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Preparation and testing method for supercapacitor based on strong-correlation oxide combined electrode

A technology for supercapacitors and composite electrodes, which is applied in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrodes, and electrochemical variables of materials. It can solve the problems of limited improvement in electrode conductivity and achieve excellent cycle stability and high specific surface area. , the effect of reducing resistance

Inactive Publication Date: 2015-11-11
JILIN UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Therefore, the improvement of the electrical conductivity of the overall electrode assembled by these low-dimensional nanostructures is still very limited, which still limits the popularization and application of transition metal oxides in supercapacitors with high power density, high energy density, and cycle stability.

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  • Preparation and testing method for supercapacitor based on strong-correlation oxide combined electrode
  • Preparation and testing method for supercapacitor based on strong-correlation oxide combined electrode
  • Preparation and testing method for supercapacitor based on strong-correlation oxide combined electrode

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Embodiment Construction

[0034] The specific embodiment of the present invention will be further elaborated below in conjunction with the accompanying drawings and specific embodiments of the description:

[0035] A method for preparing a supercapacitor based on a strongly correlated oxide composite electrode, the specific process is as follows:

[0036] a. The stainless steel metal substrate is fully cleaned in acid solution, deionized water and ethanol in sequence, and vacuum dried

[0037] b. Take an appropriate amount of 0.5-10% polystyrene colloidal solution and drop it on the stainless steel surface, and evaporate the colloidal solution to dryness under the environment of 35-90 ° C to make a polystyrene (PS) film, such as Figure 1a As shown, as a template for electrochemical deposition;

[0038] c. Preparation of three-dimensional nanoporous V 2 o 3 Conductive framework; a three-electrode system is adopted, the anode is a PS film based on stainless steel, the counter electrode is a platinum e...

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Abstract

The invention discloses a preparation and testing method for a supercapacitor based on a strong-correlation oxide combined electrode. The strong-correlation oxide combined electrode takes a polystyrene film as a template for the electrochemical deposition of a vanadium oxide conductive skeleton. After the polystyrene film is removed, vanadium oxide is taken as a template for the electrochemical deposition of a transition metal oxide, thereby obtaining a composite electrode. Electrodes meeting the requirements are symmetrically disposed at two sides of a diaphragm, thereby obtaining the supercapacitor. Finally, the assembled capacitor directly enters into Na2SO4 solution for electrochemical testing. The method is simple, and is easy to operate. The prepared supercapacitor is excellent in circulation stability, in large in power density, and is high in energy density.

Description

technical field [0001] The invention belongs to the technical field of supercapacitors, and in particular relates to a method for preparing and testing supercapacitors based on strongly correlated oxide composite electrodes. Background technique [0002] As a new type of green energy storage device, supercapacitors have very broad application prospects in hybrid electric vehicles, consumer electronics, aerospace and other fields. So far, various supercapacitors have been developed. In the process of research, researchers found that it is difficult to completely distinguish electric double layer capacitors from Faraday pseudocapacitors, and these two energy storage mechanisms often exist in the same capacitor. Therefore, the types of capacitors are usually classified according to the main energy storage mechanism among them. According to different energy storage principles, supercapacitors can be divided into electric double layer supercapacitors and Faraday pseudocapacitor...

Claims

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Application Information

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IPC IPC(8): H01G11/86H01G11/24H01G11/26H01G11/46H01G11/84G01N27/48
CPCY02E60/13
Inventor 郎兴友刘博天文子朱永福赵明李建忱蒋靑
Owner JILIN UNIV