微晶石墨作为阳极材料对二次锂离子电池电化学性能的影响  

THE EFFECT OF CRYSTALLINE GRAPHITE AS ANODE MATERIALS ON THE ELECTROCHEMICAL PROPERTIES OF SECONDARY LITHIUM ION BATTERY

作　　者：董建[1] 周伟[1] 刘旋[1] 康飞宇[1] 沈万慈[1] 

机构地区：[1]北京清华大学材料系石墨组,北京100084

出　　处：《炭素技术》1999年第S1期1-6,共6页Carbon Techniques

摘　　要：利用Li－C实验电池，得到了微晶石墨（无定形石墨）作阳极材料时，其成分、粒度对锂离子电池电化学性能的影响。结果表明，微晶石墨在0．7V左右的不可逆容量与石墨颗粒的粒度和纯度无关；随着杂质含量的减少，可逆容量略有增加，但不可逆插入容量明显减少；杂质的成分与含量对微晶石墨的循环性能的影响不大；其可逆容量与不可逆插入容量都随着石墨粒度减小而增大；颗粒大小对其循环性能的影响不大。The effects of content and grain size of crystalline graphite (so - called amorphous graphite) as anode on theelectrochemical properties of secondary lithium ion battery were investigaed with experimential Li - C battery. The re-sults show that the irreversible capacity at 0. 7 V is not related to the size and content of graphite particles. With the de-crease of impurity content, the reversible capacity of graphite increases genily, but the irreversible capacity decreased great-ly. The effect of ingredient and content of impurity on the reversibility is litile, so is the size of graphite grain. The re-versible and irreversible capacity increases with the decreasnd size of graphite grain.

关 键 词：无定形石墨 阳极 二次锂离子电池 不可逆容量 

分 类 号：O646[理学—物理化学]