石墨添加对中间相炭微球电化学性能的影响  

EFFECT OF GRAPHITE ADDITIVES ON ELECTROCHEMICAL PERFORMANCE OF MESOCARBON MICROBEADS

作　　者：赵海[1] 胡成秋[1] 

机构地区：[1]中钢集团鞍山热能研究院,辽宁鞍山114004

出　　处：《炭素》2005年第2期30-34,共5页Carbon

摘　　要：以煤焦油沥青为原料,采用聚合法制备中间相炭微球。研究了不同天然鳞片石墨添加量在相同热处理条件下得到的中间相炭微球作为锂离子电池炭负极材料的电化学性能。研究结果表明,石墨的添加使中间相炭微球内部结构变的复杂,X衍射显示石墨的添加降低了炭微球的石墨化度和晶形尺寸。随石墨添加量的增加,电池的首次充放电容量和效率有所减小,三次循环后充放电效率趋于一致。<Abstrcat>MCMBs were prepared from coal tar pitch with or without natural flake-like graphite and charge-discharge properties were studied.The addition of graphite,the XRD spectra show,decreases the graphitization degree and crystal sizes of MCMB.It was found that,with the graphite content increasing,the discharge capacity and efficiency decreased during the first cycle,after the third cyclo efficiencies tend to the same value.

关 键 词：天然石墨 中间相炭微球 热缩聚 充放电性能 

分 类 号：TQ522.6[化学工程—煤化学工程]