Nitrogen-doped porous carbon ball/manganic manganous oxide nanometer composite electrode material and preparation method thereof
A technology of trimanganese tetraoxide nanometer and nitrogen-doped porous carbon, which is applied in battery electrodes, nanotechnology, nanotechnology, etc., to achieve the effects of strong operability, less stringent equipment requirements, and excellent high-rate discharge performance
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Embodiment 1
[0030] After adding 0.36g of cetyltrimethylammonium bromide to 180ml of deionized water and absolute ethanol mixed solvent with a volume ratio of 1.9:1 to dissolve, continue to add 3ml of tetraethyl orthosilicate and 3ml of ammonia water (NH 3The mass percentage is 25~28%), stirring for 10h; dissolving carboxymethyl chitosan in deionized water and stirring for 10h to form 100ml of a solution with a mass percentage of 5%, and then mixing with the above solution for 24h; then evaporating the mixed solution solvent , and put it into a drying oven at 100°C for curing treatment for 20 hours. After the solid material was ground, it was carbonized under the protection of high-purity nitrogen. The carbonization temperature was 800°C, the carbonization time was 2 hours, and the heating rate was 5°C / min; The product was placed in a 10% hydrofluoric acid solution by mass and stirred for 24 hours, washed three times with deionized water, dried at 80°C to obtain nitrogen-doped porous carbon...
Embodiment 2
[0034] Add 0.32g of cetyltrimethylammonium bromide to 160ml of a mixed solvent of deionized water and absolute ethanol with a volume ratio of 2.0:1 to dissolve, then continue to add 2ml of ethyl orthosilicate and 2ml of ammonia water (NH 3 The mass percentage is 25~28%), stirring for 8h; dissolving carboxylated chitosan in deionized water and stirring for 8h to form 100ml of a solution with a mass percentage of 3%, and then mixing with the above solution for 18h; then evaporating the mixed solution solvent, And put it in a drying oven at 80°C for 18 hours, and then grind the solid material and carry out carbonization treatment under the protection of high-purity nitrogen. The carbonization temperature is 700°C, the carbonization time is 2h, and the heating rate is 5°C / min; The product was placed in an 8% hydrofluoric acid solution by mass and stirred for 18 h, washed twice with deionized water, and dried at 80°C to obtain nitrogen-doped porous carbon spheres.
[0035] Weigh 70...
Embodiment 3
[0038] After adding 0.4g of cetyltrimethylammonium bromide to 200ml of a mixed solvent of deionized water and absolute ethanol with a volume ratio of 2.2:1 to dissolve, continue to add 4ml of tetraethyl orthosilicate and 4ml of ammonia water (NH 3 The mass percentage is 25~28%), stirred for 8h; 600,000 molecular weight chitosan was dissolved in acetic acid aqueous solution with a volume concentration of 3% to form 120ml of a solution with a mass percentage of 2%, and then mixed with the above solution for 24h; then the The solvent of the mixed solution was evaporated, and put into a drying oven at 120°C for solidification treatment for 24 hours. After the solid material was ground, it was carbonized under the protection of high-purity nitrogen. The carbonization temperature was 850°C, the carbonization time was 3 hours, and the heating rate was 5°C / minutes; the carbonized product was placed in a 6% hydrofluoric acid solution and stirred for 24 hours, then washed three times wi...
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