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A nanoporous al/au/mno 2 Electrode materials and supercapacitors prepared therefrom

A supercapacitor and nanoporous technology, which is applied in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrodes, etc., can solve the problems of poor adhesion and no discovery, and achieve the effect of improving adhesion

Active Publication Date: 2021-12-21
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the electrochemical deposition method, because the aluminum foil itself has Al 2 o 3 thin layer in electrodeposition solution system with MnO 2 Adhesion is poor, it is difficult to MnO 2 deposited directly onto aluminum foil, and no information was found on the direct deposition of MnO 2 coverage on foil

Method used

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  • A nanoporous al/au/mno <sub>2</sub> Electrode materials and supercapacitors prepared therefrom
  • A nanoporous al/au/mno <sub>2</sub> Electrode materials and supercapacitors prepared therefrom
  • A nanoporous al/au/mno <sub>2</sub> Electrode materials and supercapacitors prepared therefrom

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] (1) First cut the original aluminum foil into an area of ​​2.0×1.5cm 2 Then immerse these flakes of aluminum foil in acetone and alcohol solution to remove the grease on the surface, then use alcohol and deionized water to fully wash the aluminum foil, rinse it, and dry it for later use.

[0040] (2) Spray-plating on the aluminum foil for 5 minutes using ion plating equipment, forming an ultra-thin gold layer on the surface to obtain an Al / Au current collector. MnO 2 It is obtained by direct deposition on Al / Au current collector by electrochemical deposition three-electrode system. The deposition solution is 0.1mol / L Mn(CH 3 COO) 2 4H 2 O and 0.1mol / L Na 2 SO 4 mixture. The deposition is constant voltage deposition, the deposition voltage is +0.8V, and the deposition time is 400s. After deposition, the resulting Al / Au / MnO 2 The electrodes were fully washed with deionized water to remove residual electrolyte and dried at 80 °C for 30 min. The prepared electrode...

Embodiment 2

[0043] (1) First cut the original aluminum foil into an area of ​​2.0×1.5cm 2 The size of the sheet, and then dip these sheets of aluminum foil in acetone and alcohol solution to degrease the surface. Subsequently, the aluminum foil was immersed in a mixed acid solution with a molar ratio of hydrochloric acid and sulfuric acid of 1:1 for corrosion, and the corrosion time was 10s. Finally, the corroded aluminum foil is fully washed with alcohol and deionized water to remove residual acid, and dried for later use.

[0044] (2) Spray-plating on the corroded aluminum foil for 5 minutes by ion plating equipment, forming an ultra-thin gold layer on the surface to obtain an Al / Au current collector. MnO 2 It is obtained by direct deposition on Al / Au current collector by electrochemical deposition three-electrode system. The deposition solution is 0.1mol / L Mn(CH 3 COO) 2 4H 2 O and 0.1mol / L Na 2 SO 4 mixture. The deposition is constant voltage deposition, the deposition voltag...

Embodiment 3

[0047] (1) First cut the original aluminum foil into an area of ​​2.0×1.5cm 2 The size of the sheet, and then dip these sheets of aluminum foil in acetone and alcohol solution to degrease the surface. Subsequently, the aluminum foil was immersed in a mixed acid solution with a molar ratio of hydrochloric acid and sulfuric acid of 1:1 for corrosion, and the corrosion time was 20s. Finally, the corroded aluminum foil is fully washed with alcohol and deionized water to remove residual acid, and dried for later use.

[0048] (2) Spray-plating on the corroded aluminum foil for 5 minutes by ion plating equipment, forming an ultra-thin gold layer on the surface to obtain an Al / Au current collector. MnO 2 It is obtained by direct deposition on Al / Au current collector by electrochemical deposition three-electrode system. The deposition solution is 0.1mol / L Mn(CH 3 COO) 2 4H 2 O and 0.1mol / L Na 2 SO 4 mixture. The deposition is constant voltage deposition, the deposition voltag...

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Abstract

The invention discloses a nanoporous Al / Au / MnO 2 Electrode materials and supercapacitors prepared therefrom. The preparation steps of the electrode material are: corroding the aluminum foil with mixed acid to obtain a nanoporous structure and increase its specific surface area; sputtering a continuous ultra-thin gold layer on the acid-etched aluminum foil as a transition layer to obtain an Al / Au current collector. Deposition method to deposit nano-MnO on nanoporous Al / Au current collector 2 , to get Al / Au / MnO 2 electrode. The present invention adopts nanoporous current collector, MnO 2 Utilizing the autonomous growth of the porous framework, enhanced MnO 2 Mass loading of active material. Ultrathin Au layer significantly improves Al foil current collector and MnO in electrochemical deposition system 2 Adhesion between Al / Au / MnO 2 The electrode and the all-solid supercapacitor assembled from it have high specific capacitance, excellent rate characteristics, good cycle stability and excellent flexibility.

Description

technical field [0001] The invention belongs to the technical field of supercapacitors, in particular to a nanoporous Al / Au / MnO 2 Electrode materials and supercapacitors prepared therefrom. Background technique [0002] As an energy supply element, supercapacitors have excellent characteristics such as unique energy storage mechanism, low equivalent series resistance, high instantaneous current and long working life. Generally speaking, a typical supercapacitor is composed of current collector, active material, electrolyte and separator. Active materials provide energy storage capabilities for supercapacitors, so in order to obtain electrodes with high specific capacitance, researchers have invested a lot of energy in researching and preparing various active materials with nanostructures and high specific surface areas, such as Nanotubes, nanospheres, nanoflowers, etc. However, these preparation methods are usually relatively complicated and time-consuming. In fact, the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/86H01G11/24H01G11/30H01G11/46
CPCH01G11/24H01G11/30H01G11/46H01G11/86Y02E60/13
Inventor 卢振亚徐谦黄都
Owner SOUTH CHINA UNIV OF TECH
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