Song Liubin, Du Jinlian, Xiao Zhongliang, Jiang Peng, Cao Zhong, Zhu Huali
Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation, School of Chemistry and Food Engineering, Changsha University of Science and Technology, Changsha, China.
School of Physics and Electronic Science, Changsha University of Science and Technology, Changsha, China.
Front Chem. 2020 Aug 28;8:761. doi: 10.3389/fchem.2020.00761. eCollection 2020.
To address increasingly prominent energy problems, lithium-ion batteries have been widely developed. The high-nickel type nickel-cobalt-manganese (NCM) ternary cathode material has attracted attention because of its high energy density, but it has problems such as cation mixing. To address these issues, it is necessary to start from the surface and interface of the cathode material, explore the mechanism underlying the material's structural change and the occurrence of side reactions, and propose corresponding optimization schemes. This article reviews the defects caused by cation mixing and energy bands in high-nickel NCM ternary cathode materials. This review discusses the reasons why the core-shell structure has become an optimized high-nickel ternary cathode material in recent years and the research progress of core-shell materials. The synthesis method of high-nickel NCM ternary cathode material is summarized. A good theoretical basis for future experimental exploration is provided.
为解决日益突出的能源问题，锂离子电池得到了广泛发展。高镍型镍钴锰（NCM）三元正极材料因其高能量密度而备受关注，但存在阳离子混排等问题。为解决这些问题，有必要从正极材料的表面和界面入手，探究材料结构变化及副反应发生的机理，并提出相应的优化方案。本文综述了高镍NCM三元正极材料中阳离子混排和能带导致的缺陷。本综述讨论了核壳结构近年来成为优化高镍三元正极材料的原因以及核壳材料的研究进展。总结了高镍NCM三元正极材料的合成方法。为未来的实验探索提供了良好的理论基础。
