Graphite negative electrode material of lithium-ion battery and preparation method of graphite negative electrode material
A lithium-ion battery and graphite negative electrode technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of cycle performance and low primary charge capacity, and achieve good cycle performance, excellent cycle performance, and increased cycle performance.
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Embodiment 1
[0026] The preparation method of the present embodiment comprises the following steps:
[0027] (1) Mix an artificial graphite raw material with a certain amount of binder and catalyst SiC (content ≥ 92%) at a ratio of 100:6:5. When mixing, it is required to feed materials in a certain order according to the specific gravity of the material , Mixing time 30 ~ 60min.
[0028] (2) In an inert gas, put the material mixed in step (1) into a low-temperature surface modification reaction kettle, and stir while heating up. The frequency of stirring should make the material even, generally controlled at 28-40r / min , The heating time is 180-240min, the temperature is raised to 500-650°C, and the temperature is kept constant for 180-260min to obtain the clad body.
[0029] (3) The clad body in step (2) is subjected to graphitization treatment at 2000-2800° C. for 50-70 hours.
[0030] (4) Put the graphitized coated body and a certain amount of binder in the step (3) into the fusion eq...
Embodiment 2
[0033] The preparation method of the present embodiment comprises the following steps:
[0034] (1) Mix an artificial graphite raw material with a certain amount of binder and catalyst SiC (content ≥ 92%) at a ratio of 100:10:5. When mixing, it is required to feed materials in a certain order according to the specific gravity of the material , Mixing time 30 ~ 60min.
[0035] (2) In an inert gas, put the material mixed in step (1) into a low-temperature surface modification reaction kettle, and stir while heating up. The frequency of stirring should make the material even, generally controlled at 28-40r / min , The heating time is 180-240min, the temperature is raised to 500-650°C, and the temperature is kept constant for 180-260min to obtain the clad body.
[0036] (3) The clad body in step (2) is subjected to graphitization treatment at 2000-2800° C. for 50-70 hours.
[0037] (4) Put the graphitized coated body and a certain amount of binder in the step (3) into the fusion e...
Embodiment 3
[0040] The preparation method of the present embodiment comprises the following steps:
[0041] (1) Mix an artificial graphite raw material with a certain amount of binder and catalyst SiC (content ≥ 92%) at a ratio of 100:12:5. When mixing, it is required to feed materials in a certain order according to the specific gravity of the material , Mixing time 30 ~ 60min.
[0042] (2) In an inert gas, put the material mixed in step (1) into a low-temperature surface modification reaction kettle, and stir while heating up. The frequency of stirring should make the material even, generally controlled at 28-40r / min , The heating time is 180-240min, the temperature is raised to 500-650°C, and the temperature is kept constant for 180-260min to obtain the clad body.
[0043] (3) The clad body in step (2) is subjected to graphitization treatment at 2000-2800° C. for 50-70 hours.
[0044] (4) Put the graphitized coated body and a certain amount of binder in the step (3) into the fusion e...
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