Preparation method of carbon/graphite composite anode material
A technology of composite materials and negative electrode materials, applied in the field of preparation of carbon/graphite composite negative electrode materials, can solve the problems of increased irreversible capacity, decreased cycle stability, co-intercalation of solvent molecules, etc., so as to avoid the decrease of cycle performance and achieve excellent product performance. , the effect of high capacity for the first time
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Embodiment 1
[0029] Ingredients: ≤1mm microcrystalline graphite 5%, ≤0.075mm calcined petroleum coke 28%, 1~4mm calcined petroleum coke 15%, 4~l0mm electric calcined anthracite 10%, 10-16mm electric calcined anthracite 5%, 10-16mm Calcined pitch coke 15%, acetylene carbon black 2%, coal pitch 20%. Add 1% of the raw material weight T300PAN chopped carbon fiber (diameter 12μm, length 10mm);
[0030] (1) Ingredients and kneading, first add carbon black, natural graphite, calcined petroleum coke powder, calcined petroleum coke, electric calcined anthracite and calcined pitch coke into the kneader. The dry mixing time is 35 minutes and the dry mixing temperature is 120°C; When the dry mixing temperature reaches the set time and temperature, add 175℃ coal tar pitch for wet mixing, the wet mixing time is 30 minutes, and the kneading temperature is 160℃ to form a composite plastic body;
[0031] (2) Roasting, the green body is put into a roasting furnace and roasted at 1100°C to make carbon material; ...
Embodiment 2
[0035] Ingredients: ≤1mm microcrystalline graphite 5%, ≤0.075mm calcined petroleum coke 28%, 1~4mm calcined petroleum coke 15%, 4~l0mm electric calcined anthracite 10%, 10-16mm electric calcined anthracite 5%, 10-16mm Calcined pitch coke 15%, acetylene carbon black 2%, coal pitch 20%. Plus 1% T300PAN chopped carbon fiber (diameter 12μm, length 10mm);
[0036] (1) Ingredients and kneading, first add carbon black, natural graphite, calcined petroleum coke powder, calcined petroleum coke, electric calcined anthracite and calcined pitch coke into the kneader, and then add chopped carbon fiber for dry mixing after an interval of 5-6 minutes , The dry mixing time is 35 minutes, and the dry mixing temperature is 120℃; when the dry mixing temperature reaches the set time and temperature, add 175℃ coal pitch for wet mixing, the wet mixing time is 30 minutes, and the mixing temperature is 160℃ , Forming a composite plastic body;
[0037] (2) Roasting, the green body is put into a roasting ...
Embodiment 3
[0041] The ingredients of Example 2 are unchanged, and 2% T300PAN chopped carbon fiber (diameter 12μm, length 10mm) is added. The process is the same as that of Example 1.
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