高电压LiCoO2锂电池正极材料的改性研究进展

Research progress of high-voltage LiCoO2 cathode for lithium-ion batteries

摘要:

钴酸锂(LiCoO₂,简称LCO)是应用最广泛的3C数码产品储能正极材料之一,开发高电压LCO正极材料将进一步提高其能量密度和电池续航能力,是未来便携式储能设备的发展趋势。在众多材料改性方法中,体相掺杂和表面修饰作为改善高电压LCO性能最有效的手段,具有极高的学术和应用价值。本文通过介绍用于LCO正极材料体相掺杂以及表面修饰的常用材料、制备方法以及改性机制、协同效应,总结高电压LCO的研究进展,并指出存在的问题以及未来的发展趋势。

Abstract:

Lithium cobalt oxide (LiCoO₂) is one of the most widely used anode materials for energy storage of 3C digital products. The development of high-voltage LiCoO₂ cathode material will further increase its energy density and battery endurance. In a variety of material modification methods, bulk doping and surface modification are the both effective means to improve the performance of high-voltage LiCoO₂, and have extremely high academic and industrial application values. In this paper, we summarize the research progress of high-voltage LiCoO₂ by introducing common materials used for bulk doping and surface modification of LiCoO₂ cathode materials, and their surface modification, preparation methods, modification mechanisms, and synergistic effects. Moreover, existing problems and future development trends are also pointed out.