电化学2011，Vol.17Issue(2)：139-143,5.
包覆型Si/C复合材料的制备及其性能研究
Preparation and Performance of Carbon-Coated Si/C Composites
摘要
Abstract
The Si/C composite for lithium ion batteries was obtained by pyrolyzing and ball-milling. The microstructure and component of the composite was characterized by SEM and XRD, the electrochemical performance was investigated by electrochemical impedance spectroscopy (EIS) ,cyclic voltammetry (CV) and galvano static charge-discharge tests. The results illustrate that the particle of Si/C composite prepared by pyrolysis exhibits inerratic morphology,uniform carbon-coating layer, good electrical conductivity, low resistance. The first intercalated-lithium capacity of the composite material is 4495 mAh/g;the first coulomb efficiency is 65.3％. From the second week the coulomb efficiency maintains 97％ ,and the capacity at the 100th cycle can retain 438 mAh/g.The Si/C composite has good electrochemical cycle stability.关键词
锂离子电池/硅/高温热解法Key words
lithium battery/ silicon/ high temperature pyrolysis分类
信息技术与安全科学引用本文复制引用
杜莉莉,庄全超,魏涛,崔永丽,孙智,孙世刚..包覆型Si/C复合材料的制备及其性能研究[J].电化学,2011,17(2):139-143,5.基金项目
中央高校基本科研业务费专项资金(编号:2010LKHX03、2010QNB04、2010QNB05),中国矿业大学科技攀登计划(编号:ON090237)项目资助 （编号:2010LKHX03、2010QNB04、2010QNB05）
