Method for preparing vanadium nitride
A technology of vanadium nitride and nitride, which is applied in the field of preparation of supercapacitor materials, can solve the problems of large particle size, unsatisfactory catalytic performance and electrochemical performance, and achieve high cost performance, outstanding charge and discharge performance, and equipment requirements not high effect
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Example Embodiment
[0022] Example 1
[0023] Add 2 g of vanadium pentoxide to a beaker containing 100 ml of distilled water, add 2 mol / L hydrochloric acid dropwise while stirring until the dissolution is complete, add 40 g of melamine for high-speed dispersion, and dry at 60°C for 5 hours to form a block The material is ball milled. Load the obtained powder into a porcelain ark, and calcine in a tube furnace with nitrogen protection and programmed temperature control. The temperature rise rate is 5℃ / min to 850℃, the temperature is maintained for 2 hours, and the target is obtained after cooling to room temperature. product. After being passivated in 0.1% oxygen-containing argon at room temperature for 2 hours, it can be stored stably in the air for a long time.
[0024] Most of the above-mentioned target products have a particle size of less than 15nm and have good conductivity. They are used as active materials for supercapacitor electrodes to make working electrodes, and simulated supercapacitor ...
Example Embodiment
[0025] Example 2
[0026] Add 2 g of ammonium polyvanadate to a beaker containing 100 ml of distilled water, stir until the dissolution is complete, add 10 g of urea for high-speed dispersion, dry at 80°C for 3 hours, and ball mill the obtained bulk material. Load the obtained powder into a porcelain ark, and then calcinate in a tube furnace with ammonia protection and programmed temperature control. The temperature rise rate is 5℃ / min to 800℃, the temperature is kept for 3 hours, and it is cooled to room temperature. Target product. After being passivated in 0.1% oxygen-containing argon at room temperature for 2 hours, it can be stored stably in the air for a long time.
[0027] Most of the above-mentioned target products have a particle size of less than 10nm and have good conductivity. They are used as active materials for supercapacitor electrodes to make working electrodes, and simulated supercapacitor units are assembled for cyclic voltammetry and constant current charge and...
Example Embodiment
[0028] Example 3
[0029] Add 2 g of vanadium sulfide to a beaker containing 100 ml of distilled water, add ammonia water dropwise while stirring, control the pH to 12 until the dissolution is complete, add 30 g of cyanamide to disperse at a high speed, and dry at 100°C for 2 hours. Perform ball milling. Load the obtained powder into a porcelain ark, and calcine in a tube furnace with nitrogen protection and programmed temperature control. The temperature rise rate is 5℃ / min to 900℃, the temperature is kept for 5 hours, and the target is obtained after cooling to room temperature. product. It can be stored stably in the air for a long time after being passivated at room temperature in argon containing 0.1% oxygen for 2 hours.
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Abstract
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