutrality(dual carbon).Therefore,Shanghai must identify and optimize its development path for renewable energy under the dual carbon goal.We employed the Low Emissions Analysis Platform Shanghai(LEAP-SH)model to simulate the impact of policies,such as industrial upgrading,energy efficiency improvement,energy structure optimization,increased technical innovation on energy,and ecological restoration,on the carbon emission pathways from 2022 to 2060 using five different scenarios.Our results indicate that Shanghai has the potential to achieve carbon neutrality in 2059 by promoting carbon reduction,pollution control,and green expansion.Moreover,we determined that the manufacturing industry;power generation industry;and transportation,storage,and mail services are the three major sectors for emission reduction under the dual carbon goal.Furthermore,the capacity and output of coal-fired power plants will be gradually replaced by offshore wind power in the dual carbon pathway.Finally,this study proposes countermeasures and suggestions for Shanghai to attain the dual carbon goal and high-quality development.展开更多
Driven by the strategic goal of“dual carbon,”the electric power industry is entering a critical period of transformation and upgrading,and there is a growing demand for composite and applied talents who are both pro...Driven by the strategic goal of“dual carbon,”the electric power industry is entering a critical period of transformation and upgrading,and there is a growing demand for composite and applied talents who are both proficient in professional technology and good at management.Taking the electrical engineering and automation major of Liupanshui Normal University as an example,this study addresses existing challenges in current talent cultivation practices.By emphasizing the deep integration of theory and practice and aligning closely with industry needs,the study aims to ensure that the talent cultivation system is both forward-looking and practical.Focusing on key aspects such as the practical teaching system,practice platforms,teaching content,instructional methods,assessment and evaluation strategies,and resource optimization,a series of targeted measures are proposed.These measures aim to construct a comprehensive,multi-dimensional practice education system that enhances students’practical innovation abilities and overall competencies.This approach not only improves the quality of talent cultivation but also serves as a valuable reference for the development of electrical engineering education in similar local colleges and universities.展开更多
With the increasingly severe global climate change problem,the“dual carbon”goals(peak carbon emissions and carbon neutrality)have become a common focus of international attention.The report of the 20th National Cong...With the increasingly severe global climate change problem,the“dual carbon”goals(peak carbon emissions and carbon neutrality)have become a common focus of international attention.The report of the 20th National Congress of the Communist Party of China clearly emphasizes the need to accelerate the green transformation of development models,implement comprehensive strategies for frugal development,support the growth of green and low-carbon industries,and promote the concept of green consumption.At the same time,“Made in China 2025”also elaborates on the strategic concept of innovation-driven and green development centered,and strives for breakthroughs in key industries such as new energy vehicles.In such a macro environment,adopting green innovation measures by enterprises not only contributes to ecological protection but also has an undeniable impact on their economic performance and overall value.This article takes BYD Group as a case study to explore in detail the positive effects of green innovation on its economic performance.We first systematically organized and analyzed BYD’s specific practices in green innovation;Then,by examining three key financial indicators,BYD’s current financial situation was analyzed in depth;On this basis,combined with research data,the positive impact of green innovation on BYD’s financial performance was revealed;Finally,based on the analysis results,relevant suggestions are proposed to provide reference for the sustainable development of enterprises in the context of“dual carbon.”展开更多
Against the backdrop of global climate change and China’s“dual carbon”goals,the green transformation of the construction industry is imperative,and completing the transformation requires many dual carbon talents to...Against the backdrop of global climate change and China’s“dual carbon”goals,the green transformation of the construction industry is imperative,and completing the transformation requires many dual carbon talents to support it.This article focuses on the construction engineering technology major in higher vocational education.It explores in depth the specific requirements for construction engineering technology talents in terms of professional knowledge,vocational skills,and literacy under the dual carbon mode.Based on this,corresponding dual carbon talent training courses are proposed,aiming to provide theoretical support and practical guidance for cultivating high-quality dual carbon talents that meet the needs of the new era.展开更多
