摘要
二维(2D)多孔碳纳米片是通过一种简便,低成本的方法合成的。在该方法中,以中温煤沥青作为碳前驱体,采用氯化钠作为水溶性模板。通过煤沥青和氯化钠的碳化以及随后的KOH化学活化来制备高度多孔的碳纳米片。所制备的碳纳米片(AC-NaCl)具有高达1 581 m^2/g的比表面积。多孔碳纳米片厚度小于200 nm,具有更多暴露的活性位点和离子运输途径,为离子储存和运输提供了方便。在6 mol/L KOH电解液溶液中,表现出优良的电容性能(193F/g,1 A/g)和良好的循环稳定性,经过5 000次充放电后,电容保留率超过了94.9%。
Two-dimensional(2 D)porous carbon nanosheets were synthesized by a facile,low-cost method. Herein,coal tar pitch was used as a carbon precursor and sodium chloride was employed as a water soluble template.The highly porous carbon nanosheets were prepared by the carbonization of coal tar pitch and sodium chloride and the following KOH chemical activation. The as-prepared carbon nanosheets(AC-NaCl)possess a large specific surface area up to 1 581 m^2/g. The resulting carbon sheets possess a thickness of less than 200 nm,which is beneficial to ion storage and transport due to the availability of more exposed active sites and the convenience of ion transport pathways. In 6 mol/L KOH electrolyte exhibits an outstanding capacitive performance(193 F/g,1 A/g),and a good cycling durability with over 94.9% capacitance retention after 5000 charge-discharge cycles at 1 A/g.
作者
徐素鹏
郑安雄
XU Su-peng;ZHENG An-xiong(Department of Metallurgy and Chemical Engineering,Jiyuan Vocational and Technical College,Jiyuan 459000,China;Technical Center of Henan Zhongyuan Special Steel Equipment manufacturing Co.,Ltd.,Jiyuan 459000,China)
出处
《粉末冶金工业》
CAS
北大核心
2020年第4期57-61,共5页
Powder Metallurgy Industry
基金
济源市科技攻关项目(18022012)。
关键词
煤沥青
多孔碳纳米片
超级电容器
电化学性能
coal tar pitch
porous carbon nanosheet
supercapacitor
electrochemical performance
