Preparation method of novel carbon silicon composite material
A composite material and carbon-silicon technology, which is applied in the field of preparation of new carbon-silicon composite materials, can solve problems such as low capacity and unfavorable high-capacity lithium-ion batteries, and achieve the effects of wide sources, sustainable development, and cheap raw materials
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Embodiment 1
[0028] A method for preparing a novel carbon-silicon composite material, comprising the steps of:
[0029] S1. Pretreatment: first wash the betel nut shells with deionized water and cut them into pieces, put them in 1mol / L sodium hydroxide solution, soak in a water bath at 80°C for 10 hours, then put them in 1mol / L dilute Boil in hydrochloric acid solution until the betel nut shell is completely swollen, then wash the betel nut shell and then vacuum dry it for later use at a temperature of 55°C;
[0030] S2. Preparation of betel nut shell powder: put the treated betel nut shell into a tubular resistance furnace, carbonize for 1-2 hours under the protection of nitrogen, the carbonization temperature is 850-1000°C, and the heating rate is 1-10°C / min; The carbonized betel nut shells are put into a mortar and repeatedly ground into betel nut shell powder;
[0031] S3. Preparation of carbon-silicon composite material: mix betel nut shell powder, nano-silicon powder, artificial gra...
Embodiment 2
[0033] Except that betel nut shell powder, nano-silicon powder, artificial graphite powder and alcohol are mixed in a mass ratio of 2:4:1:0.8 in step S3, the others are the same as in Example 1.
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