Quaternary lithium-rich manganese-based positive electrode material using Zn to replace Mn and preparation method of quaternary lithium-rich manganese-based positive electrode material

• Main Authors: LYU XIAOXIA, LIU ZHEN
• Format: Patent
• Language: Chinese; English
• Published: 31.03.2020
• Subjects: BASIC ELECTRIC ELEMENTS; CHEMISTRY; COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F; ELECTRICITY; INORGANIC CHEMISTRY; METALLURGY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The invention discloses a quaternary lithium-rich manganese-based positive electrode material using Zn to replace Mn and a preparation method of the quaternary lithium-rich manganese-based positive electrode material, and belongs to the technical field of lithium ion battery positive electrode material production. A carbonate coprecipitation method is adopted, a metal salt solution and a precipitant solution are controlled to react in a base solution to prepare a precursor, and the precursor is calcined to obtain the positive electrode material with the structural formula of xLi2MnO3-(1-x) LiMO2. According to the method disclosed by the invention, the grade resonance is promoted, a more powerful support is provided for the material, and the stability of the material is improved, so that the performance of the positive electrode material is obviously improved, and the circularity is improved. 一种以Zn取代Mn的四元富锂锰基正极材料及其制备方法，属于锂离子电池正极材料生产技术领域。采用碳酸盐共沉淀法，控制金属盐溶液与沉淀剂溶液在底液中反应，制得前驱体，再通过煅烧得到正极材料，其结构式为：xLi2MnO3*(1-x)LiMO2。