锂离子电池层状结构三元正极材料LiNi_(1/3)Co_(1/3)Mn_(1/3)O_2研究进展

Research Progress of Layered Structural LiNi_(1/3)Co_(1/3)Mn_(1/3)O_2 as a Cathode for Li-ion Battery

三元层状结构Li Ni1/3Co1/3Mn1/3O2具有较高的可逆容量、结构稳定性、热稳定性和相对较低的成本,成为电动汽车领域最具前景的锂离子电池正极材料之一。综述了锂离子电池正极材料Li Ni1/3Co1/3Mn1/3O2的结构、电化学性能及对其进行性能优化的掺杂、表面包覆和制备特殊纳米结构材料的3种方法。其中,纳米材料的研究是锂离子电池正极材料的研究热点之一。材料的电化学性能与粒子尺寸、形貌、多孔性、结晶性和比表面积紧密相关。因此,提高正极材料Li Ni1/3Co1/3Mn1/3O2的电化学性能时,要充分考虑到这些因素的影响。

Layered structural LiNi1/3Co1/3Mn1/3O2 is one of the most promising materials used as a cathode for Li-ion battery in electric vehicles, mainly due to the high capacity, the stable structure, the thermal stability and the low cost of LiNi1/3Co1/3Mn1/3O2. In this review, the structure, the electrochemical performances and the methods for improving its electrochemical performances of LiNi1/3Co1/3Mn1/3O2, such as doping with other ions, coating with other materials and the preparation of special structural nanomaterials, are included. In recent years, the researchers on Li-ion battery are concerned with various nanomaterials. The electrochemical performances of materials are closely related with the size, the morphology, the porosity, the crystalline features and the specific surface area of the material. Therefore, these effects should be considered for improving the electrochemical performances of LiNi1/3Co1/3Mn1/3O2 cathodes.