Negative electrode material, preparation method and application thereof
A negative electrode material and gas phase technology, applied to the negative electrode material and its preparation field in lithium-ion power batteries, can solve the problems of high energy density incompatibility, fast charging, etc., and achieve the effect of solving high energy density incompatibility and fast charging
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Embodiment 1
[0052] This embodiment provides a negative electrode material, and the negative electrode material is a graphite / carbon nanofiber composite material.
[0053] The preparation method of the negative electrode material is as follows:
[0054] (1) Pulverize the petroleum coke to obtain a single particle with a median particle size of 13 μm, and then perform graphitization treatment at 2400° C. for 12 hours to obtain artificial graphite;
[0055] (2) Using copper and nickel as catalysts, the artificial graphite and methane described in step (1) are heated up to 650° C. at a heating rate of 5° C. / min under a helium atmosphere, and are deposited by chemical vapor deposition for 3 hours. The passage of methane The inflow rate is 600mL / min. After the deposition is completed and cooled to room temperature, it is washed with hydrochloric acid (1mol / L) solution to obtain the negative electrode material, wherein the mass ratio of catalyst (copper and nickel) to artificial graphite is 1:15...
Embodiment 2
[0058] This embodiment provides a negative electrode material, and the negative electrode material is a graphite / carbon nanofiber composite material.
[0059] The preparation method of the negative electrode material is as follows:
[0060] (1) Pulverize petroleum coke to obtain a single particle with a median particle size of 20 μm, and then perform graphitization treatment at 2800° C. for 10 hours to obtain artificial graphite;
[0061] (2) Using gold as a catalyst, the artificial graphite and acetylene described in step (1) are heated up to 800°C at a heating rate of 10°C / min under a helium atmosphere, and are deposited by chemical vapor deposition for 1h. It is 500mL / min, after the deposition finishes cooling to room temperature, wash with sulfuric acid (1mol / L) solution, obtain described anode material, wherein: the mass ratio of catalyst (gold) and artificial graphite is 1:10.
Embodiment 3
[0063] This embodiment provides a negative electrode material, and the negative electrode material is a graphite / carbon nanofiber composite material.
[0064] The preparation method of the negative electrode material is as follows:
[0065] (1) Pulverize petroleum coke to obtain single particles with a median particle size of 7 μm, and then perform graphitization treatment at 2000° C. for 15 hours to obtain artificial graphite;
[0066] (2) Using palladium and silver as catalysts, the artificial graphite and methane described in step (1) are heated up to 500° C. with a heating rate of 8° C. / min under an argon atmosphere, and are deposited by chemical vapor deposition for 6 hours. The passage of methane The inflow rate is 800mL / min, after the deposition is completed and cooled to room temperature, it is washed with nitric acid (1mol / L) solution to obtain the negative electrode material, wherein the mass ratio of the catalyst (palladium and silver) to the artificial graphite is ...
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Abstract
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