Synthesis of one-dimensional carbon nanostructures and their application as anode materials in lithium ion batteries  

一维碳纳米结构的有效合成及其在锂离子电池负极材料中的应用(英文)

作　　者：唐晶晶[1] 杨娟[1] 周向阳[1] 陈光辉[1] 黄滨[1] 

机构地区：[1]中南大学冶金与环境学院,长沙410083

出　　处：《Transactions of Nonferrous Metals Society of China》2014年第4期1079-1085,共7页中国有色金属学报（英文版）

基　　金：Projects (51204209,51274240) supported by the National Natural Science Foundation of China

摘　　要：An efficient synthesis of carbon nanofibers by pyrolysis of as-prepared polypyrrole nanowires was reported. Under the subsequent KOH activation, a significant morphology variation was detected and the obtained sample took on a ribbon-like structure. The morphology and structure of the carbon nanofibers and carbon nanoribbons were characterized. When the as-prepared one-dimensional carbon nanostructures were used as anode materials in lithium ion batteries, both of them exhibited superior cyclical stability and good rate properties. After 50 cycles, the reversible capacity of carbon nanofibers electrode maintained 530 mA·h/g. Concerning carbon nanoribbons, the reversible capacity is always larger than 850 mA·h/g and the reversible capacity retention after 23 cycles is 86%.采用热解处理已合成的聚吡咯纳米线实现一维碳纳米纤维的有效合成。在KOH的活化作用下,原始的纤维结构发生变化,获得带状碳纳米结构。对所合成的碳纳米线及碳纳米带进行形貌及结构表征。测试这两种一维碳纳米材料应于于锂离子电池中负极材料的电化学性能。结果表明,一维碳纳米线及一维碳纳米带均表现出较优的循环性能及良好的倍率性能。碳纳米线材料在循环50次后仍保持530 mA·h/g的可逆容量。在前23次充放电循环中,碳纳米带的可逆容量均高于850 mA·h/g,充放电循环到第23次的容量保持率为86%。

关 键 词：carbon nanofibers carbon nanoribbons PYROLYSIS KOH activation lithium ion batteries 

分 类 号：TM912[电气工程—电力电子与电力传动] TB383.1[一般工业技术—材料科学与工程]