Method for preparing lithium cobalt oxide positive electrode material of lithium ion battery by taking Co-Li bimetallic metal-organic framework (MOFs) material as precursor

• Main Authors: XUAN XIAOPENG, ZHAO PEIZHENG, LU GUODONG
• Format: Patent
• Language: Chinese; English
• Published: 11.06.2019
• 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 method for preparing a lithium cobalt oxide positive electrode material of a lithium ion battery by taking a Co-Li bimetallic metal-organic framework (MOFs) material as a precursor. The method comprises the following steps: carrying out ultrasonic mixing on cobalt acetate tetrahydrate, lithium hydroxide monohydrate and 1,3-isophthalic acid, carrying out a constant-temperature heating reaction to prepare the MOFs material, carrying out washing, drying and grinding, and then carrying out calcining in a nitrogen atmosphere and an air atmosphere to obtain the lithium cobalt oxide positive electrode material of the lithium ion battery. The preparation method disclosed by the invention not only can improve uniformity of the materials during mixing, but also greatly shortens the time required for calcining synthesis of lithium cobalt oxide, and crystal crystallinity and specific capacity of the prepared material are greatly improved. The prepared material is preparedinto a working electrode