Preparation method of positive plate with pre-embedded lithium graphene

[0032] (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 .

[0033] (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 by volume to react at 800°C for 10 hours, and cool naturally after the reaction is complete.

[0034] (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.

[0035] (4) Add lithium carbonate to water, sonicate for 10 minutes to form a solution with a mass concentration of 30%, and then titrate the lithium carbonate solution onto the graphene foam, dry it, and then put it in a muffle furnace for an

[0039] (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 .

[0040] (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 by volume to react at 1100°C for 1 hour, and cool naturally after the reaction is complete.

[0041] (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.

[0042] (4) Add lithium carbonate to water, ultrasonicate for 10-30min to form a solution with a mass concentration of 70%, then titrate the lithium carbonate solution onto the graphene foam, dry it, and then put it in a muffle furnace for 300°C a

[0046](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 for ultrasonic dispersion to form a suspension with a concentration of 3g / L .

[0047] (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 by volume to react at 900°C for 5 hours, and cool naturally after the reaction is complete.

[0048] (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.

[0049] (4) Add lithium carbonate to water, sonicate for 20 minutes to form a solution with a mass concentration of 50%, then titrate and coat the lithium carbonate solution on the foamed graphene, dry it, and then put it in a muffle furnace for ann