化工学报2018，Vol.69Issue(1)：175-187,13.DOI:10.11949/j.issn.0438-1157.20171308
共沉淀法制备LiNi1-x-yCoxMnyO2正极材料工艺条件探究
Investigation on synthesis conditions of LiNi1-x-yCoxMnyO2 cathode materialvia co-precipitation
摘要
Abstract
Layer-structured spherical cathode material, LiNi1-x-yCoxMnyO2, with high purity can be prepared by co-precipitation with high efficiency and low energy consumption.This method has been widely applied in both fundamental research and industrial production, mainly including co-precipitation and high-temperature calcination processes.The mechanisms and influence factors involved in each procedure were elaborated and analyzed.The nucleation process and the complexation and precipitation reactions of Ni, Co and Mn ions were investigated in the key step of co-precipitation for the preparation of precursor.Based on the established equilibrium equations of reactions and thermodynamics, the two-dimensional variations of the three non-precipitated metal concentrations and their mutual ratios for different pH and amounts of NH3 were thoroughly analyzed.Through the analysis results, theoretical optimum conditions for the cathode material with desired metal-ion ratios were thus proposed for the first time.In addition, by means of analyzing the structural characteristics of the precursor and cathode material as well as the electrochemical activity of the final material,the proper operation conditions were qualitatively investigated.Finally, the scientific method for optimizing the process conditions of LiNi1-x-yCoxMnyO2 cathode material was prospected.关键词
LiNi1-x-yCoxMnyO2/正极材料/颗粒过程/共沉淀/制备/热力学/高温煅烧Key words
LiNi1-x-yCoxMnyO2/cathode material/particulate processes/co-precipitation/preparation/thermodynamics/calcination分类
化学化工引用本文复制引用
耿淑君,黄青山,朱全红,金永成,杨超..共沉淀法制备LiNi1-x-yCoxMnyO2正极材料工艺条件探究[J].化工学报,2018,69(1):175-187,13.基金项目
国家重点研发计划项目(2016YFB0301701) （2016YFB0301701）
国家自然科学基金项目(91434114,21376254) （91434114,21376254）
中国科学院科研装备研制项目(YZ201641).supported by the National Key Research and Development Program of China (2016YFB0301701),the National Natural Science Foundation of China (91434114,21376254) and the Instrument Developing Project of the Chinese Academy of Sciences (YZ201641). （YZ201641）
