Sensitive plant-like carbon-loaded sulfur composite material with bionic structure and preparation method thereof as well as lithium-sulfur battery cathode and battery
A technology of composite materials and mimosa, applied in battery electrodes, lithium batteries, positive electrodes, etc., can solve the problems of easy solubility in organic electrolyte, poor conductivity of lithium sulfide, poor cycle performance, etc., to facilitate electron transmission, Improving battery performance and alleviating volume expansion
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Embodiment 1
[0052] A preparation method of a biomimetic structure mimosa-like carbon-supported sulfur composite material, comprising the following steps:
[0053]1) Hydrothermal process: 0.064g of cadmium chloride and 0.053g of thiourea were dissolved in 35ml of water, stirred and mixed evenly. After adding 0.1 ml of dimethyl sulfoxide and stirring for 10 min, the mixed solution was put into an oven and reacted at a constant temperature of 150° C. for 6 hours. After the reaction, the precipitate was collected, centrifuged, washed, and vacuum-dried at 30°C for 18 hours to obtain a cadmium sulfide material;
[0054] 2) Composite process: take 0.1g of cadmium sulfide prepared in step 1) and disperse it in 50ml of deionized water, take 0.6g of tris (Tris), adjust the pH to 6, add 40mg of dopamine hydrochloride, react for 12 hours, and react After the end, the product was taken out, washed by centrifugal precipitation, and vacuum-dried at 35° C. for 20 hours to obtain the cadmium sulfide / carb...
Embodiment 2
[0059] A preparation method of a biomimetic structure mimosa-like carbon-supported sulfur composite material, comprising the following steps:
[0060] 1) Hydrothermal process: 0.128g of cadmium chloride and 0.06g of thiourea were respectively dissolved in 35ml of water, stirred and mixed evenly. After adding 0.12 ml of dimethyl sulfoxide and stirring for 10 min, the mixed solution was put into an oven and reacted at a constant temperature of 160° C. for 7 hours. After the reaction, the precipitate was collected, centrifuged, washed, and vacuum-dried at 40°C for 12 hours to obtain a cadmium sulfide material;
[0061] 2) Composite process: take 0.1 g of cadmium sulfide prepared in step 1) and disperse it in 50 ml of deionized water, take 0.9 g of tris (Tris), adjust the pH to 7.5, and add 50 mg of dopamine hydrochloride. The reaction was carried out for 18 hours. After the reaction, the product was taken out, washed by centrifugal precipitation, and vacuum-dried at 45° C. for 1...
Embodiment 3
[0066] A preparation method of a biomimetic structure mimosa-like carbon-supported sulfur composite material, comprising the following steps:
[0067] 1) Hydrothermal process: 0.24g of cadmium chloride and 0.07g of thiourea were respectively dissolved in 35ml of water, stirred and mixed evenly. After adding 0.15 ml of dimethyl sulfoxide and stirring for 10 min, the mixed solution was put into an oven and reacted at a constant temperature of 170° C. for 8 hours. After the reaction, the precipitate was collected, centrifuged, washed, and vacuum-dried at 60° C. for 6 hours to obtain a cadmium sulfide material;
[0068] 2) Composite process: take 0.1 g of cadmium sulfide prepared in step 1) and disperse it in 50 ml of deionized water, take 1.2 g of tris (Tris), adjust the pH to 8, and add 60 mg of dopamine hydrochloride. The reaction was carried out for 24 hours. After the reaction, the product was taken out, washed by centrifugal precipitation, and vacuum-dried at 55° C. for 6 h...
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