催化石墨化MCMB用作锂离子电池负极材料  

MCMB after catalytic graphitization at high temperature as anode materials of lithium-ion batteries

作　　者：时志强[1] 郭春雨[2] 易炜[2] 张永刚[3] 王成扬[1] 

机构地区：[1]天津大学化工学院绿色合成与转化教育部重点实验室,天津300072 [2]中国电子科技集团公司第十八研究所,天津300381 [3]天津工业大学材料科学与化学工程学院,天津300160

出　　处：《电源技术》2009年第12期1061-1063,共3页Chinese Journal of Power Sources

基　　金："十一五""863"计划节能与新能源汽车专项项目(2006AA11A161);国家自然科学基金项目(50602030)

摘　　要：采用Fe(NO3)3对中间相炭微球进行高温催化石墨化处理,制备锂离子电池负极材料。采用Raman光谱、X-射线衍射法、恒电流充放电等对样品进行测试和表征。结果表明,经催化石墨化处理的MCMB内部石墨微晶结构未发生明显变化,而表面碳层的石墨化程度提高;处理后的MCMB的首次可逆放电比容量由直接石墨化MCMB的333.8mAh/g提高到362.3mAh/g,第50次循环放电比容量与首次循环放电比容量的比值从92.4%提高到97.7%。Mesocarbon microbead （MCMB） was graphitized with the existence of Fe（NO3）3 to prepare anode materials of Li-ion batteries. The structure and electrochemical properties of the sample were characterized by Raman spectroscopy, XRD analysis and charge-discharge measurements. It is found that the microcrystalline structure of MCMB after catalytic graphitization is not changed obviously, but the graphitization degree of the carbon layer on the surface of MCMB is improved. The first reversible capacity of the sample as anode materials for Li-ion batteries is improved to 362.3 mAh/g from 333.8 mAh/g of the sample without Fe（NO3）3, and the capacitance ratio of 50th cycles to the initial is improved to 97.7% from 92.4%.

关 键 词：中间相炭微球(MCMB) 催化石墨化 锂离子电池 负极材料 

分 类 号：TM912[电气工程—电力电子与电力传动]