Supercapacitor electrode material and preparation method thereof
A technology for supercapacitors and electrode materials, applied in the manufacture of hybrid capacitor electrodes, hybrid/electric double layer capacitors, etc., can solve the problems of small effective specific surface area, poor conductivity, insufficient energy density, etc., and achieve excellent cycle performance and good conductivity , the effect of large specific surface area
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Embodiment 1
[0018] 1) Using graphite oxide as a precursor, obtain single-layer graphene oxide by ultrasonic method and disperse it in deionized water, add MnCl 2 Ultrasonic stirring disperses evenly. Wherein the graphene oxide concentration is 2g / L; MnCl 2 The concentration is 3g / L.
[0019] 2) Add hydrazine hydrate with a volume ratio of 1 / 3 to the solution in step 1), and the hydrazine hydrate concentration is 26%.
[0020] 3) Pour the mixed solution in step 2) into a hydrothermal reaction kettle for hydrothermal reaction. The hydrothermal reaction temperature is 95° C., and the hydrothermal time is 20 h. ;
[0021] 4) Suction filtration, washing, and drying of the reaction product in step 3) to obtain graphene gel / MnO 2 Composite material, wherein the drying temperature is 70°C and the drying time is 9h.
[0022] The above graphene gel / MnO 2 After the composite material was uniformly mixed with SuperP and PVDF at a mass ratio of 30:2:1, a supercapacitor was fabricated with carbon...
Embodiment 2
[0026] 1) Using graphite oxide as a precursor, obtain single-layer graphene oxide by ultrasonic method and disperse it in deionized water, add MnCl 2 Ultrasonic stirring disperses evenly. Wherein the graphene oxide concentration is 2g / L; MnCl 2 The concentration is 1g / L.
[0027] 2) Add hydrazine hydrate with a volume ratio of 1 / 3 to the solution in step 1), and the hydrazine hydrate concentration is 20%.
[0028] 3) Pour the mixed solution in step 2) into a hydrothermal reaction kettle for hydrothermal reaction. The hydrothermal reaction temperature is 95° C., and the hydrothermal time is 20 h. ;
[0029] 4) Suction filtration, washing, and drying of the reaction product in step 3) to obtain graphene gel / MnO 2 Composite material, wherein the drying temperature is 70°C and the drying time is 9h.
[0030] The above graphene gel / MnO 2 After the composite material was uniformly mixed with SuperP and PVDF at a mass ratio of 30:2:1, a supercapacitor was fabricated with carbon...
Embodiment 3
[0034] 1) Using graphite oxide as a precursor, obtain single-layer graphene oxide by ultrasonic method and disperse it in deionized water, add MnCl 2 Ultrasonic stirring disperses evenly. Wherein the graphene oxide concentration is 2g / L; MnCl 2 The concentration is 5g / L.
[0035] 2) Add hydrazine hydrate with a volume ratio of 1 / 3 to the solution in step 1), and the hydrazine hydrate concentration is 30%.
[0036] 3) Pour the mixed solution in step 2) into a hydrothermal reaction kettle for hydrothermal reaction, the hydrothermal reaction temperature is 95°C, and the hydrothermal time is 20h. ;
[0037] 4) The reaction product in step 3) is suction filtered, washed and dried to obtain graphene gel / MnO 2 Composite material, wherein the drying temperature is 70°C and the drying time is 9h.
[0038] The above graphene gel / MnO 2 After the composite material was uniformly mixed with SuperP and PVDF at a mass ratio of 30:2:1, a supercapacitor was fabricated with carbon as a re...
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