CoS@Ni(OH)2 composite material and preparation method thereof
A composite material and system technology, used in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrodes, etc., can solve the problems of small specific surface area, large electrode material size, low specific capacitance, etc., and achieve the effect of simple operation and easy preparation
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Embodiment 1
[0034] In the first step, a solution of 3 mmol of cobalt nitrate hexahydrate dissolved in 60 ml of methanol and a solution of 12 mmol of 2-methylimidazole dissolved in 60 ml of methanol were mixed, stirred for 2 hours, left standing at room temperature for 24 hours, centrifuged, washed and filtered, and then dried.
[0035] In the second step, 150 mg of the sample obtained in the first step is ultrasonically dispersed in 30 ml of ethanol solution, 200 mg of thioacetamide is added, and stirred for 1 h;
[0036] In the third step, the mixed solution in the second step is transferred to an autoclave and kept at 120°C for 4 hours;
[0037] The fourth step is to take the kettle, cool it naturally, wash and dry the product by centrifugation, and set the argon atmosphere at 3°C min -1 The heating rate was increased to 600 ° C for 3 hours at a constant temperature;
[0038]In the fifth step, 0.25mol L -1 Potassium persulfate solution and 1mol L -1 Mix the nickel sulfate hexahydra...
Embodiment 2
[0042] In the first step, a solution of 3 mmol of cobalt nitrate hexahydrate dissolved in 60 ml of methanol and a solution of 12 mmol of 2-methylimidazole dissolved in 60 ml of methanol were mixed, stirred for 2 hours, left standing at room temperature for 24 hours, centrifuged, washed and filtered, and then dried.
[0043] In the second step, 150 mg of the sample obtained in the first step is ultrasonically dispersed in 30 ml of ethanol solution, 200 mg of thioacetamide is added, and stirred for 1 h;
[0044] In the third step, the mixed solution in the second step is transferred to an autoclave and kept at 120°C for 4 hours;
[0045] The fourth step is to take the kettle, cool it naturally, wash and dry the product by centrifugation, and set the argon atmosphere at 3°C min -1 The heating rate was increased to 600 ° C for 3 hours at a constant temperature;
[0046] In the fifth step, 0.25mol L -1 Potassium persulfate solution and 1mol L -1 Mix the nickel sulfate hexahydr...
Embodiment 3
[0050] In the first step, a solution of 3 mmol of cobalt nitrate hexahydrate dissolved in 60 ml of methanol and a solution of 12 mmol of 2-methylimidazole dissolved in 60 ml of methanol were mixed, stirred for 2 hours, left standing at room temperature for 24 hours, centrifuged, washed and filtered, and then dried.
[0051] In the second step, 150 mg of the sample obtained in the first step is ultrasonically dispersed in 30 ml of ethanol solution, 200 mg of thioacetamide is added, and stirred for 1 h;
[0052] In the third step, the mixed solution in the second step is transferred to an autoclave and kept at 120°C for 4 hours;
[0053] The fourth step is to take the kettle, cool it naturally, wash and dry the product by centrifugation, and set the argon atmosphere at 3°C min -1 The heating rate was increased to 600 ° C for 3 hours at a constant temperature;
[0054] In the fifth step, 0.25mol L -1 Potassium persulfate solution and 1mol L -1 Mix the nickel sulfate hexahydr...
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