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Preparation method of nanoporous gold/manganese dioxide composite electrode material

A nanoporous gold and manganese dioxide technology, which is applied in the manufacture of hybrid capacitor electrodes, hybrid/electric double layer capacitors, etc., can solve the problems of low mechanical stability, poor electrical conductivity, and difficulty in reaching the specific capacitance value, etc., and achieve coating The effects of uniform controllability, good shape retention and good specific capacitance characteristics

Active Publication Date: 2018-01-23
NAT UNIV OF DEFENSE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the poor conductivity and low mechanical stability of manganese dioxide, it is difficult to achieve a high specific capacitance value.

Method used

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  • Preparation method of nanoporous gold/manganese dioxide composite electrode material
  • Preparation method of nanoporous gold/manganese dioxide composite electrode material
  • Preparation method of nanoporous gold/manganese dioxide composite electrode material

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preparation example Construction

[0025] A preparation method of nanoporous gold / manganese dioxide composite electrode material, comprising the following steps:

[0026] (1) Preparation of nanoporous gold films

[0027] choose Au 35 Ag 65 Alloy thin film (that is, atomic ratio of 7:13), cut the alloy thin film to an appropriate size, place the alloy thin film in a nitric acid solution with a concentration of 12M-16M (M is mol / L) at room temperature, and use chemical methods for dealloying treatment 30-120 minutes, thereby preparing a nanoporous gold film with a nanoporous structure. The nanoporous gold thin film has different pore size ranges with the change of dealloying time and the concentration of the dealloying etchant, and the average pore size is usually in the range of 30nm to 60nm, showing hierarchy under different process conditions. The prepared nanoporous gold film was first washed with deionized water, then washed with absolute ethanol, and then the clean nanoporous gold film was dried at room ...

Embodiment 1

[0031] A preparation method of the nanoporous gold / manganese dioxide composite electrode material of the present invention comprises the following steps:

[0032] (1) Preparation of nanoporous gold film: Au with a thickness of 100 nm was selected 35 Ag 65 Alloy thin film (atomic ratio), cut it to 1×1cm 2 size, the alloy thin film was placed in a 16M nitric acid solution at room temperature for dealloying treatment for 30 minutes, and after the dealloying was completed, a nanoporous gold thin film was obtained. The film was washed with deionized water for 30 minutes, replaced with deionized water and repeated for 4 times, and then washed with absolute ethanol. After cleaning, it was dried at room temperature for 12 hours for use. The obtained nanoporous gold film had the following microscopic morphology figure 1 As shown, the average pore size of the nanoporous gold film is 30 nm.

[0033] (2) Preparation of nanoporous gold / manganese dioxide composite electrode material: put...

Embodiment 2

[0035] A preparation method of the nanoporous gold / manganese dioxide composite electrode material of the present invention comprises the following steps:

[0036] (1) Preparation of nanoporous gold film:

[0037] Choose Au with a thickness of 100nm 35 Ag 65 Alloy thin film (atomic ratio), cut to 2×1cm 2 size, place the alloy film in a 12M nitric acid solution at room temperature for dealloying treatment for 90 minutes. After the dealloying is completed, a nanoporous gold film is obtained. The film is washed with deionized water for 30 minutes, and the deionized water is replaced for repeated cleaning. 4 times, then washed with anhydrous ethanol, cleaned and dried at room temperature for 12 hours for use. The average pore size of the nanoporous gold film is 50 nm.

[0038] (2) Preparation of nanoporous gold / manganese dioxide composite electrode material: put the dried nanoporous gold film into the reaction chamber of the atomic layer deposition equipment, pass nitrogen gas a...

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Abstract

The invention discloses a preparation method of a nanoporous gold / manganese dioxide composite electrode material. The preparation method includes the following steps: (1) taking and de-alloying an Au35Ag65 alloy film, and preparing a nanoporous gold film; and (2) processing the nanoporous gold film through an atomic layer deposition method, taking Mn(thd)3 and ozone as a precursor, controlling thereaction temperature at 150-250 DEG C, carrying out Mn(thd)3 pulsing, N2 cleaning, O3 pulsing and N2 cleaning, repeating the deposition for 500-5000 cycles, and uniformly depositing manganese dioxideon the inner and outer surfaces of the nanoporous gold film to get a nanoporous gold / manganese dioxide composite electrode material. The composite electrode material of the invention has good specific capacitance characteristic, a controllable structure and stable performance.

Description

technical field [0001] The invention belongs to the technical field of preparation of nanometer materials, in particular to a preparation method of nanoporous gold / manganese dioxide composite electrode material. Background technique [0002] Supercapacitor is a new type of energy storage device, which has the characteristics of high energy storage density, high output power, wide operating temperature range, long cycle life, etc. Utilize and store. High-performance electrodes are an important direction to improve the performance of supercapacitors. Metal oxide materials have high theoretical pseudocapacitance capacity and become ideal electrode materials for improving supercapacitive performance. As a typical material of base metal oxides, manganese dioxide has many advantages, such as high theoretical specific volume (1370F / g), low price, easy availability in large quantities and environmental friendliness. However, due to the poor conductivity and low mechanical stabili...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/86H01G11/36H01G11/46
Inventor 余金山李吉周新贵王洪磊刘海山
Owner NAT UNIV OF DEFENSE TECH
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