A kind of electrolytic capacitor electrode piece and preparation method thereof
A technology for electrolytic capacitors and electrode sheets, 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 improving stability and consistency, simple preparation process and low cost
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[0021] The preparation method of above-mentioned electrolytic capacitor electrode sheet provided by the present invention, its steps are as follows:
[0022] S1. Dissolve graphene oxide in an aqueous solution, and then add conductive polymers (such as conductive polymers including aniline monomers, 3,4-ethylenedioxythiophene monomers or pyrrole monomers) to the aqueous solution to obtain electrolytic liquid; wherein, in the electrolyte, the molar concentration of graphene oxide is 1~3mol / L;
[0023] S2. Insert aluminum foil or aluminum mesh as an electrode into the electrolyte prepared in step S1, and pass a direct current of 1 to 10 mA on the electrode for 1 to 24 hours to obtain an aluminum / graphene oxide-conductive polymer electrode piece;
[0024] S3. Place the aluminum / graphene oxide-conductive polymer electrode sheet prepared in step S2 in a vacuum atmosphere and bake at 80-300° C. for 2-24 hours to prepare an aluminum / graphene-conductive polymer electrode sheet;
[00...
Embodiment 1
[0032] The preparation method of electrolytic capacitor electrode sheet is as follows:
[0033] (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;
[0034] (2) the graphene oxide prepared by (1) is dissolved in a container filled ...
Embodiment 2
[0040] The preparation method of electrolytic capacitor electrode sheet is as follows:
[0041] (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;
[0042] (2) Dissolve the graphene oxide prepared in (1) in a container filled with...
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