A composite solid electrolytic capacitor electrode sheet and its preparation method
A capacitor electrode and solid electrolysis technology, applied in the field of electrode sheets, can solve the problems of easy combustion, high production cost, limited future market for environmental protection, etc., and achieve the effects of simple preparation process, improved stability and consistency, and low cost
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[0022] The preparation method of above-mentioned compound type solid electrolytic capacitor electrode sheet provided by the present invention, its steps are as follows:
[0023] S1. Immerse the aluminum foil or aluminum mesh in a container filled with titanium tetrachloride solution, and then repeatedly place the aluminum foil or aluminum mesh in the air to make titanium tetrachloride fully react with water to produce titanium dioxide, and then put it on the aluminum foil Or the titanium dioxide thin film layer is made on the surface of the aluminum mesh;
[0024] S2, dissolving graphene oxide in an aqueous solution, and then adding ammonium bicarbonate or urea that acts as a reducing agent to prepare an electrolyte; wherein, the molar concentration of graphene oxide is 1 to 3 mol / L;
[0025] S3, immerse the titanium dioxide-coated aluminum foil or aluminum mesh prepared in step S1 into the electrolyte solution prepared in S2 for 1-72 hours, and then bake in a vacuum environme...
Embodiment 1
[0034] The preparation method of composite solid electrolytic capacitor electrode sheet is as follows:
[0035] (1) Graphite oxide: add 20 g of 50-mesh graphite powder with a purity of 99.5%, 10 g of potassium persulfate and 10 g of phosphorus pentoxide into concentrated sulfuric acid at 80° C., stir evenly, cool for more than 6 hours, wash until neutral, and dry; Add the dried sample to 230mL of concentrated sulfuric acid at 0°C, then add 60g of potassium permanganate, keep the temperature of the mixture below 20°C, then keep it in an oil bath at 35°C for 2h, then slowly add 920mL of deionized water After 15 minutes, add 2.8L of deionized water and 50mL of 30% hydrogen peroxide successively, after which the color of the mixture turns bright yellow, suction filter while it is hot, and then wash with 5L of 10% hydrochloric acid, suction filter, Graphite oxide was obtained by vacuum drying at 60°C for 48 hours;
[0036] (2) Immerse the aluminum foil in a container filled with t...
Embodiment 2
[0043] The preparation method of composite solid electrolytic capacitor electrode sheet is as follows:
[0044](1) Graphite oxide: add 20 g of 50-mesh graphite powder with a purity of 99.5%, 10 g of potassium persulfate and 10 g of phosphorus pentoxide into concentrated sulfuric acid at 80° C., stir evenly, cool for more than 6 hours, wash until neutral, and dry; Add the dried sample to 230mL of concentrated sulfuric acid at 0°C, then add 60g of potassium permanganate, keep the temperature of the mixture below 20°C, then keep it in an oil bath at 35°C for 2h, then slowly add 920mL of deionized water After 15 minutes, add 2.8L of deionized water and 50mL of 30% hydrogen peroxide successively, after which the color of the mixture turns bright yellow, suction filter while it is hot, and then wash with 5L of 10% hydrochloric acid, suction filter, Graphite oxide was obtained by vacuum drying at 60°C for 48 hours;
[0045] (2) Immerse the aluminum mesh in a container filled with ti...
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