Modified sulfur/charcoal coated lithium nickelate positive electrode material and preparation method thereof
A cathode material, lithium nickelate technology, applied in the field of modified sulfur/carbon-coated lithium nickelate cathode material and its preparation, can solve problems such as restricting development prospects, lack of nickel resources, toxicity, etc., and prolong storage time , improve self-discharge, the effect of simple method
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[0011] The modified sulfur / carbon-coated lithium nickelate positive electrode material is prepared by the following components according to the ratio shown in parts by weight, sulfur / carbon composite material 40, lithium nickelate 50, 45% lithium iron nitrate solution 20. Flake graphite 5. Bonding material 5. The 45% lithium iron nitrate solution is a 60% lithium iron nitrate solution. The positive electrode material is lithium nickelate. The conductive agent is flake graphite
[0012] The preparation method of the modified sulfur / carbon-coated lithium nickelate 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 carbon is 1:2~3:2; th...
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