High-efficiency sulfur/charcoal-coated lithium cobalt oxide positive electrode material and preparation method thereof
A positive electrode material, lithium cobalt oxide technology, applied in the field of high-efficiency sulfur/carbon-coated lithium cobalt oxide positive electrode material and its preparation, can solve the problems of restricting development prospects, lack of cobalt resources, toxicity, etc., and achieve extended storage time, Improved self-discharge, the effect of a simple method
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[0011] The high-efficiency sulfur / carbon-coated lithium cobaltate positive electrode material is prepared by the following components according to the ratio shown in parts by weight, sulfur / carbon composite material 50, lithium cobaltate 65, 45% lithium iron nitrate solution 20 , flake graphite 13, bonding material 13. The 45% lithium iron nitrate solution is a 60% lithium iron nitrate solution. The positive electrode material is lithium cobalt oxide. The conductive agent is flake graphite.
[0012] The preparation method of the high-efficiency sulfur / carbon-coated lithium cobaltate cathode material comprises the following steps:
[0013] (1) Put the carbon material and sublimated sulfur or sulfur powder into a zirconia or agate ball mill jar according to the above weight ratio, inject the ball mill jar into a high-purity inert gas in the glove box, and place it on a planetary ball mill for 5 hours. The ball milling speed is 500r / min, the mass ratio of elemental sulfur and ...
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