摘要
文章采用硬模板法制备了介孔碳,与单质硫混合制备了锂硫电池正极材料,采用BET、XRD、FESEM等测试手段对材料的性能进行表征,并研究了以介孔碳、导电石墨和碳纳米管为导电基体的锂硫电池的电化学性能。结果表明,硫/介孔碳复合材料为正极的电池在0.1C的放电倍率下首次放电比容量为1 389mA·h/g,0.2C倍率下首次放电比容为1 313mA·h/g,100次循环后,库仑效率保持在95%以上,其电化学性能在3种复合材料中最优。
The mesoporous carbon（MC） was prepared by hard-template method. The properties of MC and sulfur-MC（S-MC） cathode materials for lithium-sulfur（Li-S） batteries were characterized by BET,XRD and FESEM. The electrochemical performance of the Li-S batteries with the conductive matrices of MC, conductive graphite KS6 and carbon nanotube（CNT） was determined by AC impedance, cyclic voltammetry and constant-current charge and discharge. The experimental results show that S-MC is superior to the other two kinds of composites with the specific capacity of 1389 mA · h/g and 1 313 mA · h/g in the first discharge at the current rate of 0. 1C and 0.2C, respectively. Its coulombic efficiency at 0.2C after 100 cycles is over 95%.
出处
《合肥工业大学学报（自然科学版）》
CAS
CSCD
北大核心
2016年第11期1477-1482,共6页
Journal of Hefei University of Technology：Natural Science
基金
中央高校基本科研业务费专项资金资助项目(4115100010)
中国科学院战略性先导科技专项基金资助项目(XDA03040000)
关键词
锂硫电池
导电石墨
碳纳米管
介孔碳
比容量
库仑效率
lithium-sulfur（Li-S） battery
conductive graphite KS6
carbon nanotube（CNT）
meso- porous carbon（MC）
specific capacity
coulombic efficiency
