Super capacitor

A technology of supercapacitors and internal electrodes, applied in the directions of winding capacitors, electrolytic capacitors, hybrid capacitor terminals, etc., can solve the problems of high internal resistance, high internal resistance, low energy storage density, etc., and achieve high energy density and high voltage window. Effect

Inactive Publication Date: 2021-06-01
TSINGHUA UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, during stretching and bending, the two electrodes are geometrically separated from each other, resulting in high internal resistance and degraded electrochemical performance.
However, coaxial fiber-shaped supercapacitors can overcome the shortcoming of high internal resistance. Patent CN103400702B discloses an elastic coaxial supercapacitor. The inner and outer electrodes are coaxially wound, but since the inner and outer electrodes are drawn by carbon nanotubes The film is composed of a symmetrical structure, and the voltage window of the obtained supercapacitor is only 1.0V, and the energy storage density is low

Method used

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Embodiment Construction

[0031] The supercapacitor provided by the present invention will be further described below in conjunction with specific embodiments and drawings.

[0032] see figure 1 , The first embodiment of the present invention provides a supercapacitor 10 , including an elastic body 11 , the outer surface of the elastic body 11 wraps an inner electrode 12 , a first electrolyte layer 13 and an outer electrode 14 in sequence. The internal electrode 12 includes a carbon nanotube film and a NiO@MnO X composite structure; the external electrode 14 includes a carbon nanotube film and an Fe 2 o 3 granular layer.

[0033] The elastic body 11 is an elastic linear structure, specifically, the elastic body 11 may be an elastic cord, elastic fiber, or the like. The elongation rate of the elastic body 11 can reach 200%, and the elastic body 11 is a flexible structure, which can be bent and folded arbitrarily. In this embodiment, the elastic body 11 is an elastic fiber, and the diameter of the e...

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Abstract

The invention relates to a super capacitor which comprises an elastomer, an inner electrode, a first electrolyte layer and an outer electrode, the inner electrode, the first electrolyte layer and the outer electrode sequentially wrap the outer surface of the elastomer, the inner electrode comprises a first carbon nanotube layer and a NiO@MnOX composite structure, and the outer electrode comprises a second carbon nanotube layer and a Fe2O3 particle layer.

Description

technical field [0001] The invention relates to a supercapacitor, in particular to a coaxial elastic supercapacitor. Background technique [0002] With the emergence of wearable and portable electronic devices, fibrous supercapacitors have attracted extensive attention due to their small size, light weight, and one-dimensional structure that can be easily woven into clothing. However, when the fibrous supercapacitor is to be applied to wearable devices, it needs to have certain flexibility. In the prior art, research on elastic fiber-shaped supercapacitors is usually formed by helically winding two electrodes wrapped with electrolyte. For fibrous supercapacitors with a helical structure, there is not enough direct contact area between electrodes. Therefore, during stretching and bending, the two electrodes are geometrically separated from each other, resulting in high internal resistance and degraded electrochemical performance. However, the coaxial fiber-shaped supercapa...

Claims

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Application Information

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IPC IPC(8): H01G11/24H01G11/26H01G11/36H01G11/46H01G11/58
CPCH01G11/24H01G11/26H01G11/36H01G11/46H01G11/58B82Y30/00H01G11/74Y02E60/13H01G11/28H01G4/32H01G11/40
Inventor 原华王广吴扬魏洋张跃钢范守善
Owner TSINGHUA UNIV
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