摘要
利用小角X射线散射 (SAXS)及恒电流方法对不同时间热处理的中间相炭微球 (MCMBs)的微观物理结构及充放电性能进行了研究。结果表明 ,随着热处理时间的延长 ,MCMBs内部的微孔孔径分布先变宽而后变窄 ,最可几孔径先增加尔后逐渐减小。随着热处理时间的延长MCMBs的首次充放电可逆容量和库伦效率逐渐减小 ,而首次不可逆容量逐渐增加 。
MCMBs were heat treated at 700 ℃ with different time. The relationship between the microstructure of the MCMBs and their electrochemical properties were investigated with SAXS and constant current charge discharge method. It was found that the first reversible capacity and efficiency of MCMBs decreased with prolonging of heat\|treatment time. Otherwise, the first irreversible capacity increased. The micropore in MCMBs seems to have some capacity for lithium ion storage.
出处
《石油大学学报（自然科学版）》
EI
CSCD
北大核心
2001年第6期81-83,87,共4页
Journal of the University of Petroleum,China(Edition of Natural Science)
基金
山西省自然科学基金 ( 995 70 2 -2 )
中科院重点基金和石油大学重质油加工国家重点实验室开放基金 ( 19990 1)
关键词
中间相炭微球
锂离子电池
炭负极
充电
放电
X射线衍射
MCMBs
carbon anode materials
lithium ion battery
charge
discharge
X\|ray diffraction
