Modified graphene coated lithium manganate 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 manganese resources, and high prices, and achieve extended storage time, improved self-discharge, and low cost Effect
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[0011] The modified graphene-coated lithium manganate cathode material is prepared in parts by weight from the following components according to the ratio shown: graphene oxide 60, lithium manganate 30, 45% lithium iron nitrate solution 18, scale Graphite 1, bonding material 1. .
[0012] The preparation method of the modified graphene-coated lithium manganate cathode material comprises the following steps:
[0013] (1) Get graphite and sodium nitrate, place a certain amount of ice-bathed concentrated sulfuric acid in a mass ratio of 2:1, add potassium permanganate 3 times the quality of graphite under stirring, mix well, and control the temperature to be low Stir at 20°C for about 1h, then increase the temperature to 32-38°C for 2h, slowly add quantitative deionized water dropwise, stir well, add hydrogen peroxide to terminate the reaction when the system temperature drops, filter, wash, dry; heat and stir In the process of adding a certain amount of uniformly dispersed car...
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