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A fabrication method of nitrogen-doped graphene supercapacitor based on redox active electrolyte

A nitrogen-doped graphene and supercapacitor technology, applied in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrodes, hybrid capacitor electrolytes, etc., can solve the problem of increasing the degree of pseudocapacitive active electrolyte without providing the specific capacitance data of the electrode itself , to achieve the effects of good surface hydrophilicity, improved electrode capacitance, and good conductivity

Inactive Publication Date: 2018-02-09
HENAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Invention patent (preparation method of redox active electrolyte, CN102360953A) uses aromatic amine as the pseudocapacitive active component in the electrolyte, which can increase the specific capacity of the electrode of the supercapacitor to 400F / g, but the device does not provide the specific capacity data of the electrode itself and Pseudocapacitive active electrolyte increases the specific capacity of the electrode

Method used

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  • A fabrication method of nitrogen-doped graphene supercapacitor based on redox active electrolyte
  • A fabrication method of nitrogen-doped graphene supercapacitor based on redox active electrolyte

Examples

Experimental program
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Effect test

Embodiment 1

[0016] Dissolve 2.4g of the surfactant cetyltrimethylammonium bromide in an aqueous solution (40mL) containing 0.04g of graphene oxide, place the solution in an ice-water bath at 0°C, and add 2g of Ammonium persulfate and 2g of pyrrole monomer were stirred and reacted for 24h; the resulting black precipitate was washed and dried with deionized water, mixed with sodium hydroxide in a mass ratio of 1:2, placed in a nickel crucible under nitrogen gas Calcined at 600°C for 2h under the condition. After cooling, wash with dilute hydrochloric acid and deionized water to remove sodium hydroxide to obtain a nitrogen-doped porous graphene electrode material with a specific surface area of ​​1207m 2 / g. The obtained nitrogen-doped porous graphene electrode material, the acetylene black conductive agent and the nitrogen-methylpyrrolidone dispersion of polyvinylidene fluoride were mixed in a mass ratio of 85:10:5 and ground to form a homogeneous slurry Material, coated with 1cm on the s...

Embodiment 2

[0019] Dissolve 2.4g of the surfactant cetyltrimethylammonium bromide in an aqueous solution (40mL) containing 0.04g of graphene oxide, place the solution in an ice-water bath at 0°C, and add 4g of Ammonium persulfate and 4g pyrrole monomer were stirred and reacted for 24h; after the black precipitate was washed and dried with deionized water, it was mixed with potassium hydroxide in a mass ratio of 1:3, placed in a nickel crucible under nitrogen gas Calcined at 700°C for 2h under the condition. After cooling, it was washed with dilute hydrochloric acid and deionized water to neutrality to obtain a nitrogen-doped porous graphene electrode material with a specific surface area of ​​2036m 2 / g. Mix and grind the obtained nitrogen-doped porous graphene electrode material, acetylene black conductive agent and polyvinylidene fluoride nitrogen methyl pyrrolidone dispersion according to the mass ratio of 85:10:5 to form a uniform slurry , coated on the stainless steel current colle...

Embodiment 3

[0022] Dissolve 2.4g of the surfactant cetyltrimethylammonium bromide in an aqueous solution (40mL) containing 0.04g of graphene oxide, place the solution in an ice-water bath at 0°C, and add 8g of Ammonium persulfate and 8g of pyrrole monomer were stirred and reacted for 24h; after the black precipitate was washed and dried with deionized water, it was mixed with potassium hydroxide in a mass ratio of 1:4, placed in a nickel crucible under argon gas Calcined at 600°C for 2h under the condition. After cooling, potassium hydroxide was removed by washing with dilute hydrochloric acid and deionized water to obtain a nitrogen-doped porous graphene electrode material with a specific surface area of ​​2276m 2 / g. The nitrogen-doped porous graphene electrode material, acetylene black conductive agent and polyvinylidene fluoride binder are mixed according to the mass ratio of 85:10:5 and ground to form a uniform slurry, which is coated on the stainless steel current collector. into ...

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Abstract

The invention discloses a method for manufacturing a nitrogen-doped graphene supercapacitor based on a redox active electrolyte, and specifically discloses the preparation of a pseudocapacitive active aqueous electrolyte, the preparation of nitrogen-doped porous graphene, and the supercapacitor of a pseudocapacitive active electrolyte system. The construction method of the capacitor is mainly to greatly improve the capacitance performance of the supercapacitor through the double capacitance contribution of the electrode material and the electrolyte. The invention can increase the specific capacity of the supercapacitor by about 3 times through the pseudocapacitance contribution of the redox active components in the electrolyte, and has great potential for improving the specific capacity and energy density of the supercapacitor.

Description

technical field [0001] The invention belongs to the technical fields of preparation of electrode materials for energy devices and preparation of electrolytes, and in particular relates to a method for manufacturing a nitrogen-doped graphene supercapacitor based on a redox active electrolyte. Background technique [0002] Supercapacitor is a new type of electrochemical energy storage device, which has the advantages of fast charge and discharge rate, high power density, long cycle life, safety and environmental protection. It can be used as a reliable and efficient energy storage device in electric tools, hybrid vehicles, large pulse equipment and starting devices. However, compared with other secondary batteries, the energy density of supercapacitors is low. Therefore, increasing the specific capacity of supercapacitors is one of the main ways to solve the energy density of supercapacitors. Preparation of electrode materials with different types, different morphologies and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/84H01G11/86H01G11/24H01G11/30H01G11/36H01G11/64
CPCY02E60/13
Inventor 高志永刘晓武大鹏常玖利陈晨徐芳蒋凯
Owner HENAN NORMAL UNIV
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