Manufacturing method of tin-oxide composite graphene foam electrode sheet
A composite graphene and tin oxide technology, applied in hybrid capacitor electrodes, hybrid/electric double layer capacitor manufacturing, etc., can solve the problem of affecting the dispersion and surface wettability of graphene materials, reducing the effective specific surface area and conductivity of graphene materials efficiency and other issues, to achieve the effect of energy density and high power density, high energy density and high power density, and cost reduction
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Embodiment 1
[0027] (1) Add 10g of graphite oxide and 0.001g of polyacrylonitrile into a ball mill and mill for 30 minutes, then add the ball-milled mixture into a mixed solution with a volume ratio of ethanol and water of 0.25 for ultrasonic dispersion to form a suspension with a concentration of 1g / L .
[0028] (2) Soak the nickel foam in the above suspension for 10 minutes, evaporate the solvent to dryness, and then put it into a muffle furnace protected by a hydrogen-nitrogen mixture containing 5% hydrogen to react at 800°C for 10 hours, and cool naturally after the reaction is complete.
[0029] (3) Immerse the above product in 1mol / L hydrochloric acid, react at 60°C for 10h, and obtain foamed graphene after the reaction is complete.
[0030] (4) Add tin oxide to toluene, sonicate for 10 minutes to form a suspension with a mass concentration of 30%, and then titrate and coat the toluene suspension containing tin oxide on the foamed graphene, dry it, and then put it in a muffle furnace...
Embodiment 2
[0033] (1) Add 10g of graphite oxide and 0.5g of polyacrylonitrile into a ball mill and mill for 60 minutes, then add the ball-milled mixture into a mixed solution with a volume ratio of ethanol and water of 4 and ultrasonically disperse to form a suspension with a concentration of 20g / L .
[0034] (2) Soak the nickel foam in the above suspension for 60 minutes, evaporate the solvent to dryness, and then put it into a muffle furnace protected by a hydrogen-nitrogen mixture containing 5% hydrogen to react at 1100°C for 1 hour, and cool naturally after the reaction is complete.
[0035] (3) Immerse the above product in 3mol / L hydrochloric acid, react at 80°C for 5h, and obtain foamed graphene after the reaction is complete.
[0036] (4) Add tin oxide to toluene, sonicate for 10-30 minutes to form a suspension with a mass concentration of 70%, then titrate and coat the toluene suspension containing tin oxide on the foamed graphene, dry it, and then put it into a muffle furnace I...
Embodiment 3
[0039] (1) Add 10g of graphite oxide and 0.1g of polyacrylonitrile into a ball mill and mill for 45 minutes, then add the ball-milled mixture into a mixed solution with a volume ratio of ethanol and water of 0.5 and ultrasonically disperse to form a suspension with a concentration of 3g / L .
[0040] (2) Soak the nickel foam in the above suspension for 30 minutes, evaporate the solvent to dryness, and then put it into a muffle furnace protected by a hydrogen-nitrogen mixture containing 5% hydrogen to react at 900°C for 5 hours, and cool naturally after the reaction is complete.
[0041] (3) Immerse the above product in 2mol / L hydrochloric acid, react at 75°C for 7h, and obtain foamed graphene after the reaction is complete.
[0042] (4) Add tin oxide to toluene, sonicate for 20 minutes to form a suspension with a mass concentration of 50%, and then titrate and coat the toluene suspension containing tin oxide on the foamed graphene, dry it, and then put it into a muffle furnace ...
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