Preparation method and application of porous silicon oxide/carbon composite negative electrode material
A technology of silicon oxide and negative electrode materials, which is applied in the direction of battery electrodes, electrochemical generators, electrical components, etc., can solve problems not involved in the preparation of silicon/carbon composite negative electrode materials, so as to alleviate the problem of volume change and have strong repeatability , the effect of high safety factor
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Embodiment 1
[0063] The preparation method of embodiment 1 bamboo shoot shell silicon carbon material
[0064] A preparation method of bamboo shoot shell silicon carbon material, comprising the following steps:
[0065] Get 20 grams of dry bamboo shoot shells and sieve after pulverizing, wherein the content of silicon in the dry bamboo shoot shells is 15%; take 10 grams of 70 mesh bamboo shoot shell powder and disperse them in deionized water for washing and drying, and evenly add 2mol / L hydrochloric acid solution, stirred in 80°C water bath for 9 hours, cooled, filtered and washed, and dried to obtain the cleaned powder for later use; then weighed 10 grams of pickled bamboo shoot shell powder and milled at a uniform speed of 500r / min in a planetary ball mill for 11 hours Obtain bamboo shoot shell powder after small particle ball milling;
[0066] Place the above-mentioned small-grain bamboo shoot shell powder in an air atmosphere, take it out after calcination at a rate of 10°C / min to 4...
Embodiment 2
[0068] The preparation method of embodiment 2 bamboo leaf silicon carbon material
[0069] A preparation method of bamboo leaf silicon carbon material, comprising the following steps:
[0070] Get 20 grams of dried yellow bamboo leaves and sieve after pulverizing with a pulverizer, wherein the content of silicon in the dried yellow bamboo leaves is 5%; take 10 grams of 100 mesh bamboo leaf powder and disperse them in deionized water for washing and drying, and evenly add 2mol / L hydrochloric acid solution, stirred in 80°C water bath for 8 hours, cooled, filtered and washed, and dried to obtain the cleaned powder for later use; 10 grams of the above acid-washed bamboo leaf powder were weighed and placed in a planetary ball mill at a uniform speed of 300r / min for 10 minutes. Bamboo leaf powder is obtained after small particle ball milling;
[0071] Place the above-mentioned small-grained bamboo leaf powder in an air atmosphere, heat it up to 400°C for 20 minutes at a rate of 8°...
Embodiment 3
[0073] The preparation method of embodiment 3 reed wadding silicon carbon material
[0074] A preparation method of reed wadding silicon carbon material, comprising the following steps:
[0075] Take 20 grams of dry reed flocs and sieve after pulverizing with a pulverizer, wherein the content of silicon in the dried reed flocs is 20%; weigh 10 grams of 120-mesh reed flocs powder, disperse them in deionized water, wash and dry, and evenly add 2mol / L hydrochloric acid solution, stirred in 80°C water bath for 10 hours, cooled, filtered and washed, dried to obtain the cleaned powder for later use; then weighed 10 grams of pickled reed wadding powder and milled at a uniform speed of 700r / min in a planetary ball mill for 12 hours Obtain reed floc powder after ball milling of small particles;
[0076] Place the above-mentioned small-grained reed floc powder in an air atmosphere, heat it up to 500°C at a rate of 12°C / min and calcinate it for 30 minutes, take it out, take 5g of the s...
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