锂离子电池负极石墨材料的修饰与改性

综述了用于锂离子电池负极的石墨材料的修饰与改性方法 ,所研究的石墨材料包括天然石墨、人造石墨和石墨化碳纤维。修饰与改性方法包括形成包敷层和金属层、表面氧化、机械研磨以及掺杂等方法。这些方法可有效提高石墨电极的容量、库仑效率或大电流性能 ,分析了这些方法能提高电极性能的原因并指出了存在的问题。

Modifications of graphite material for negative electrode of Li-ion batteries

Modifications of graphite materials for negative electrode of lithium ion batteries were reviewed. Natural graphite, artificial graphite and graphitic carbon fiber were discussed. The methods of modification included the surface covering of graphite with a layer of disorganized carbon or a film of appropriate metal, surface oxidation, mechanical grinding and doping.Some improvements in capacity, coulombic efficiency or high rate dischargeability were achieved. The enhancing of electrochemical performance was analyzed and the problems existed was proposed.