Preparation method of 3D coralline graphene/NiCo2O4 composite material and application of same in super capacitor
A supercapacitor and composite material technology, which is applied in the chemical industry, can solve the problems of slow mass transfer, time-consuming and energy-consuming, serious agglomeration of composite materials, etc., and achieve the effects of saving costs, reducing energy consumption, and large specific surface area
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Embodiment 1
[0031] Disperse 10 mg of GO in a mixed solvent of absolute ethanol-water (V:V=10:0), ultrasonically disperse to form a suspension, add 0.582 g of nickel nitrate hexahydrate and 1.164 g of cobalt nickel nitrate hexahydrate, Stir to dissolve completely. Transfer the above suspension to a microwave-assisted heating device, adjust the microwave power to 300W, heat to reflux, add 10 mL of ammonia water to react for 10 min, cool, centrifuge, collect the precipitate, wash twice with absolute ethanol, and dry in vacuum at 50 °C to prepare GO / nickel-cobalt layered double hydroxide composites were obtained. The obtained GO / nickel-cobalt layered double hydroxide was calcined in a tube furnace at 800 °C for 2 h, and the precipitate was collected. Get 3D coral-like graphene / NiCo 2 o 4 composite material. 30 mg 3D coral-like graphene / NiCo 2 o 4 The composite material was ground and mixed with 5.6 mg acetylene black, a little polytetrafluoroethylene binder (15%) was added, a small amou...
Embodiment 2
[0033] Disperse 20 mg of GO in anhydrous ethanol-water (V:V=9:1) mixed solvent, ultrasonically disperse to form a suspension, add 0.582 g nickel nitrate hexahydrate, 1.164 g cobalt nickel nitrate hexahydrate salt, Stir to dissolve completely. Transfer the above suspension to a microwave-assisted heating device, adjust the microwave power to 400W, heat to reflux, add 10 mL of ammonia water to react for 15 min, cool, centrifuge, collect the precipitate, wash with absolute ethanol three times, and dry under vacuum at 60 °C. GO / nickel-cobalt layered double hydroxide composites were prepared. The obtained GO / nickel-cobalt layered double hydroxide was calcined in a tube furnace at 700 °C for 3 h, and the precipitate was collected. Get 3D coral-like graphene / NiCo 2 o 4 composite material. 30 mg 3D coral-like graphene / NiCo 2 o 4 The composite material was ground and mixed with 5.6 mg acetylene black, a little polytetrafluoroethylene binder (15%) was added, a small amount of abso...
Embodiment 3
[0035] Disperse 30 mg of GO in anhydrous ethanol-water (V: V=9.9: 0.1) mixed solvent, ultrasonically disperse to form a suspension, add 0.582 g nickel nitrate hexahydrate, 1.164 g cobalt nickel nitrate hexahydrate salt, Stir to dissolve completely. Transfer the above suspension to a microwave-assisted heating device, adjust the microwave power to 400W, heat to reflux, add 10 mL of ammonia water to react for 20 min, cool, centrifuge, collect the precipitate, wash with absolute ethanol three times, and dry under vacuum at 60 °C. GO / nickel-cobalt layered double hydroxide composites were prepared. The obtained GO / nickel-cobalt layered double hydroxide was calcined in a tube furnace at 800 °C for 2 h, and the precipitate was collected. Get 3D coral-like graphene / NiCo 2 o 4 composite material. 30 mg 3D coral-like graphene / NiCo 2 o 4 The composite material was ground and mixed with 5.6 mg acetylene black, a little polytetrafluoroethylene binder (15%) was added, a small amount o...
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