Efficient graphene coated lithium cobalt oxide battery cathode material and preparation method thereof
A graphene-coated, positive-electrode material technology, applied in the direction of battery electrodes, circuits, electrical components, etc., can solve problems such as restricting development prospects, lack of cobalt resources, and high prices, and achieve extended storage time, improved self-discharge, and low cost Effect
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[0014] The high-efficiency graphene-coated lithium cobaltate lithium battery positive electrode material is prepared by the following components according to the ratio shown, graphene oxide 30, active material 100, functional material 15, conductive material 20, bonding material 20. The functional material is 60% lithium iron nitrate solution. The positive electrode material is lithium cobalt oxide. The conductive agent is flake graphite
[0015] The preparation method of the high-efficiency graphene-coated lithium cobalt oxide cathode material comprises the following steps:
[0016] (1) Take graphite and sodium nitrate, put them in a certain amount of concentrated sulfuric acid in an ice bath at a mass ratio of 2:1, add potassium percobaltate 3 times the mass of the graphite under stirring, mix well, and control the temperature to low Stir at 20°C for about 1 h, then increase the temperature to 32-38°C for 2 h, slowly add quantitative deionized water dropwise, stir well, a...
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