Nickel nitride@nitrogen doped porous carbon sphere material and preparation and application thereof in lithium-sulfur battery
A nitrogen-doped porous carbon and lithium-sulfur battery technology, which is applied in lithium batteries, battery electrodes, non-aqueous electrolyte batteries, etc., can solve the problems of unfavorable practical promotion of lithium-sulfur batteries, small specific surface area of catalysts, and insufficient reaction interface. Achieve the effects of inhibiting the shuttle effect, good electrochemical performance, and excellent capacity
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Embodiment 1
[0071] 5 kg of starch, 5 kg of 50nm SiO 2 Template dispersion, 80 grams of nickel acetate and 50 grams of sodium dodecylsulfonate were added to 10L of deionized water, stirred at 80°C for 5 hours to prepare a uniform spray slurry, and the slurry was added to the spray pyrolysis via a peristaltic pump After the system, under the ammonia atmosphere, set the spray volume through the spray system to 5mL / min, and the atomization pressure to 5MPa. The spray solution is sprayed and pyrolyzed in the high-temperature pyrolysis furnace at 1000°C, and the spray pyrolysis products are collected. The product was mixed with 5 L of 5 mol / l sodium hydroxide solution, and the silica template was washed away in a reaction kettle at 80 degrees Celsius. The material is a uniform spherical particle with a particle size of about 5 microns and a pore volume of 2.18 cm 3 / g, the specific surface area is 1668m 2 / g, from figure 1 It can be seen that the inside of the spherical particle is composed ...
Embodiment 2
[0075] 5 kg of starch, 5 kg of 500nm SiO 2 Template dispersion, 80 grams of nickel acetate and 50 grams of sodium dodecylsulfonate were added to 10L of deionized water, stirred at 80°C for 5 hours to prepare a uniform spray slurry, and the slurry was added to the spray pyrolysis via a peristaltic pump After the system, under the ammonia atmosphere, set the spray volume through the spray system to 50mL / min, and the atomization pressure to 35MPa. The spray solution is sprayed and pyrolyzed in the high-temperature pyrolysis furnace at 1000°C, and the spray pyrolysis products are collected. The product was mixed with 5 L of 5 mol / l sodium hydroxide solution, and the silica template was washed away in a reaction kettle at 80 degrees Celsius. The material is a uniform spherical particle with a particle size of about 25 microns, and a pore volume of 2.21 cm 3 / g, the specific surface area is 1748m 2 / g, the interior of spherical particles is composed of hollow carbon with a diamete...
Embodiment 3
[0078] 5 kg of starch, 5 kg of 150nm SiO 2Template dispersion, 400 g of nickel acetate and 50 g of sodium dodecylsulfonate were added to 10 L of deionized water, stirred at 80°C for 5 hours to prepare a uniform spray slurry, and the slurry was added to the spray pyrolysis via a peristaltic pump After the system, under the ammonia atmosphere, set the spray volume through the spray system to 20mL / min, and the atomization pressure to 20MPa. The spray solution is sprayed and pyrolyzed in the high-temperature pyrolysis furnace at 1000°C, and the spray pyrolysis products are collected. The product was mixed with 5 L of 5 mol / l sodium hydroxide solution, and the silica template was washed away in a reaction kettle at 80 degrees Celsius. The material is uniform spherical particles with a particle size of about 10 microns and a pore volume of 1.64 cm 3 / g, the specific surface area is 1356m 2 / g, the interior of the spherical particle is composed of hollow carbon with a diameter of a...
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