The"Dual Carbon"Goal is one of the critical strategic tasks in China's new stage of development,and fiscal and tax policies play an essential role in promoting the"dual carbon target"process.Cu...The"Dual Carbon"Goal is one of the critical strategic tasks in China's new stage of development,and fiscal and tax policies play an essential role in promoting the"dual carbon target"process.Currently,China's fiscal and taxation policies to encourage the realization of the"dual carbon"target are faced with problems such as the lack of budgetary and tax regulation means and the lack of investment in the energy conservation industry.Throughout the mature experience of Britain,the United States,Japan,and other countries,although different,they all chose to levy carbon tax and tax incentives as the path to promote energy transformation.To further encourage energy conversion,China can choose to establish a carbon tax mechanism and promote and improve low-carbon preferential policies and other diversified fiscal and tax policies.展开更多
Lithium-ion capacitors(LICs) of achieving high power and energy density have garnered significant attention. However, the kinetics unbalance between anode and cathode can impede the application of LICs. Vanadium nitri...Lithium-ion capacitors(LICs) of achieving high power and energy density have garnered significant attention. However, the kinetics unbalance between anode and cathode can impede the application of LICs. Vanadium nitride(VN) with a high theoretical specific capacity(~ 1200 m Ah·g^(-1)) is a better pseudocapacitive anode to match the response of cathode in LICs. However, the insertion/extraction of Li-ions in VN's operation results in significant volume expansion. Herein, the VN/N-r GO-5composite that three-dimentional(3D) dicyandiamidederived-carbon(DDC) tightly wrapped VN quantum dots(VN QDTs) on two-dimentional(2D) reduced graphene oxid(r GO) was prepared by a facile strategy. The VN QDTs can reduce ion diffusion length and improve charge transfer kinetics. The 2D r GO as a template provides support for nanoparticle dispersion and improves electrical conductivity. The 3D DDC tightly encapsulated with VN QDTs mitigates agglomeration of VN particles as well as volume expansion. Correspondingly, the LICs with VN/Nr GO-5 composite as anode and activated carbon(AC) as cathode were fabricated, which exhibits a high energy density and power density. Such strategy provides a perspective for improving the electrochemical properties of LIC anode materials by suppressing volume expansion and enhancing conductivity.展开更多
In responding to the“dual carbon”strategy,intelligent networked new energy vehicle technology plays a crucial role.This type of vehicle combines the advantages of new energy technology and intelligent network techno...In responding to the“dual carbon”strategy,intelligent networked new energy vehicle technology plays a crucial role.This type of vehicle combines the advantages of new energy technology and intelligent network technology,effectively reduces carbon emissions in the transportation sector,improves energy utilization efficiency,and contributes to the green transportation system through intelligent transportation management and collaborative work between vehicles,making significant contributions.This article aims to explore the development of intelligent network-connected new energy vehicle technology and applications under the dual-carbon strategy and lay the foundation for the future development direction of the automotive industry.展开更多
Using the same materials for the cathode and anode in energy storage devices could greatly simplify the technological process and reduce the device cost significantly.In this paper,we assemble a dual carbon-based Li-i...Using the same materials for the cathode and anode in energy storage devices could greatly simplify the technological process and reduce the device cost significantly.In this paper,we assemble a dual carbon-based Li-ion capacitor with the active materials derived entirely from a single precursor,petroleum coke.For the anode,petroleum cokederived carbon(PCC)is prepared by simple ball milling and carbonization,having a massive tap density(1.80 g cm^(-3))and high electrical conductivity(11.5 S cm^(-1)).For the cathode,the raw petroleum coke is activated by KOH(petroleum cokeactivated carbon(PC-AC)sample)to achieve a well-developed pore structure to meet a rapid capacitive behavior.As a result,in addition to the robust structural stability of both the anode and cathode,the assembled dual carbon Li-ion capacitor shows a high energy density(231 W h kg^(-1)/206 W h L^(-1))and ultralong cycling life(up to 3000/10,000 cycles)at a wide voltage window.The excellent electrochemical response and simple production process make the PCC materials have great potential for practical application.展开更多
Carbon peaking and carbon neutrality constitute an extensive,profound and systemic economic and social change.It is worthwhile to explore how fiscal policy,as a key institutional arrangement in the public policy syste...Carbon peaking and carbon neutrality constitute an extensive,profound and systemic economic and social change.It is worthwhile to explore how fiscal policy,as a key institutional arrangement in the public policy system to cope with climate change,can play a fundamental and pillar role.Based on literatures,theories and empirical materials,this paper systematically explores the relationship between climate change and public finance.The fiscal impact of climate change will eventually be reflected in fiscal behavior,fiscal costs and fiscal relations,and the fiscal system has the adaptability of an"automatic stabilizer"and the proactiveness to enable the Discretionary Approaches function when facing climate change impacts.This implies such a governance logic of fiscal policy that is systematic,forward-looking and flexible in