中间相炭微球用作锂离子电池阳极的充放电性能研究  

CHARGE DISCHARGE PROPERTIES OF THE MESOCARBON MICROBEADS FOR THE ANODS OF LITHIUM ION BATTERIES

作　　者：李宝华 吕永根[2] 凌立成 刘朗[2] 吴东 

机构地区：[1]煤转化国家重点实验室,山西太原030001 [2]中国科学院山西煤炭化学研究所,山西太原030001

出　　处：《新型炭材料》1999年第4期28-33,共6页New Carbon Materials

基　　金：山西省自然科学基金;重质油加工国家重点实验室联合资助

摘　　要：中间相炭微球（ＭＣＭＢｓ）是一种性能优异的锂离子电池阳极用炭材料。研究了经不同温度热处理的ＭＣＭＢｓ 的微观结构与充放电性能的相关性。经７００ ℃～１ ０００ ℃炭化热处理的ＭＣＭＢｓ，随着热处理温度的提高其充放电性能变好，而经１ ７００ ℃～２ ８００ ℃热处理的ＭＣＭＢｓ 的充放电性能变化与此相反。经７００ ℃热处理的ＭＣＭＢ的放电容量为４２５ ｍ Ａｈ／ｇ，超过了石墨的理论容量３７６ ｍ Ａｈ／ｇ，这是由于其内部的微孔起到了锂离子储存“仓库”的作用。Mesocarbon microbeads is a promising carbon material for the anode of lithium ion batteries. MCMBs were heat treated at various temperatures, and the relationship between the microstructure of the MCMBs heat treated at various temperatures and their electrochemical properties for the anode of lithium ion batteries was investigated. It was found that the discharge capacity of MCMBs increased drastically with the temperature rising from 700 ℃ to 1 000 ℃, which was different from that in the temperature range of 1 700 ℃ to 2 800 ℃. The discharge capacity of MCMB heat treated at 700 ℃ was 425 mAh/g which was higher the theoretical capacity of graphite (376 mAh/g).The micropore in MCMBs seems to have some capacity of storing lithium ion.

关 键 词：中间相 炭微球 阳极材料 锂电池 充放电 性能 

分 类 号：TM912.903[电气工程—电力电子与电力传动] TM912.906