摘要
以锂盐、钴盐、磷酸盐为原料,以柠檬酸为碳源,采用喷雾闪速分解法制备锂离子电池正极材料LiCoPO_4粉体.研究前驱体溶液体系、喷雾闪速热分解温度、前驱体溶液浓度、热处理温度对锂离子电池正极材料LiCoPO_4粉体结构组分和微观形貌的影响.粉体结构组分和微观形貌通过XRD、SEM表征.结果表明:采用硝酸盐体系、选择前驱体浓度0.2mol/L、闪速热分解温度400℃、热处理温度600℃、热处理时间6h,可得到晶型完整、粒度分布均匀的实心球体LiCoPO_4.
Taking lithium and cobalt salt and nitrate as raw materials and citric acid as carbon source,the lithium ion battery anode material,LiCoPO_4 powder,was prepared by spray flash decomposition method.The effects of precursor solution system,spray flash decomposition temperature,precursor solution concentration,heat treatment temperature on the structural composition and microstructural morphology of LiCoPO_4 powder were investigated and the powder was characterized with XRD and SEM.The results indicated that to get solid spheric LiCoPO_4 cells with complete crystal forms and uniform distribution of crystalline size,the raw material should be nitrate system,the precursor concentration was 0.2mol/L,flash decomposition temperature was 400 ℃,heat treatment temperature was 600 ℃ and heat treatment time was 6hours.
引文
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