addressing climate change.In the future,it is necessary to further incorporate climate change or related environmental factors into the fiscal policy framework,target the two key aspects of mitigation and adaptation,and carry out a holistic,systematic and forward-looking reform of the existing fiscal expenditure policy,fiscal revenue policy,fiscal investment and financing policy,government budget system,government procurement policy and ecological compensation policy.While highlighting the"governance"function of fiscal policy in addressing climate change,Chinese government needs to strengthen the coordination and collaboration between fiscal policy tools and other public policies,and magnify the governance effectiveness of fiscal policy in the process of addressing climate change.This paper helps understand the positioning,role and influence of fiscal policy in the process of addressing climate change,provides a basis for better playing the fundamental and underpinning role of the modern fiscal system in the governance of ecological civilization,and presents an analytical framework for building a theoretical system of ecological fiscal governance.展开更多
At the intersection of the“dual carbon”goal and the era of digital intelligence(DI),exploring the synergy between pollution and carbon reduction(SPCR)within the context of DI is important for promoting a comprehensi...At the intersection of the“dual carbon”goal and the era of digital intelligence(DI),exploring the synergy between pollution and carbon reduction(SPCR)within the context of DI is important for promoting a comprehensive green transformation of economic and social development.This study,based on urban panel data from 281 prefecture-level cities in China' Mainland from 2010 to 2020,developed a DI indicator system for these cities and employed a double machine learning algorithm for the first time to investigate the intrinsic mechanisms and incentivizing effects of DI on SPCR.The results showed that:①DI significantly promotes SPCR.②Mechanism tests demonstrated that DI can indirectly enhance SPCR by optimizing resource allocation and reinforcing government interventions.③Further analysis showed that the impact of DI on SPCR was more substantial in regions with lower levels of economic and environmental competition.Moreover,the SPCR driven by DI exhibited heterogeneity,characterized by stronger effects in“resource-based cities>non resource-based cities”and“non-capital economic zones>capital economic zones”.The conclusions of this study hold significant implications for fully harnessing the synergy between digitization and intelligence to empower SPCR.In addition,the findings are valuable for the government’s integrated promotion of the“dual carbon”goal and the“digital China”strategy.展开更多
We develop a dual porous （DP） TiO2 film for the electron transporting layer （ETL） in carbon cathode based perovskite solar cells （C-PSCs）. The DP TiO2 film was synthesized via a facile PS-templated method with t...We develop a dual porous （DP） TiO2 film for the electron transporting layer （ETL） in carbon cathode based perovskite solar cells （C-PSCs）. The DP TiO2 film was synthesized via a facile PS-templated method with the thickness being controlled by the spin-coating speed. It was found that there is an optimum DP TiO2 film thickness for achieving an effective ETL, a suitable perovskite]TiO2 interface, an efficient light harvester and thus a high performance C-PSC. In particular, such a DP TiO2 film can act as a scaffold for complete-filling of the pores with perovskite and for forming high-quality perovskite crystals that are seamlessly interfaced with Ti02 to enhance interracial charge injection. Leveraging the unique advantages of DP TiO2 ETL, together with a dense-packed and pinhole-free TiO2 compact layer, PCE of the C-PSCs has reached 9.81% with good stability.展开更多
The estimation of fractures is key to evaluating fractured carbonate reservoirs. It is difficult to evaluate this kind of reservoir because of its heterogeneously distributed fractures and anisotropy, A three-dimensio...The estimation of fractures is key to evaluating fractured carbonate reservoirs. It is difficult to evaluate this kind of reservoir because of its heterogeneously distributed fractures and anisotropy, A three-dimensional numerical model was used to simulate the responses of the dual laterolog （DLL） in a fractured formation based on a macro-isotropic anisotropic model, Accordingly, a fast fracture computing method was developed. First, the apparent conductivity of the DLL is linearly related to the porosity of the fracture and the conductivity of pore fluid. Second, the amplitude difference of the deep and shallow apparent resistivity logs is mainly dependent on the dip angle of the fracture. Then the response of the DLL to a formation with dip angle fractures is approximately depicted as a function of the bulk resistivity of the rock, the porosity of the fractures and the conductivity of fracture fluid. This function can be used to compute the porosity of fracture quickly. The actual data show that the fracture parameters determined by the DLL closely coincide with the formation micro imager log.展开更多
We demonstrated a simple and effective dual-templating approach for the synthesis of hierarchically mesocellular carbon foams by using nonionic surfactant of sorbitan monooleate and silica colloid particles as sacrifi...We demonstrated a simple and effective dual-templating approach for the synthesis of hierarchically mesocellular carbon foams by using nonionic surfactant of sorbitan monooleate and silica colloid particles as sacrificial templates, and resorcinol/ formaldehyde as carbon source. The representative carbon foam has dual mesopore sizes of 4 and 10 nm, and possesses the specific surface area of 580 m^2/g and the total pore volume of 0.80 cm^3/g.展开更多
