碳纳米管和石墨在电化学嵌锂过程中的协同效应  

Cooperation Action of Carbon Nanotubes and Graphite During Lithium Electrochemical Intercalation

作　　者：李志杰[1] 梁奇[1] 陈栋梁[1] 瞿美臻[1] 张伯兰[1] 于作龙[1] 

机构地区：[1]中国科学院成都有机化学研究所,成都610041

出　　处：《应用化学》2001年第4期269-271,共3页Chinese Journal of Applied Chemistry

基　　金：中国科学院知识创新工程重大基金项目!( KJCX1-Y-0 2 )

摘　　要：将碳纳米管部分掺入石墨材料中用作锂离子电池电极材料 ,二者形成许多纳米级微孔 ,为锂离子提供了更多的嵌入脱出空间 ,使可逆容量得以提高 ,而且碳纳米管可以起到桥梁的作用 ,增强了材料的导电性 ,避免了石墨在充放电过程中产生孤岛效应 .结果表明 ,这种掺杂材料的首次可逆容量为 3 4 1 .8m A·h/ g,循环 1 0次后可逆容量保持率为 94 .5% .Carbon nanotubes and graphite were mixed and used as anode material for lithium ion battery. A great many of nano scale pores were formed between carbon nanotubes and graphite, improving the charge discharge capacity of the mixture. Moreover,as a bridge, the carbon nanotubes could improve the property of electric conduction and avoid the effect of isolated island during the lithium intercalation and de intercalation. The reversible capacity of the anode materials on first cycle was 341 8 mA·h/g , and maintained at 94 5% after 10 cycles. The charge discharge behavior of the mixed materials was better than that of the single carbon nanotubes or graphite.

关 键 词：碳纳米管 石墨 锂离子电池 负极材料 电化学嵌锂 协同效应 

分 类 号：TM912[电气工程—电力电子与电力传动] TM242[一般工业技术—材料科学与工程]