石墨烯在锂离子电池电极材料中的应用

摘要

随着电子产品的普及,对锂离子电池的可逆容量、倍率充放电能力和循环稳定性提出了更高的要求.石墨烯由于其独特的电子共轭态和单一的原子层结构,具有优越的电子迁移性、大的表面积和良好的热和化学稳定性.因此,众多研究者致力于借助石墨烯的独有特性来改善锂离子电池正极和负极材料的综合电化学性能.本文对石墨烯在锂离子电池正负极材料中的应用情况以及面临的主要问题做了简要综述.%It is challenging to develop lithium ion batteries (LIBs) possessing simultaneously large reversible capacity,high rate capability,and good cycling stability.Graphene sheets,owing to the unique electronic conjugate state within the basal plane and also the single atomic layered morphology,have superior electronic mobility,large surface area,and decent thermal and chemical stability.Hence,many works have been devoted to the improvements of the cathode and anode materials with graphene.In the work,the achievements and the main problem in the area are overviewed.