In dual-ion batteries (DIBs), energy storage is achieved by intercalation/de-intercalation of both cations and anions. Due to the mismatch between ion diameter and layer space of active materials, however, volume expa...In dual-ion batteries (DIBs), energy storage is achieved by intercalation/de-intercalation of both cations and anions. Due to the mismatch between ion diameter and layer space of active materials, however, volume expansion and exfoliation always occur for electrode materials. Herein, an integrated electrode Co3O4/carbon fiber paper (CFP) is prepared as the anode of DIB. As the Co3O4 nanosheets grow on CFP substrate vertically, it promotes the immersion of electrolyte and shortens the pathway for ionic transport. Besides, the strong interaction between Co3O4 and CFP substrate reduces the possibility of sheet exfoliation. An integrated-electrode-based DIB is therefore packaged using Co3O4/CFP as anode and graphite as cathode. As a result, a high energy density of 72 Wh/kg is achieved at a power density of 150 W/kg. The design of integrated electrode provides a new route for the development of high-performance DIBs.展开更多
Lithium-ion hybrid supercapacitors(Li-HSCs) and dual-ion batteries(DIBs) are two types of energy storage devices that have attracted extensive research interest in recent years. Li-HSCs and DIBs have similarities in d...Lithium-ion hybrid supercapacitors(Li-HSCs) and dual-ion batteries(DIBs) are two types of energy storage devices that have attracted extensive research interest in recent years. Li-HSCs and DIBs have similarities in device structure, tendency for ion migration, and energy storage mechanisms at the negative electrode. However, these devices have differences in energy storage mechanisms and working potentials at the positive electrode. Here, we first realize the integration of a Li-HSC and a DIB to form a dual-ion hybrid supercapacitor(DIHSC), by employing mesocarbon microbead(MCMB)-based porous graphitic carbon(PGC) with a partially graphitized structure and porous structure as a positive electrode material. The MCMB-PGC-based DIHSC exhibits a novel dual-ion battery-capacitor hybrid mechanism: it exhibits excellent electronic double-layer capacitor(EDLC) behavior like a Li-HSC in the low-middle wide potential range and anion intercalation/de-intercalation behavior like a DIB in the high-potential range. Two types of mechanisms are observed in the electrochemical characterization process, and the energy density of the new DIHSC is significantly increased.展开更多
A novel carbon foam with microporous structure(CFMS),with the advantages of a simple fabrication process,low energy consumption,large specific surface area and high conductivity,has been prepared by a facile one-step ...A novel carbon foam with microporous structure(CFMS),with the advantages of a simple fabrication process,low energy consumption,large specific surface area and high conductivity,has been prepared by a facile one-step carbonization.In addition,the carbon foam possesses suitable interlayer spacing in short range which is flexible to accommodate the deformation of carbon layer caused by the ion insertion and deinsertion at the charge and discharge state.Furthermore,a low cost carbon-based symmetric potassium dual-ion capacitor(PDIC),which integrates the virtues of potassium ion capacitors and dual-ion batteries,is successfully established with CFMS as both the battery-type cathode and the capacitor-type anode.PDIC displays a superior rate performance,an ultra-long cycle life(90%retention after 10000 cycles),and a high power density of 7800 W kg^-1 at an energy density of 39Whkg^-1.The PDIC also exhibits excellent ultrafast charge and slow discharge properties,with a full charge in just 60 s and a discharge time of more than 3000 s.展开更多
基金supported by the National Social Science Fund of China[Grant No.21FJYB058].
文摘The pathways to achieving carbon neutrality at the city level are diverse due to varying energy supply and demand conditions.Shanghai faces obstacles such as limited land resources,high costs of renewable energy technologies,and instability of renewable energy.These challenges hinder the city’s efforts to achieve carbon peak and carbon neutrality(dual carbon).Therefore,Shanghai must identify and optimize its development path for renewable energy under the dual carbon goal.We employed the Low Emissions Analysis Platform Shanghai(LEAP-SH)model to simulate the impact of policies,such as industrial upgrading,energy efficiency improvement,energy structure optimization,increased technical innovation on energy,and ecological restoration,on the carbon emission pathways from 2022 to 2060 using five different scenarios.Our results indicate that Shanghai has the potential to achieve carbon neutrality in 2059 by promoting carbon reduction,pollution control,and green expansion.Moreover,we determined that the manufacturing industry;power generation industry;and transportation,storage,and mail services are the three major sectors for emission reduction under the dual carbon goal.Furthermore,the capacity and output of coal-fired power plants will be gradually replaced by offshore wind power in the dual carbon pathway.Finally,this study proposes countermeasures and suggestions for Shanghai to attain the dual carbon goal and high-quality development.
