液相沉淀法制备四氧化三钴技术改进研究  

Study on Improvement of Preparation Technology of Cobalt Tetraoxide by Liquid Phase Precipitation Method

作　　者：叶圣毅 Ye Shengyi(Gem(Jiangsu)Cobalt Industry Co.,Ltd.,Taixing 225400,China)

机构地区：[1]格林美(江苏)钴业股份有限公司,江苏泰兴225400

出　　处：《山东化工》2023年第16期32-33,37,共3页Shandong Chemical Industry

摘　　要：针对锂电池正极材料钴酸锂前驱体—四氧化三钴生产实践中遇到的问题,开发设计了液相合成制备纯相四氧化三钴生产技术,以氯化钴溶液为钴源,氢氧化钠为沉淀剂,乙二胺四乙酸为络合剂,空气为氧化剂,控制合成条件,直接液相合成纯相氧化钴,再经低温烘干制得四氧化三钴粉末。该工艺流程精简、生产周期短(≤18 h)、生产中无氨氮废水排放、能耗低,且产品活性高。产品为高球形度球形颗粒,振实密度为(2.9±0.3)g/cm^(3)、比表面积为(1.8±0.8)m^(2)/g。In response to the problems encountered in the production practice of cobalt tetraoxide,a precursor of lithium cobalt oxide as a cathode material for lithium batteries,a production technology for preparing pure cobalt tetraoxide by liquid phase synthesis was developed and designed.Using cobalt chloride solution as a cobalt source,sodium hydroxide as a precipitator,ethylenediamine tetraacetic acid as a complexing agent,and air as an oxidant,the synthesis conditions were controlled,and pure cobalt tetraoxide was directly synthesized in liquid phase,followed by low-temperature drying to obtain cobalt tetraoxide powder.This process is characterized by simplified process flow,short production cycle(≤18 h),no ammonia nitrogen wastewater discharge during production,low energy consumption,and high product activity.The product is a spherical particle with high sphericity,a compacted density of(2.9±0.3)g/cm^(3),and a specific surface area of(1.8±0.8)m^(2)/g.

关 键 词：锂电池 正极材料 四氧化三钴 液相合成 工艺优化 

分 类 号：TQ138.12[化学工程—无机化工]