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Composite electrode super capacitor and method for preparing same

A technology of supercapacitors and composite electrodes, applied in electrolytic capacitors, capacitors, capacitor electrodes, etc., can solve the problems of no obvious improvement in the performance of composite electrodes, inability to make full use of graphene, uneven mixing, etc., to achieve high energy density, production Low cost, low cost effect

Inactive Publication Date: 2012-02-15
GUIZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the course of the research, it was found that graphene is prone to clustering, uneven mixing, and the excellent performance of graphene cannot be fully utilized, resulting in no significant improvement in the performance of the composite electrode.

Method used

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  • Composite electrode super capacitor and method for preparing same
  • Composite electrode super capacitor and method for preparing same

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Experimental program
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Effect test

Embodiment 1

[0022] Embodiment 1 of the present invention: the structure of composite electrode supercapacitor is as figure 1 As shown, including diaphragm 1 and electrolyte 2, a porous polypropylene film is used as the diaphragm 1, and its thickness is 100 μm; sulfuric acid solution is used as the electrolyte 2; the electrolyte 2 is on both sides of the diaphragm 1, and a composite electrode is arranged on the outside of the electrolyte 2 3. The composite electrode 3 is composed of a collector electrode 5, a graphene layer 6 and a ruthenium dioxide layer 7. The graphene layer 6 covers the inner surface of the collector electrode 5, and the ruthenium dioxide layer 7 covers the inner surface of the graphene layer 6. On, the inner surface of the ruthenium dioxide layer 7 is in contact with the electrolyte 2; a sealant 4 is provided at both ends of the diaphragm 1, the electrolyte 2 and the composite electrode 3;

[0023] The preparation method of the composite electrode supercapacitor adopts...

Embodiment 2

[0024] Embodiment 2 of the present invention: the structure of composite electrode supercapacitor is as figure 1 As shown, including diaphragm 1 and electrolyte 2, a glass fiber porous film is used as the diaphragm 1 with a thickness of 8 μm; a hydrochloric acid solution is used as the electrolyte 2; the electrolyte 2 is located on both sides of the diaphragm 1, and a composite electrode 3 is provided on the outside of the electrolyte 2 , composite electrode 3 is made up of collector electrode 5, graphene layer 6 and ruthenium dioxide layer 7, and graphene layer 6 is covered on the inside surface of collector electrode 5, and ruthenium dioxide layer 7 is covered on the inside surface of graphene layer 6 , the inner surface of the ruthenium dioxide layer 7 is in contact with the electrolyte 2; a sealant 4 is provided at both ends of the diaphragm 1, the electrolyte 2 and the composite electrode 3;

[0025] The preparation method of composite electrode supercapacitor adopts copp...

Embodiment 3

[0026] Embodiment 3 of the present invention: the structure of composite electrode supercapacitor is as figure 1 As shown, including a diaphragm 1 and an electrolyte 2, nitric acid solution is used as the electrolyte 2, the electrolyte 2 is on both sides of the diaphragm 1, and a composite electrode 3 is provided on the outside of the electrolyte 2, and the composite electrode 3 is composed of a collector electrode 5, a graphene layer 6 and The ruthenium dioxide layer 7 is formed, the graphene layer 6 is covered on the inner surface of the collector electrode 5, the ruthenium dioxide layer 7 is covered on the inner surface of the graphene layer 6, and the inner surface of the ruthenium dioxide layer 7 is in contact with the electrolyte 2; A sealant 4 is provided at both ends of the diaphragm 1, the electrolyte 2 and the compound electrode 3; the diaphragm 1 is an ion-permeable membrane with a thickness of 200 μm.

[0027] The preparation method of the composite electrode superca...

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Abstract

The invention discloses a composite electrode super capacitor, which comprises a diaphragm and electrolytes, wherein the electrolytes are positioned on two sides of the diaphragm; composite electrodes are arranged outside the electrolytes and consist of collectors, graphene layers and ruthenium dioxide layers; the graphene layers cover internal surfaces of the collectors; the ruthenium dioxide layers cover the internal surfaces of the graphene layers; the internal surfaces of the ruthenium dioxide layers are contacted with the electrolytes; and sealing adhesives are arranged at both ends of the diaphragm, the electrolytes and the composite electrodes. The structure that the composite electrodes consist of the collectors, the graphene layers and the ruthenium dioxide layers has the characteristics of large specific surface area of graphene and large specific capacity of ruthenium dioxide and has the advantages of a mixture of the graphene and the ruthenium dioxide. Amorphous ruthenium dioxide hydrate is obtained by coating wet gel on the surface of the graphene, the use of noble metal ruthenium can be effectively controlled, the using amount of the ruthenium is reduced, and production cost is saved.

Description

technical field [0001] The invention relates to a capacitor and a preparation method thereof, in particular to a composite electrode supercapacitor and a preparation method thereof. Background technique [0002] Supercapacitors, also known as electrochemical capacitors or large-capacity capacitors, are a new type of energy storage device between traditional capacitors and batteries. redox reactions to store energy. Supercapacitors can store more than 10 times the energy of conventional capacitors while having a power density 10 to 100 times higher than batteries. It has the characteristics of short charging time, long service life, good temperature characteristics, energy saving and environmental protection. Supercapacitors not only have potential application value in electric vehicles, but also are widely used in communication, industry and other fields as backup power supply and independent power supply. As high pulse current generators, they will also play an important ...

Claims

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Application Information

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IPC IPC(8): H01G9/04H01G9/08H01G9/02
CPCY02E60/13
Inventor 邓朝勇石健马亚林崔瑞瑞
Owner GUIZHOU UNIV
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