基金The Teaching Content and Curriculum System Reform Project of Guizhou Province(2023303,2024331,2024334)The Guizhou Province First-Class Undergraduate Major Construction Project under Grant(GZSylzy202104)+2 种基金The Construction Project of First-Class Discipline of Liupanshui Normal University under Grant(LPSSYylzy2007)The Discipline Team of Liupanshui Normal University(LPSSY2023XKTD11)The First-Class Undergraduate Course Training Project of Liupanshui Normal University(2023-03-027,2024-03-04)。
文摘Driven by the strategic goal of“dual carbon,”the electric power industry is entering a critical period of transformation and upgrading,and there is a growing demand for composite and applied talents who are both proficient in professional technology and good at management.Taking the electrical engineering and automation major of Liupanshui Normal University as an example,this study addresses existing challenges in current talent cultivation practices.By emphasizing the deep integration of theory and practice and aligning closely with industry needs,the study aims to ensure that the talent cultivation system is both forward-looking and practical.Focusing on key aspects such as the practical teaching system,practice platforms,teaching content,instructional methods,assessment and evaluation strategies,and resource optimization,a series of targeted measures are proposed.These measures aim to construct a comprehensive,multi-dimensional practice education system that enhances students’practical innovation abilities and overall competencies.This approach not only improves the quality of talent cultivation but also serves as a valuable reference for the development of electrical engineering education in similar local colleges and universities.
基金Interim Achievements of the 2023 Internationalization Special Projects 2023ZX13 and 2023ZX14 of Zhejiang Financial College。
文摘With the increasingly severe global climate change problem,the“dual carbon”goals(peak carbon emissions and carbon neutrality)have become a common focus of international attention.The report of the 20th National Congress of the Communist Party of China clearly emphasizes the need to accelerate the green transformation of development models,implement comprehensive strategies for frugal development,support the growth of green and low-carbon industries,and promote the concept of green consumption.At the same time,“Made in China 2025”also elaborates on the strategic concept of innovation-driven and green development centered,and strives for breakthroughs in key industries such as new energy vehicles.In such a macro environment,adopting green innovation measures by enterprises not only contributes to ecological protection but also has an undeniable impact on their economic performance and overall value.This article takes BYD Group as a case study to explore in detail the positive effects of green innovation on its economic performance.We first systematically organized and analyzed BYD’s specific practices in green innovation;Then,by examining three key financial indicators,BYD’s current financial situation was analyzed in depth;On this basis,combined with research data,the positive impact of green innovation on BYD’s financial performance was revealed;Finally,based on the analysis results,relevant suggestions are proposed to provide reference for the sustainable development of enterprises in the context of“dual carbon.”
基金Reform and Practice of Talent Training Mode for Construction Engineering Technology Majors Serving the National Dual Carbon Strategy(Project No.Z233314)。
文摘Against the backdrop of global climate change and China’s“dual carbon”goals,the green transformation of the construction industry is imperative,and completing the transformation requires many dual carbon talents to support it.This article focuses on the construction engineering technology major in higher vocational education.It explores in depth the specific requirements for construction engineering technology talents in terms of professional knowledge,vocational skills,and literacy under the dual carbon mode.Based on this,corresponding dual carbon talent training courses are proposed,aiming to provide theoretical support and practical guidance for cultivating high-quality dual carbon talents that meet the needs of the new era.
文摘The"Dual Carbon"Goal is one of the critical strategic tasks in China's new stage of development,and fiscal and tax policies play an essential role in promoting the"dual carbon target"process.Currently,China's fiscal and taxation policies to encourage the realization of the"dual carbon"target are faced with problems such as the lack of budgetary and tax regulation means and the lack of investment in the energy conservation industry.Throughout the mature experience of Britain,the United States,Japan,and other countries,although different,they all chose to levy carbon tax and tax incentives as the path to promote energy transformation.To further encourage energy conversion,China can choose to establish a carbon tax mechanism and promote and improve low-carbon preferential policies and other diversified fiscal and tax policies.
