Cobalt hydroxide/rGO/nickel hydroxide sandwich-like flexible electrode material and preparation method thereof
A technology of nickel hydroxide and cobalt hydroxide, which is applied in the manufacture of hybrid/electric double layer capacitors and electrodes of hybrid capacitors, can solve the problems of limited application of electrode materials, low material utilization rate, poor rate performance, etc., and achieve easy industrialization. Promotion, excellent rate performance, and the effect of improving electrical conductivity
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Embodiment 1
[0027] The invention provides a preparation method of cobalt hydroxide / rGO / nickel hydroxide sandwich-shaped flexible electrode material, comprising the following steps:
[0028] S1: First, the carbon fiber cloth is ultrasonically cleaned by acetone, deionized water, and ethanol for 30 minutes, and then dried at 60°C for 25 hours;
[0029] S2: First mix deionized water, nickel chloride hexahydrate, urea, and ammonium fluoride in a mass ratio of 90:3:3:1, stir for 0.5 hours to form a uniform solution, and then pour the solution into the reaction In the kettle, put the carbon fiber cloth dried in step S1 into the reaction kettle, and react at 90°C for 9 hours; after the reaction, wait until the reaction kettle is cooled to room temperature, take out the carbon fiber cloth deposited with nickel hydroxide and wash it several times with deionized water , and finally dried at 60°C for 6 hours;
[0030] S3: Prepare a 0.2mg / L graphene oxide solution, and electrodeposit an rGO layer by...
Embodiment 2
[0035] The invention provides a preparation method of cobalt hydroxide / rGO / nickel hydroxide sandwich-shaped flexible electrode material, comprising the following steps:
[0036] S1: Firstly, the carbon fiber cloth is ultrasonically cleaned by acetone, deionized water, and ethanol for 30 minutes, and then dried at 55°C for 20 hours;
[0037] S2: First mix deionized water, nickel chloride hexahydrate, urea, and ammonium fluoride in a mass ratio of 90:3:3:1, stir for 0.5 hours to form a uniform solution, and then pour the solution into the reaction In the kettle, put the carbon fiber cloth dried in step S1 into the reaction kettle, and react at 100°C for 6 hours; after the reaction, wait for the reaction kettle to cool to room temperature, take out the carbon fiber cloth deposited with nickel hydroxide and wash it several times with deionized water , and finally dried at 60°C for 6 hours;
[0038] S3: Prepare a 0.3mg / L graphene oxide solution, and electrodeposit the rGO layer by...
Embodiment 3
[0043] The invention provides a preparation method of cobalt hydroxide / rGO / nickel hydroxide sandwich-shaped flexible electrode material, comprising the following steps:
[0044] S1: First, the carbon fiber cloth is ultrasonically cleaned by acetone, deionized water, and ethanol for 30 minutes, and then dried at 65°C for 30 hours;
[0045] S2: First mix deionized water, nickel chloride hexahydrate, urea, and ammonium fluoride in a mass ratio of 90:3:3:1, stir for 0.5 hours to form a uniform solution, and then pour the solution into the reaction In the still, put the carbon fiber cloth dried in step S1 into the reaction kettle, and react at 85°C for 5h; , and finally dried at 60°C for 6 hours;
[0046] S3: Prepare a 0.4 mg / L graphene oxide solution, and electrodeposit the rGO layer by cyclic voltammetry on the surface of the carbon fiber cloth deposited with nickel hydroxide after the drying treatment in step S2, wherein the electrodeposition voltage window is -1.2V, cycle 12 ...
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