A kind of composite graphene airgel electrode, its preparation method and application
A technology of graphene airgel and composite graphene, which is applied in the manufacture of hybrid capacitor electrodes and hybrid/electric double layer capacitors. The effect of high mechanical stability and high electrochemical activity
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[0034] A preparation method for a composite graphene airgel electrode, comprising the following steps:
[0035] 1) Cleaning of the electrode substrate: Cut the titanium sheet into a sample of 1cm×2cm, clean the sample with distilled water, ethanol, and acetone in sequence to remove surface impurities and oil, dry it in a vacuum drying oven, and then put it in nitrogen gloves spare in the box;
[0036] 2) Preparation of graphene hydrogel: first prepare 10mL concentration of 5mg·mL -1 Graphene oxide solution, at least two of ammonia, thiourea and boric acid are added to the graphene oxide solution to obtain a mixed solution, so that the mass ratio of GO to ammonia, thiourea and boric acid is 1: (0~ 1.14): (0 ~ 0.024): (0 ~ 0.0024), then the mixed solution is added to the reaction kettle and placed in an oven with a temperature of 90 ~ 150 ° C for 6 ~ 14 hours, and the hydrothermal reaction is carried out to obtain graphene water. gel;
[0037] 3) Dialysis of the graphene hydr...
Embodiment 1
[0042] A preparation method for a composite graphene airgel electrode, comprising the following steps:
[0043] 1) Cleaning of the electrode substrate: Cut the titanium sheet into a sample of 1cm×2cm, clean the sample with distilled water, ethanol, and acetone in sequence to remove surface impurities and oil, dry it in a vacuum drying oven, and then put it in nitrogen gloves spare in the box;
[0044] 2) Preparation of graphene hydrogel: first prepare 10mL concentration of 5mg·mL -1 Graphene oxide solution, then ultrasonic and magnetic stirring for 1h each, adding ammonia and thiourea and then magnetically stirring for 1h to obtain a mixed solution, wherein the mass ratio of GO to ammonia and thiourea was 1:1.14:0.012, and the mixed solution was added to the reaction Put it in the kettle and place it in an oven at 120°C, dry it for 6 hours, and obtain a graphene hydrogel after hydrothermal reaction;
[0045] 3) Dialysis of the graphene hydrogel: prepare a mixed dialysate of ...
Embodiment 2
[0051] A preparation method for a composite graphene airgel electrode, comprising the following steps:
[0052] 1) Cleaning of the electrode substrate: Cut the titanium sheet into a sample of 1cm×2cm, clean the sample with distilled water, ethanol, and acetone in sequence to remove surface impurities and oil, dry it in a vacuum drying oven, and then put it in nitrogen gloves spare in the box;
[0053] 2) Preparation of graphene hydrogel: first prepare 10mL concentration of 5mg·mL -1 Graphene oxide solution, then ultrasonic and magnetic stirring for 1h each, adding ammonia water and boric acid and magnetic stirring for 1h to obtain a mixed solution, so that the mass ratio of GO to ammonia water and boric acid was 1:1.14:0.0024, and then the mixed solution was added to the reaction kettle and placed in an oven with a temperature of 120° C. for 6 hours to perform a hydrothermal reaction to obtain a graphene hydrogel;
[0054] 3) Dialysis of the graphene hydrogel: prepare a mixe...
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