Polyacrylonitrile fiber loaded cobalt-nickel alloy composite oxygen reduction catalytic material and preparation method thereof
A technology of polyacrylonitrile fiber and cobalt-nickel alloy, which is applied in the direction of structural parts, electrical components, battery electrodes, etc., can solve the problems of fuel cells and metal-air batteries that cannot be commercialized on a large scale, have limited reserves, and lack of resources. Improved electrocatalytic effect, low production cost, and easy follow-up treatment
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[0029] The invention provides a method for preparing an oxygen reduction electrocatalytic material of a polyacrylonitrile fiber-loaded cobalt-nickel alloy composite material, comprising the following steps:
[0030] 1) Dissolve cobalt chloride hexahydrate, ferric chloride hexahydrate and sodium hydroxide in ethylene glycol to obtain a mixed solution; the mass of cobalt chloride hexahydrate and nickel chloride hexahydrate is 1:1~1:2 , the mass ratio of cobalt chloride hexahydrate to sodium hydroxide is 1:3-1:5, and the ratio of cobalt chloride hexahydrate to ethylene glycol is (2-4) g:1L.
[0031] 2) Transfer the mixed solution to an autoclave and put it into an oven, and gradually raise the temperature to 150-180°C and keep it warm for 12-18 hours;
[0032] 3) After the reaction is completed, the solution is washed with ethanol several times, and dried in an oven at 50-80° C. to obtain a cobalt-nickel alloy;
[0033] 4) Dissolving polyacrylonitrile in N,N-dimethylformamide to...
Embodiment 1
[0042] Step 1: Dissolve 0.2g of cobalt chloride hexahydrate, 0.2g of ferric chloride hexahydrate and 0.6g of sodium hydroxide in 50mL of ethylene glycol to obtain a mixed solution.
[0043] Step 2: Transfer the mixed solution to a high-pressure reactor and put it into an oven. The temperature is gradually raised to 150° C. and kept for 18 hours. After the reaction is completed, the solution is washed with ethanol several times, and dried in an oven at 50° C. to obtain a cobalt-nickel alloy.
[0044] Step 3: Dissolve 0.2g of polyacrylonitrile in 5mL of N,N-dimethylformamide to obtain a homogeneous suspension.
[0045] Step 4: Add 0.1 g of the cobalt-nickel alloy obtained in Step 2 to the suspension obtained in Step 3, and stir evenly to form an electrospinning solution.
[0046] Step 5: Electrospinning the electrospinning solution, the spinning voltage is 15kV, and the injection rate of the syringe is 0.8mL h -1, the receiving distance of the drum to collect the electrospun fi...
Embodiment 2
[0048] Step 1: Dissolve 0.2 g of cobalt chloride hexahydrate, 0.4 g of ferric chloride hexahydrate and 1.0 g of sodium hydroxide in 100 mL of ethylene glycol to obtain a mixed solution.
[0049] Step 2: Transfer the mixed solution to a high-pressure reaction kettle and put it into an oven. The temperature is gradually raised to 180° C. and kept for 12 hours. After the reaction is completed, the solution is washed with ethanol several times, and dried in an oven at 80° C. to obtain a cobalt-nickel alloy.
[0050] Step 3: Dissolve 0.4g of polyacrylonitrile in 5mL of N,N-dimethylformamide to obtain a homogeneous suspension.
[0051] Step 4: Add 0.2 g of the cobalt-nickel alloy obtained in Step 2 to the suspension obtained in Step 3, and stir evenly to form an electrospinning liquid.
[0052] Step 5: Electrospinning the electrospinning solution, the spinning voltage is 18kV, and the injecting rate of the syringe is 1.2mL h -1 , the receiving distance of the drum to collect the el...
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