Ni-Co-Mn-H2O系电位-pH图绘制及其应用  

Drawing and application of potential-pH diagram of Ni-Co-Mn-H2O system

作　　者：苏向东[1] 董雄文 彭天剑 陈肖虎 雷尚荣 罗文波 丁元法 SU Xiangdong;DONG Xiongwen;PENG Tianjian;CHEN Xiaohu;LEI Shangrong;LUO Wenbo;DING Yuanfa(Guizhou Key Laboratory of Light Metal Materials Processing Technology,Guizhou Institute of Technology,Guiyang 550002,China;Guizhou Dalong Huicheng New Material Co.Ltd.,Tongren 554001,China)

机构地区：[1]贵州理工学院贵州省轻金属材料制备技术重点实验室,贵州贵阳550002 [2]贵州大龙汇成新材料有限公司,贵州铜仁554001

出　　处：《贵州科学》2019年第6期87-90,共4页Guizhou Science

摘　　要：通过热力学计算,绘制出Ni-Co-Mn-H 2O系在298K时的电位-pH图。由图分析可知在溶液pH值大于7.641时可以获得镍、钴、锰共沉淀,如果提高体系的电位,可以在更低的pH值条件下获得镍钴锰共沉淀。由此得出结论,在Ni、Co、Mn元素存在的水溶液体系中通过多因素调控可采用不同的共沉淀工艺制备镍钴锰三元前驱体是可行的,为镍钴锰三元锂离子电池正极材料的制备工艺选择提供了理论指导。The potential-pH diagram of Ni-Co-Mn-H 2O system at 298 K was obtained by thermodynamic calculation.Theoretically,co-precipitation of nickel,cobalt and manganese can form when the pH value of the solution is greater than 7.641.If the potential of the system is increased,nickel-cobalt-manganese co-precipitation can be produced at a lower pH.Therefore,it is theoretically feasible to produce nickel-cobalt-manganese ternary precursor by co-precipitation method.This study has provided theoretical guidance for the production of the anode material for nickel-cobalt-manganese ternary lithium ion battery.

关 键 词：电位-PH图 锂离子电池 正极材料 镍 钴 锰 

分 类 号：TG115[金属学及工艺—物理冶金]