基金financially supported by the National Natural Science Foundation of China (Nos.22005167 and 21905152)Shandong Provincial Natural Science Foundation of China (Nos.ZR2020QB125, ZR2020MB045 and ZR2022QE003)+2 种基金China Postdoctoral Science Foundation (Nos.2021M693256, 2021T140687 and 2022M713249)Qingdao Postdoctoral Applied Research Project, Taishan Scholar Project of Shandong Province of China (No.tsqn202211160)the Youth Innovation Team Project for Talent Introduction and Cultivation in Universities of Shandong Province。
文摘Lithium-ion capacitors(LICs) of achieving high power and energy density have garnered significant attention. However, the kinetics unbalance between anode and cathode can impede the application of LICs. Vanadium nitride(VN) with a high theoretical specific capacity(~ 1200 m Ah·g^(-1)) is a better pseudocapacitive anode to match the response of cathode in LICs. However, the insertion/extraction of Li-ions in VN's operation results in significant volume expansion. Herein, the VN/N-r GO-5composite that three-dimentional(3D) dicyandiamidederived-carbon(DDC) tightly wrapped VN quantum dots(VN QDTs) on two-dimentional(2D) reduced graphene oxid(r GO) was prepared by a facile strategy. The VN QDTs can reduce ion diffusion length and improve charge transfer kinetics. The 2D r GO as a template provides support for nanoparticle dispersion and improves electrical conductivity. The 3D DDC tightly encapsulated with VN QDTs mitigates agglomeration of VN particles as well as volume expansion. Correspondingly, the LICs with VN/Nr GO-5 composite as anode and activated carbon(AC) as cathode were fabricated, which exhibits a high energy density and power density. Such strategy provides a perspective for improving the electrochemical properties of LIC anode materials by suppressing volume expansion and enhancing conductivity.
文摘In responding to the“dual carbon”strategy,intelligent networked new energy vehicle technology plays a crucial role.This type of vehicle combines the advantages of new energy technology and intelligent network technology,effectively reduces carbon emissions in the transportation sector,improves energy utilization efficiency,and contributes to the green transportation system through intelligent transportation management and collaborative work between vehicles,making significant contributions.This article aims to explore the development of intelligent network-connected new energy vehicle technology and applications under the dual-carbon strategy and lay the foundation for the future development direction of the automotive industry.
基金financially supported by the Natural Science Foundation of Shandong Province(ZR2020MB078 and ZR2021QB085)the National Natural Science Foundation of China(51877216 and 22109178)+6 种基金Taishan Scholar Foundation(tsqn20161017)China Postdoctoral Science Foundation(2021M693498)the Postdoctoral Innovative Talent Support Program of Shandong Province(SDBX2021005)the Postdoctoral Innovation Project of Shandong Province(202101009)the Postdoctoral Applied Research Program of Qingdao(qdyy20200071)the Fundamental Research Funds for the Central Universities(19CX05001A,19CX05002A,and 20CX06101A)the Research Project of State Key Laboratory for Heavy Oil Processing(SLK-ZZKT-2021)。
文摘Using the same materials for the cathode and anode in energy storage devices could greatly simplify the technological process and reduce the device cost significantly.In this paper,we assemble a dual carbon-based Li-ion capacitor with the active materials derived entirely from a single precursor,petroleum coke.For the anode,petroleum cokederived carbon(PCC)is prepared by simple ball milling and carbonization,having a massive tap density(1.80 g cm^(-3))and high electrical conductivity(11.5 S cm^(-1)).For the cathode,the raw petroleum coke is activated by KOH(petroleum cokeactivated carbon(PC-AC)sample)to achieve a well-developed pore structure to meet a rapid capacitive behavior.As a result,in addition to the robust structural stability of both the anode and cathode,the assembled dual carbon Li-ion capacitor shows a high energy density(231 W h kg^(-1)/206 W h L^(-1))and ultralong cycling life(up to 3000/10,000 cycles)at a wide voltage window.The excellent electrochemical response and simple production process make the PCC materials have great potential for practical application.
基金supported by the Group Project for Innovation Research under the National Natural Science Foundation of China(NSFC)"Research on China's Economic Development Law and Governance Mechanism"(No.72121002)General Project of the NSFC"Design of Fiscal Incentive Mechanism to Promote Green Transformation:From a Perspective Linking the Relationship between Central/Local Governments and Enterprises"(No.72173136).
