A nitrogen-doped carbon-coated two-phase staggered distribution type nickel-cobalt double metal selenide electrode material and its preparation method
A nitrogen-doped carbon, staggered distribution technology, applied in battery electrodes, circuits, electrical components, etc., can solve problems such as restricting the energy storage performance of transition metal selenide-based electrode materials, and achieve the effect of improving electrochemical energy storage performance.
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Embodiment 1
[0025] A method for preparing a nitrogen-doped carbon-coated two-phase staggered distribution type nickel-cobalt double metal selenide electrode material, the specific steps are:
[0026] (1) Weigh 232.4 mg of nickel nitrate, 232.4 mg of cobalt nitrate, 1 g of polyvinylpyrrolidone and 150 mg of trimesic acid into 30 mL of N,N-dimethylformamide, dissolve the above mixture by ultrasonic Transfer to a reaction kettle and place in a blast drying oven at 150 °C for 6 h of solvothermal reaction, then cool it down to room temperature naturally, wash it with absolute ethanol for several times, and finally dry the washed product;
[0027] (2) Weigh 100 mg of the centrifuged-dried product of step (1) and 200 mg of melamine and place them in two porcelain boats, and then place them in an argon-hydrogen protected tube furnace for carbonization and nitrogen doping treatment. The temperature is 450 ℃, the treatment time is 2 h, and finally the nitrogen-doped carbon-coated nickel-cobalt bime...
Embodiment 2
[0030] A method for preparing a nitrogen-doped carbon-coated two-phase staggered distribution type nickel-cobalt double metal selenide electrode material, the specific steps are:
[0031] (1) Weigh 155 mg of nickel nitrate, 320 mg of cobalt nitrate, 1 g of polyvinylpyrrolidone and 150 mg of trimesic acid into 30 mL of N,N-dimethylformamide, dissolve the above mixture fully by ultrasonic Transfer it to a reaction kettle and place it in a 150 °C blast drying oven for 6 h of solvothermal reaction, then wait for it to cool down to room temperature naturally, wash it with absolute ethanol for several times, and finally dry the washed product;
[0032] (2) Weigh 100 mg of the centrifugally dried product of step (1) and 200 mg of melamine and place them in two porcelain boats, and then place them in a tube furnace protected by argon and hydrogen for carbonization and nitrogen doping treatment. The temperature is 450 ℃, the treatment time is 2 h, and finally the nitrogen-doped carbon-...
Embodiment 3
[0035] A method for preparing a nitrogen-doped carbon-coated single-phase distribution type nickel-cobalt double metal selenide electrode material, the specific steps are:
[0036] (1) Weigh 155 mg of nickel nitrate, 320 mg of cobalt nitrate, 1 g of polyvinylpyrrolidone and 150 mg of trimesic acid into 30 mL of N,N-dimethylformamide, and dissolve the mixture by ultrasonic Transfer it to a reaction kettle and place it in a 150 °C blast drying oven for 6 h of solvothermal reaction, then wait for it to cool down to room temperature naturally, wash it with absolute ethanol for several times, and finally dry the washed product;
[0037] (2) Weigh 100 mg of the centrifugally dried product of step (1) and 200 mg of melamine and place them in two porcelain boats, and then place them in a tube furnace protected by argon and hydrogen for carbonization and nitrogen doping treatment. The temperature is 450 ℃, the treatment time is 2 h, and finally the nitrogen-doped carbon-coated nickel-c...
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