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The mechanism of side reaction induced capacity fading of Ni-rich cathode materials for lithium ion batteries 被引量:11

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摘要 Ni-rich cathode materials show great potential of applying in high-energy lithium ion batteries,but their inferior cycling stability hinders this process.Study on the electrode/electrolyte interfacial reaction is indispensable to understand the capacity failure mechanism of Ni-rich cathode materials and further address this issue.This work demonstrates the domain size effects on interfacial side reactions firstly,and further analyzes the inherent mechanism of side reaction induced capacity decay through comparing the interfacial behaviors before and after MgO coating.It has been determined that LiF deposition caused thicker SEI films may not increase the surface film resistance,while HF erosion induced surface phase transition will increase the charge transfer resistance,and the later plays the dominant factor to declined capacity of Ni-rich cathode materials.This work suggests strategies to suppress the capacity decay of layered cathode materials and provides a guidance for the domain size control to match the various applications under different current rates.
出处 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2021年第7期1-8,共8页 能源化学(英文版)
基金 supported by the National Key R&D Program of China(2016YFB0100301) the National Natural Science Foundation of China(21875022,51802020,U1664255) the Science and Technology Innovation Foundation of Beijing Institute of Technology Chongqing Innovation Center(2020CX5100006) the Young Elite Scientists Sponsorship Program by CAST(2018QNRC001) the support from the Beijing Institute of Technology Research Fund Program for Young Scholars。
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