制备方法对石墨粉结构及嵌锂性能的影响  

INFLUENCE OF FABRICATION ON THE PARTICLE STRUCTURES AND LITHIUM-STORED PROPERTIES OF GRAPHITE POWDER

作　　者：翟玉梅[1] 唐致远[1] 王双元[1] 刘春燕[1] 

机构地区：[1]天津大学化工学院,天津300072

出　　处：《天津大学学报（自然科学与工程技术版）》2001年第1期9-12,共4页Journal of Tianjin University：Science and Technology

基　　金：一碳国家重点实验室基金!项目 (KF970 0 5)

摘　　要：由不同制备方法获得 3种石墨粉 ,对它们进行了结构分析和电化学嵌锂性能的研究 .通过 XRD、SEM和 BET比表面积等结构测试 ,发现以某种方式粉碎石墨化成型体可以获得石墨化度高、微晶尺寸小、颗粒内有大量微裂缝的石墨粉 .这种石墨粉具有高比容量和良好的循环性能 .组装成扣式电池以 0 .32 m A/ cm2充放电时 ,前 10次平均放电比容量可达35 5 m A· h/ g,可望用作锂离子电池负极材料 .Three kinds of graphite powder were prepared in different ways.The structure and morphology of the graphite particle were investigated by XRD,SEM,and BET,It is found that the graphite powder obtained from a graphitized formation has a small interlayer(d 002 )distance and crystallite size,a large number of microscopic fissure structures in the particle,which is believed to be,suitable for a large lithium-stored capacity.Using LiCoO 2 as positive electrode,such a graphite powder exhibits an average specific discharge capacity of 355 mA·h/g after 10 cycles at 0.32 mA/cm 2.

关 键 词：石墨粉 制备 颗粒结构 嵌锂性能 锂离子电池 

分 类 号：TM912.9[电气工程—电力电子与电力传动] TQ127.11[化学工程—无机化工]