电源技术2018，Vol.42Issue(2)：172-174,222,4.
沥青基球形硬炭的电化学性能研究
Study on electrochemical properties of pitch-based spherical hard carbon
摘要
Abstract
The particulate and spherical hard carbons were prepared by heating petroleum pitch precursors in suspension liquid.The morphology and structure of hard carbon were characterized by X-ray diffraction,scanning electron microscope and CO2 adsorption measurements.The electrochemical performance was tested by constant charge-discharge and electrochemical impedance spectroscopy.The results show that as the heat-treatment temperature increases from 1 000 ℃ to 1 400 ℃,the CO2 adsorption specific surface area,pore volume and charge-discharge capacity of the spherical hard carbon material gradually decrease,while the first columbic efficiency gradually increases.The volume capacity of the spherical hard carbon material is 17.7％ higher than the particulate one after 100 cycles at the current density of 37.2 mA/g,the resistance of the spherical hard carbon is smaller,and the specific capacity of the spherical hard carbon is 103.3 mAh/g at the current density of 1 860 mA/g.关键词
球形硬炭/负极/锂离子电池/电化学性能Key words
spherical hard carbon/anode/lithium ion battery/electrochemical performance分类
信息技术与安全科学引用本文复制引用
余盼,梁晓怿,杨全俊,冯秀文..沥青基球形硬炭的电化学性能研究[J].电源技术,2018,42(2):172-174,222,4.基金项目
国家自然科学基金资助项目(21177038) （21177038）
