Method for preparing lithium ion battery active cathode material doped with composite carbon
A technology for lithium-ion batteries and negative electrode active materials, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of inability to break through compaction and compaction density, and achieve high specific capacity, low rebound, and long cycle life Effect
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[0036] Below in conjunction with embodiment the present invention is described in further detail.
[0037] Comparative implementation example 1
[0038] (1) Purify petroleum coke, pitch coke, and coal tar pitch coke to remove useless impurities;
[0039] (2) Add petroleum coke, pitch coke, and coal tar pitch coke materials in a ratio of 50:30:20 to 20-40% of medium-temperature asphalt, and take the coke weight as the basis, stir for 10-50 minutes, press it through a hydraulic press, and then press it at 1200-2000 Roasting at 1400°C for 1 to 2 days to obtain the basic material;
[0040] (3) Add 20-40% of the obtained base material into medium-temperature asphalt as an impregnating agent, and take the weight of the base material as a basis, carry out the first high-pressure dip-baking coating, the atmospheric pressure is 8-10kPa, and the soaking time is 7-9 hours. Then carry out the first high-temperature graphitization at a temperature of 2400-2600°C for 7-15 days to obtain t...
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