国产石墨作为锂离子蓄电池负极材料的性能

Performances of homemade graphite as anode material for Li-ion battery

主要研究了典型国产石墨的排列结构和直接作为锂离子蓄电池负极材料的电化学性能。结果表明不同的石墨产品 ,其排列结构和电化学性能存在较大差异。并且直接用于锂离子蓄电池负极材料还存在着容量和效率偏低 ,松装和振实密度小 ,循环不是很理想的问题 ,需要对其进行有效的改性处理 ,以满足电池性能和工艺要求。通过对国产石墨进一步包覆处理后 。

The stack structure of typical homemade graphite and its electrochemical performance as anode mate rial without any treatment for Li ion battery were studied. The results show that the stack structures and electrochemical performances of various graphite are of great difference. When the graphite samples are used as anode materials without any treatment for Li ion batteries, their capacity, coulombic efficiency, bulk density and tap density is low while their cyclic performances are not ideal. Modification treatment is necessary for the graphite samples to meet the specification of battery performance and technical requirement. The physical and electrochemical performances of homemade graphite after further coating treatment are improved obviously.