文摘Carbon peaking and carbon neutrality constitute an extensive,profound and systemic economic and social change.It is worthwhile to explore how fiscal policy,as a key institutional arrangement in the public policy system to cope with climate change,can play a fundamental and pillar role.Based on literatures,theories and empirical materials,this paper systematically explores the relationship between climate change and public finance.The fiscal impact of climate change will eventually be reflected in fiscal behavior,fiscal costs and fiscal relations,and the fiscal system has the adaptability of an"automatic stabilizer"and the proactiveness to enable the Discretionary Approaches function when facing climate change impacts.This implies such a governance logic of fiscal policy that is systematic,forward-looking and flexible in addressing climate change.In the future,it is necessary to further incorporate climate change or related environmental factors into the fiscal policy framework,target the two key aspects of mitigation and adaptation,and carry out a holistic,systematic and forward-looking reform of the existing fiscal expenditure policy,fiscal revenue policy,fiscal investment and financing policy,government budget system,government procurement policy and ecological compensation policy.While highlighting the"governance"function of fiscal policy in addressing climate change,Chinese government needs to strengthen the coordination and collaboration between fiscal policy tools and other public policies,and magnify the governance effectiveness of fiscal policy in the process of addressing climate change.This paper helps understand the positioning,role and influence of fiscal policy in the process of addressing climate change,provides a basis for better playing the fundamental and underpinning role of the modern fiscal system in the governance of ecological civilization,and presents an analytical framework for building a theoretical system of ecological fiscal governance.
基金funded by the General Program of the National Natural Science Foundation of China [Grant No.72473059]the Ministry of Education Humanities and Social Science Planning Fund Project [Grant No.23YJA790026]+1 种基金the Yunnan Province Basic Research Program General Project [Grant No.202401AT070393]the Innovation and Development Research Think Tank for Resource based Industries at Kunming University of Technology [Grant No.XXZK20-23006].
文摘At the intersection of the“dual carbon”goal and the era of digital intelligence(DI),exploring the synergy between pollution and carbon reduction(SPCR)within the context of DI is important for promoting a comprehensive green transformation of economic and social development.This study,based on urban panel data from 281 prefecture-level cities in China' Mainland from 2010 to 2020,developed a DI indicator system for these cities and employed a double machine learning algorithm for the first time to investigate the intrinsic mechanisms and incentivizing effects of DI on SPCR.The results showed that:①DI significantly promotes SPCR.②Mechanism tests demonstrated that DI can indirectly enhance SPCR by optimizing resource allocation and reinforcing government interventions.③Further analysis showed that the impact of DI on SPCR was more substantial in regions with lower levels of economic and environmental competition.Moreover,the SPCR driven by DI exhibited heterogeneity,characterized by stronger effects in“resource-based cities>non resource-based cities”and“non-capital economic zones>capital economic zones”.The conclusions of this study hold significant implications for fully harnessing the synergy between digitization and intelligence to empower SPCR.In addition,the findings are valuable for the government’s integrated promotion of the“dual carbon”goal and the“digital China”strategy.
基金supported by the HK Innovation and Technology Fund (ITS/004/14)the HK-RGC General Research Funds (GRE No. HKUST 606511)
文摘We develop a dual porous （DP） TiO2 film for the electron transporting layer （ETL） in carbon cathode based perovskite solar cells （C-PSCs）. The DP TiO2 film was synthesized via a facile PS-templated method with the thickness being controlled by the spin-coating speed. It was found that there is an optimum DP TiO2 film thickness for achieving an effective ETL, a suitable perovskite]TiO2 interface, an efficient light harvester and thus a high performance C-PSC. In particular, such a DP TiO2 film can act as a scaffold for complete-filling of the pores with perovskite and for forming high-quality perovskite crystals that are seamlessly interfaced with Ti02 to enhance interracial charge injection. Leveraging the unique advantages of DP TiO2 ETL, together with a dense-packed and pinhole-free TiO2 compact layer, PCE of the C-PSCs has reached 9.81% with good stability.
基金This paper is supported by the National High Technology Research andDevelopment Programof China (No .863-306-ZT01-02-3) .
文摘The estimation of fractures is key to evaluating fractured carbonate reservoirs. It is difficult to evaluate this kind of reservoir because of its heterogeneously distributed fractures and anisotropy, A three-dimensional numerical model was used to simulate the responses of the dual laterolog （DLL） in a fractured formation based on a macro-isotropic anisotropic model, Accordingly, a fast fracture computing method was developed. First, the apparent conductivity of the DLL is linearly related to the porosity of the fracture and the conductivity of pore fluid. Second, the amplitude difference of the deep and shallow apparent resistivity logs is mainly dependent on the dip angle of the fracture. Then the response of the DLL to a formation with dip angle fractures is approximately depicted as a function of the bulk resistivity of the rock, the porosity of the fractures and the conductivity of fracture fluid. This function can be used to compute the porosity of fracture quickly. The actual data show that the fracture parameters determined by the DLL closely coincide with the formation micro imager log.
