Nitrogen-oxygen co-doped activated carbon aerogel electrode material, solid super-capacitor, and preparation method for nitrogen-oxygen co-doped activated carbon aerogel electrode material

A carbon aerogel and electrode material technology, applied in the field of electrochemistry, can solve the problems of low energy density and achieve high specific capacitance, reasonable pore size distribution, and small equivalent series resistance

Inactive Publication Date: 2018-09-11
BEIJING INSTITUTE OF TECHNOLOGYGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the specific capacitance of carbon materials is much smaller than that of metal oxides and conducting polymers, which is one of the reasons why the energy density of carbon-based supercapacitor devices is very small.

Method used

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  • Nitrogen-oxygen co-doped activated carbon aerogel electrode material, solid super-capacitor, and preparation method for nitrogen-oxygen co-doped activated carbon aerogel electrode material
  • Nitrogen-oxygen co-doped activated carbon aerogel electrode material, solid super-capacitor, and preparation method for nitrogen-oxygen co-doped activated carbon aerogel electrode material
  • Nitrogen-oxygen co-doped activated carbon aerogel electrode material, solid super-capacitor, and preparation method for nitrogen-oxygen co-doped activated carbon aerogel electrode material

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Experimental program
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Effect test

Embodiment 1

[0029] 0.3 g of sodium alginate was added to 15 mL of deionized water, and stirred at room temperature for 24 h to obtain a transparent solution. Then take 0.5g of aniline monomer and add it to the above-mentioned ice-water bath for magnetic stirring, then take 0.57g of initiator solution to initiate aniline polymerization, and put sodium alginate-polyaniline airgel, that is, nitrogen and oxygen co-doped activated carbon aerogel, through freezing Drying technology Drying for 48h. The obtained samples were pre-carbonized at 450°C for 2 hours, and then kept at 600°C for 2 hours; mixed with an activator, the dried samples were directly heated from room temperature to 600°C for 2 hours.

[0030] The sodium alginate-based nitrogen-oxygen co-doped activated carbon airgel electrode material activated by carbonization at 600°C, the conductive agent and the binder were mixed in a ratio of 90:5:10 to make a slurry, and then coated on the corresponding On a current collector of a certai...

Embodiment 2

[0034] 0.3 g of sodium alginate was added to 15 mL of deionized water, and stirred at room temperature for 24 h to obtain a transparent solution. Then take 0.5g of aniline monomer and add it to the above-mentioned ice-water bath for magnetic stirring, then take 0.57g of initiator solution to initiate the polymerization of aniline, and dry the sodium alginate-polyaniline airgel by freeze-drying technology for 48 hours. The obtained samples were pre-carbonized at 450°C for 2 hours, and then kept at 700°C for 2 hours; mixed with an activator, the dried samples were directly heated from room temperature to 700°C for 2 hours.

[0035] The sodium alginate-based nitrogen-oxygen co-doped activated carbon airgel electrode material activated by carbonization at 700°C, the conductive agent and the binder were mixed in a ratio of 80:15:5 to make a slurry, and then coated on the corresponding On a current collector of a certain size, dry it at 80°C to obtain a supercapacitor electrode shee...

Embodiment 3

[0039] 0.3 g of sodium alginate was added to 15 mL of deionized water, and stirred at room temperature for 24 h to obtain a transparent solution. Then take 0.5g of aniline monomer and add it to the above-mentioned ice-water bath for magnetic stirring, then take 0.57g of initiator solution to initiate the polymerization of aniline, and dry the sodium alginate-polyaniline airgel by freeze-drying technology for 48 hours. The obtained samples were pre-carbonized at 450°C for 2 hours, and then kept at 800°C for 2 hours; mixed with an activator, the dried samples were directly heated from room temperature to 800°C for 2 hours.

[0040] The sodium alginate-based nitrogen-oxygen co-doped activated carbon airgel electrode material activated by carbonization at 800°C, the conductive agent and the binder were mixed at a ratio of 85:8:8 to make a slurry, and then coated on the corresponding On a current collector of a certain size, dry it at 80°C to obtain a supercapacitor electrode sheet...

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Abstract

The invention relates to a nitrogen-oxygen co-doped activated carbon aerogel electrode material, a solid super-capacitor, and a preparation method for the nitrogen-oxygen co-doped activated carbon aerogel electrode material. The method comprises the steps: preparing polyaniline-sodium alginate hydrogel, preparing polyaniline-sodium alginate aerogel, mixing the prepared polyaniline-alginate aerogelwith a conductive agent and a binder, coating a current collector with the mixture, and performing drying to obtain a supercapacitor electrode piece. The solid super-capacitor provided by the invention comprises two electrode pieces and a gel polymer electrolyte between the two electrode pieces. The electrode pieces are the aerogel electrode materials prepared through the above methods. The marine nitrogen-oxygen co-doped activated carbon aerogel for the prepared solid super-capacitor is large in specific surface area, is reasonable in aperture distribution, is high in content of nitrogen-oxygen doping, is unique in ultramicropore structure, is good in wettability, and is small in equivalent series resistance. The super-capacitor electrode material is very high in specific capacitance, isvery high in energy density, power density and is excellent in coulombic efficiency.

Description

technical field [0001] The invention belongs to the field of electrochemistry, and in particular relates to a nitrogen-oxygen co-doped activated carbon airgel electrode material, a solid supercapacitor and a preparation method thereof. Background technique [0002] At present, fossil fuels (oil, coal, natural gas) are still the main source of energy in the world. However, with the world's population growth and rapid economic development, traditional fossil fuels are not only facing increasing depletion, but also the greenhouse gases produced by their combustion have caused serious environmental problems. Therefore, there is an urgent need to prepare green, sustainable, high-efficiency and low-cost energy storage materials. [0003] Supercapacitors, also known as electrochemical capacitors, are widely used in electric vehicles, electronic products and renewable energy due to their high power density, long cycle life, fast discharge and safety performance. In general, superc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/24H01G11/32H01G11/48H01G11/86
CPCH01G11/24H01G11/32H01G11/48H01G11/86Y02E60/13
Inventor 王飞俊叶正青邵自强吕妍妍
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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