Method for preparing active carbon fiber material with energy storage characteristic from polyacrylonitrile-based pre-oxidized fiber and application of active carbon fiber material
A technology of polyacrylonitrile-based pre-oxidized filaments and activated carbon fibers, which is applied in the fields of fiber chemical characteristics, textiles and papermaking, and hybrid capacitor electrodes. It can solve the problems of many influencing factors, long process routes, and increased energy consumption. Short, improve the preparation efficiency, reduce the effect of energy consumption
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Embodiment 1
[0021] (1) Wash the polyacrylonitrile-based pre-oxidized silk (commercially available) with water, and dry it at 120°C for 24 hours;
[0022] (2) Put the pre-oxidized wire dried in the above step (1) in a nickel crucible, add potassium hydroxide solid according to the carbon-base ratio (mass ratio) 1:2, add a certain amount of water and mix evenly, dry, and control the temperature rise Speed at 5°C / min, activate at 800°C for 1 hour, cool naturally to room temperature, and obtain the activated product;
[0023] (3) Soak the activated product obtained in the above step (2) in hot water at 100°C, filter, wash until neutral, and dry in a vacuum oven at 60°C for 24 hours to obtain activated carbon fiber material with a specific surface area of 2503m 2 / g, the average pore diameter is 2.65nm, and the mesoporosity is 60%, and it is ground into powder to obtain activated carbon fiber materials that can be used for electrochemical capacitors.
[0024] (4) Disperse the powdered act...
Embodiment 2
[0027] (1) Wash the polyacrylonitrile-based pre-oxidized silk (commercially available) with water, and dry it at 100°C for 24 hours;
[0028] (2) Put the pre-oxidized wire dried in the above step (1) in a nickel crucible, add sodium hydroxide solid according to the carbon-base ratio (mass ratio) 1:3, add a certain amount of water and mix evenly, dry, and control the temperature rise The speed is 10°C / min, activate at 900°C for 1 hour, and cool naturally to room temperature to obtain the activated product;
[0029] (3) Soak the activated product obtained in the above step (2) in hot water at 90°C, filter, wash until neutral, and dry in a vacuum oven at 65°C for 24 hours to obtain activated carbon fiber material with a specific surface area of 2238m 2 / g, the average pore diameter is 2.46nm, and the mesoporosity is 51%, and it is ground into powder to obtain activated carbon fiber materials that can be used for electrochemical capacitors.
[0030] (4) Disperse the powdered ac...
Embodiment 3
[0033] (1) Wash the polyacrylonitrile-based pre-oxidized silk (commercially available) with water, and dry it at 80°C for 24 hours;
[0034] (2) Put the pre-oxidized wire dried in the above step (1) in a nickel crucible, add potassium hydroxide solid according to the carbon-base ratio (mass ratio) 1:3, add a certain amount of water and mix evenly, dry, and control the temperature rise The speed is 8°C / min, activated at 850°C for 0.5h, and naturally cooled to room temperature to obtain the activated product;
[0035] (3) Soak the activated product obtained in the above step (2) in hot water at 70°C, filter, wash until neutral, and dry in a vacuum oven at 75°C for 24 hours to obtain activated carbon fiber material with a specific surface area of 1249m 2 / g, the average pore diameter is 1.86nm, and the mesoporosity is 35%, and it is ground into powder to obtain activated carbon fiber materials that can be used for electrochemical capacitors.
[0036] (4) Disperse the powdered ...
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