高电压三元正极材料研究现状

Research Status of High-voltage Ternary Cathode Materials

三元锂电池材料主要有以下优点:电池成本低廉,高克容量(>150 mAh·g^(-1)),工作电压与国内现有的电解液完全匹配(4.1 V),安全性好,平台相对钴酸锂、锰酸锂低。随着高电压比率大容量三元负极材料的不断完善,镍钴锰三元正极材料被认为是当今最接近于能够实现250~300 Wh·kg^(-1)电池应用目标的一类三元正极材料。着重介绍高电压三元正极材料的改性反应过程和机理、目前面临的一些技术难题,分析总结三元正极材料的改性反应研究发展现状。

Ternary materials have the following advantages: low cost, high gram capacity(>150 mAh/g), working voltage matching the existing electrolyte(4.1 V), good safety, and the platform is relatively low compared to lithium cobalt oxide and lithium manganate, thus it can be seen that it should have very good application prospects.With the continuous improvement of high specific capacity anode materials, nickel-cobalt-manganese ternary materials are the kind of cathode materials that are closest to achieving the goal of 250~300 Wh·kg-1 batteries. In this article, the reaction mechanism of high-voltage ternary cathode materials was introduced, the problems faced by the research institute were discussed, and the research status of the modification of cathode materials was analyzed.