摘要
采用沉降法分离高纯度的微粉石墨,得到不同粒度分布的石墨负极材料。采用微电极循环伏安法和恒电流充放电法比较研究了不同粒度石墨样品的电化学性能。结果发现,小颗粒石墨材料的可逆容量和不可逆容量都大于大粒度石墨;在大电流下,大粒度的石墨电极的电化学性能偏差。
High purity graphite with different particle size distributing was gained by sedimentation technology. Its electrochemical performances were studied by galvanostatic charge/discharge cycle and cyclic voltammogram technologies. The results show that graphite electrode with small particle size had both larger reverse specfic capacity and irreverse capacity loss, and graphite electrode with large particle size showed bad electrochemical beheavor at large current.
出处
《电池工业》
CAS
2003年第3期105-109,共5页
Chinese Battery Industry
关键词
锂离子电池
石墨
粒度
电化学性能
不可逆容量
沉降方法
Li-ion battery
graphite
particle size
electrochemical performance
irreverse capacity
sedimentation technology
