Manufacturing method for redox activity electrolyte based nitrogen-doped graphene supercapacitor

A nitrogen-doped graphene and supercapacitor technology, which is applied in the manufacture of hybrid/electric double-layer capacitors, hybrid capacitor electrodes, hybrid capacitor electrolytes, etc., can solve problems such as the improvement of pseudocapacitive active electrolytes without providing the electrode's own specific capacity data , to achieve the effects of good surface hydrophilicity, improved electrode capacitance, and efficient electrolyte diffusion channels

Inactive Publication Date: 2016-06-01
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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  • Manufacturing method for redox activity electrolyte based nitrogen-doped graphene supercapacitor
  • Manufacturing method for redox activity electrolyte based nitrogen-doped graphene supercapacitor

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 manufacturing method for a redox activity electrolyte based nitrogen-doped graphene supercapacitor, and specifically discloses manufacturing methods for a pseudocapacitance active water system electrolyte, nitrogen-doped porous graphene and a pseudocapacitance active electrolyte system supercapacitor. The capacitive performance of the supercapacitor is greatly improved mainly through the dual-capacitive contribution of electrode materials and the electrolyte. The specific capacity of the supercapacitor is improved by about three times through the pseudocapacitance contribution of the redox activity ingredients in the electrolyte, so that the great improvement potential exists in supercapacitor specific capacity and the energy density.

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 Applications(China)
IPC IPC(8): H01G11/84H01G11/86H01G11/24H01G11/30H01G11/36H01G11/64
CPCY02E60/13H01G11/84H01G11/24H01G11/30H01G11/36H01G11/64H01G11/86
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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