基金supported by the National Natural Science Foundation of China(Nos.20473057 and 20673076)Shanghai Nanotechnology Promotion Center(Nos.0652nm030 and 0752nm006).
文摘We demonstrated a simple and effective dual-templating approach for the synthesis of hierarchically mesocellular carbon foams by using nonionic surfactant of sorbitan monooleate and silica colloid particles as sacrificial templates, and resorcinol/ formaldehyde as carbon source. The representative carbon foam has dual mesopore sizes of 4 and 10 nm, and possesses the specific surface area of 580 m^2/g and the total pore volume of 0.80 cm^3/g.
基金Supports from the National Natural Science Foundation of China (51872115 and 51802110)the National Key R&D Program of China (2016YFA0200400)+2 种基金the Jilin Province/Jilin University Co-construction Project-Funds for New Materials (SXGJSF20173, Branch-2/440050316A36)the Program for JLU Science and Technology Innovative Research Team (JLUSTIRT, 2017TD-09)“Double-First Class” Discipline for Materials Science & Engineering, are greatly acknowledged
文摘In dual-ion batteries (DIBs), energy storage is achieved by intercalation/de-intercalation of both cations and anions. Due to the mismatch between ion diameter and layer space of active materials, however, volume expansion and exfoliation always occur for electrode materials. Herein, an integrated electrode Co3O4/carbon fiber paper (CFP) is prepared as the anode of DIB. As the Co3O4 nanosheets grow on CFP substrate vertically, it promotes the immersion of electrolyte and shortens the pathway for ionic transport. Besides, the strong interaction between Co3O4 and CFP substrate reduces the possibility of sheet exfoliation. An integrated-electrode-based DIB is therefore packaged using Co3O4/CFP as anode and graphite as cathode. As a result, a high energy density of 72 Wh/kg is achieved at a power density of 150 W/kg. The design of integrated electrode provides a new route for the development of high-performance DIBs.
基金supported by the National Natural Science Foundation of China (grant no. 51672151).
文摘Lithium-ion hybrid supercapacitors(Li-HSCs) and dual-ion batteries(DIBs) are two types of energy storage devices that have attracted extensive research interest in recent years. Li-HSCs and DIBs have similarities in device structure, tendency for ion migration, and energy storage mechanisms at the negative electrode. However, these devices have differences in energy storage mechanisms and working potentials at the positive electrode. Here, we first realize the integration of a Li-HSC and a DIB to form a dual-ion hybrid supercapacitor(DIHSC), by employing mesocarbon microbead(MCMB)-based porous graphitic carbon(PGC) with a partially graphitized structure and porous structure as a positive electrode material. The MCMB-PGC-based DIHSC exhibits a novel dual-ion battery-capacitor hybrid mechanism: it exhibits excellent electronic double-layer capacitor(EDLC) behavior like a Li-HSC in the low-middle wide potential range and anion intercalation/de-intercalation behavior like a DIB in the high-potential range. Two types of mechanisms are observed in the electrochemical characterization process, and the energy density of the new DIHSC is significantly increased.
基金financially supported by the National Natural Science Foundation of China(Nos.51672078 and 21473052)Hunan University State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body Independent Research Project(No.71675004)+2 种基金the Fundamental Research Funds for the Central UniversitiesHunan Natural Science Foundation(2019JJ40031)Foundation of State Key Laboratory of Coal Conversion(Grant J1718-903)。
文摘A novel carbon foam with microporous structure(CFMS),with the advantages of a simple fabrication process,low energy consumption,large specific surface area and high conductivity,has been prepared by a facile one-step carbonization.In addition,the carbon foam possesses suitable interlayer spacing in short range which is flexible to accommodate the deformation of carbon layer caused by the ion insertion and deinsertion at the charge and discharge state.Furthermore,a low cost carbon-based symmetric potassium dual-ion capacitor(PDIC),which integrates the virtues of potassium ion capacitors and dual-ion batteries,is successfully established with CFMS as both the battery-type cathode and the capacitor-type anode.PDIC displays a superior rate performance,an ultra-long cycle life(90%retention after 10000 cycles),and a high power density of 7800 W kg^-1 at an energy density of 39Whkg^-1.The PDIC also exhibits excellent ultrafast charge and slow discharge properties,with a full charge in just 60 s and a discharge time of more than 3000 s.
