钴酸锂正极材料软化学合成法的关键技术介绍

Introduction of key technologies of soft chemical synthesis of lithium cobalt oxide cathode materials

目前产业化生产钴酸锂正极材料的方法主要为固相合成法,但该方法存在烧结温度高、烧结时间长、能耗大等缺陷,而软化学合成法制备钴酸锂正极材料具有原料成分混合均匀、反应温度低、反应时间短、制得的产品粒度均一性好、利于合成微纳米材料等优势,但软化学合成法存在需处理有机物、难以大面积生产、需处理废水等问题,导致目前国内无法采用软化学合成法大规模生产钴酸锂正极材料,如果能够克服软化学合成法存在的缺陷,则采用软化学合成法制备钴酸锂正极材料可以提高生产效率、大幅度降低生产成本且该方法制备的产品均匀性好。本文从软化学合成法的关键技术出发,总结了软化学合成法制备钴酸锂正极材料的所需原料、工艺参数、改性技术。

The current industrial production method of lithium cobalt oxide cathode material is solid-phase synthesis,but this method has the disadvantages of high sintering temperature,long sintering time and large energy consumption.Now,preparation of lithium cobalt oxide cathode material by soft chemical synthesis has the advantages of raw material components are uniformly mixed,the reaction temperature is low,the reaction time is short,the product size is uniform and able to synthesize micro-nano materials.However,the soft chemical synthesis method has problems such as the need to deal with organic matter,the difficulty of large-scale production and the need to treat waste water.As a result,it is currently impossible to use soft chemical synthesis in large-scale production of lithium cobalt oxide cathode materials in China.If the defects of soft chemical synthesis can be overcome,the use of soft chemical synthesis to prepare lithium cobalt oxide cathode materials can improve production efficiency and greatly reduce the production cost,and the uniformity of the product prepared by this method is good.This article starts from the key technology of the soft chemical synthesis method,summarizes the raw materials and processes parameters and modification technologies required for the preparation of lithium cobalt oxide cathode materials by the soft chemical synthesis method.