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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

Inactive Publication Date: 2019-03-01
JIANGSU JINYI NEW ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

MnO 2 It is a very potential electrode material, which shows a wide potential window and good capacitance performance in neutral electrolyte, and is rich in sources, non-toxic and harmless, and widely praised; but MnO 2 The poor conductivity and small effective specific surface area are unfavorable factors restricting its promotion as a supercapacitor electrode material, and MnO 2 Different from general pseudocapacitive materials, the capacitance of manganese dioxide mainly comes from its surface reaction, so having a large specific surface area is the most effective way to increase its specific capacitance
[0003] Graphene gel has a high power density, but its energy density is still slightly insufficient compared to other pseudocapacitive materials

Method used

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  • Supercapacitor electrode material and preparation method thereof
  • Supercapacitor electrode material and preparation method thereof
  • Supercapacitor electrode material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

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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Abstract

The invention relates to a supercapacitor electrode material. The supercapacitor electrode material is a graphene gel / MnO2 composite material, graphite oxide is taken as a precursor, single-layer oxidized graphene is obtained by using an ultrasonic method and is dispersed into deionized water, MnCl2 is added for ultrasonic stirring and uniform dispersion, then hydrazine hydrate is added for uniform stirring to obtain a mixed solution, the mixed solution is poured into a hydrothermal reactor for a hydrothermal reaction, and suction filtration, washing and drying are carried out on a reaction product to obtain the graphene gel / MnO2 composite material. The composite material has the characteristics of great specific surface area, high electroconductibility, high capacitance and excellent cycle performance.

Description

technical field [0001] The invention belongs to the technical field of supercapacitor material synthesis, and in particular relates to a supercapacitor electrode material and a preparation method thereof. Background technique [0002] Supercapacitor is an energy storage device with long life, high power density and fast charging ability. It has attracted great attention in various electronic equipment, energy storage, new energy vehicles and other application fields. Since it is the electrode material that determines the performance of the supercapacitor, most scientific researchers focus their research on this aspect. MnO 2 It is a very potential electrode material, which shows a wide potential window and good capacitance performance in neutral electrolyte, and is rich in sources, non-toxic and harmless, and widely praised; but MnO 2 The poor conductivity and small effective specific surface area are unfavorable factors restricting its promotion as a supercapacitor electr...

Claims

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Application Information

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IPC IPC(8): H01G11/32H01G11/30H01G11/26H01G11/86
CPCH01G11/26H01G11/30H01G11/32H01G11/86Y02E60/13
Inventor 秦学吕军王宏智周琴
Owner JIANGSU JINYI NEW ENERGY TECH CO LTD
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