Supercapacitor electrode material and preparation method thereof

A technology for supercapacitors and electrode materials, applied in hybrid capacitor electrodes, chemical instruments and methods, inorganic chemistry, etc., can solve the problems of serious agglomeration, low conductivity, and low specific surface area, and achieve short reaction time, excellent performance, and improved The effect of conductivity

Inactive Publication Date: 2021-02-19
犀望新能源科技(昆山)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, a single MnO 2 The disadvantages of low specific surface area, severe agglomeration, and low conductivity limit its application in the field of supercapacitors

Method used

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  • Supercapacitor electrode material and preparation method thereof

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Effect test

Embodiment 1

[0034] A method for preparing an electrode material for a supercapacitor, comprising the following steps: (1) adding potassium permanganate and manganese sulfate to deionized water, stirring evenly, heating to 160° C., reacting for 3 hours, centrifuging, washing and drying, and preparing sea urchin nano-sized α-MnO 2 ;

[0035] The mass ratio of described deionized water, potassium permanganate, manganese sulfate is 100:2.1:3.4;

[0036] (2) The sea urchin-like nano-α-MnO 2 Add deionized water, heat to 100°C, and react for 1h to obtain hydroxyl-functionalized sea urchin-like nano-α-MnO 2 ;

[0037] The deionized water and the sea urchin-shaped nano-α-MnO 2 The mass ratio is 1000:7.5;

[0038] (3) Under a nitrogen atmosphere, N,N-dimethylformamide, the hydroxyl-functionalized sea urchin-like nano-α-MnO 2 Mixed with 2-azidoethylamine, heated to 60°C, reacted for 24h, centrifuged, washed with water and dried to prepare azide-functionalized sea urchin-like nano-α-MnO 2 ;

...

Embodiment 2

[0044] A preparation method of supercapacitor electrode material, comprising the following steps:

[0045] (1) Potassium permanganate, manganese sulfate, and aluminum sulfate were added to deionized water, stirred evenly, heated to 160°C, reacted for 3 hours, centrifuged, washed with water and dried to prepare sea urchin-like nano-α-MnO 2 ;

[0046] The mass ratio of described deionized water, potassium permanganate, manganese sulfate, aluminum sulfate is 100:2.1:3.4:4.5;

[0047] (2) The sea urchin-like nano-α-MnO 2 Add deionized water, heat to 100°C, and react for 1h to obtain hydroxyl-functionalized sea urchin-like nano-α-MnO 2 ;

[0048] The deionized water and the sea urchin-shaped nano-α-MnO 2 The mass ratio is 1000:7.5;

[0049] (3) Under a nitrogen atmosphere, N,N-dimethylformamide, the hydroxyl-functionalized sea urchin-like nano-α-MnO 2 Mixed with 2-azidoethylamine, heated to 60°C, reacted for 24h, centrifuged, washed with water and dried to prepare azide-funct...

Embodiment 3

[0055] A preparation method of supercapacitor electrode material, comprising the following steps:

[0056] (1) Potassium permanganate, manganese sulfate, and cobalt sulfate were added to deionized water, stirred evenly, heated to 160°C, reacted for 3 hours, centrifuged, washed with water and dried to prepare sea urchin-like nano-α-MnO 2 ;

[0057] The mass ratio of described deionized water, potassium permanganate, manganese sulfate, cobalt sulfate is 100:2.1:3.4:4.5;

[0058] (2) The sea urchin-like nano-α-MnO 2 Add deionized water, heat to 100°C, and react for 1h to obtain hydroxyl-functionalized sea urchin-like nano-α-MnO 2 ;

[0059] The deionized water and the sea urchin-shaped nano-α-MnO 2 The mass ratio is 1000:7.5;

[0060] (3) Under a nitrogen atmosphere, N,N-dimethylformamide, the hydroxyl-functionalized sea urchin-like nano-α-MnO 2 Mixed with 2-azidoethylamine, heated to 60°C, reacted for 24h, centrifuged, washed with water and dried to prepare azide-functiona...

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Abstract

The invention discloses a supercapacitor electrode material and a preparation method thereof. The preparation method comprises the following steps of: by taking potassium permanganate as a reducing agent and manganese sulfate as a manganese source, preparing sea urchin-shaped nano alpha-MnO2 by adopting a hydrothermal method, then performing hydroxylation modification, grafting polyimide resin tothe sea urchin-shaped nano alpha-MnO2 by adopting a click chemistry mode to obtain the sea urchin-shaped nano alpha-MnO2 grafted polyimide resin, and carrying out high-temperature activation treatmenton the sea urchin-shaped nanometer alpha-MnO2 grafted polyimide resin by adopting potassium hydroxide to obtain the sea urchin-shaped nanometer alpha-MnO2 in-situ modified porous carbon supercapacitor electrode material. By using the electrode material, the defects of MnO2 crystal lattices are improved, the conductivity and stability of electrons are improved, protons and the electrons can freelyflow among the crystal lattices, rapid transmission of ions and the electrons of an interface is guaranteed, the charge transfer path can be shortened, more active sites are provided for charge storage, the electron trapping and transfer capacity is enhanced, and the mechanical stability is also improved.

Description

technical field [0001] The invention relates to the field of composite electrode materials for supercapacitors, in particular to a supercapacitor electrode material and a preparation method thereof. Background technique [0002] Energy and the environment are the basis for the survival, development and development of human beings. The increasingly prominent energy and environmental crisis has attracted widespread attention from all over the world, and has become a key factor in the orientation of energy and technology in various countries. In order to achieve sustainable economic and social development, research on renewable and green energy storage devices has become a hot spot in current scientific research. [0003] Supercapacitor is an energy storage device between batteries and traditional electrostatic capacitors. It has high power density, no pollution, long cycle life and other excellent properties and is widely used. The existing supercapacitor electrode materials ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G45/02C01B32/318C01B32/348H01G11/24H01G11/30H01G11/34H01G11/46
CPCC01G45/02C01P2004/30C01P2006/40C01B32/318C01B32/348H01G11/24H01G11/30H01G11/34H01G11/46Y02E60/13
Inventor 袁峰
Owner 犀望新能源科技(昆山)有限公司
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