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Manganese dioxide film electrode with double 3-dimensional (3D) structures and preparation method thereof

A technology of manganese dioxide and thin-film electrodes, which is applied in the field of capacitors, can solve the problems of insufficient utilization of thin-film electrodes, achieve high utilization and specific capacity, increase contact area, and achieve good capacitance characteristics

Inactive Publication Date: 2012-05-02
GUILIN UNIV OF ELECTRONIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The manganese dioxide thin films prepared by these methods all have a 3D structure, but because the base material used—metal foil has a 2D structure, and these thin film preparation methods are not suitable for using a metal foam current collector with a 3D structure as the substrate, making the thin film electrode use The rate is still slightly insufficient

Method used

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  • Manganese dioxide film electrode with double 3-dimensional (3D) structures and preparation method thereof
  • Manganese dioxide film electrode with double 3-dimensional (3D) structures and preparation method thereof
  • Manganese dioxide film electrode with double 3-dimensional (3D) structures and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0023] will be like figure 1 1 part of nickel foam with obvious 3D structure is put into acetone, 0.1M hydrochloric acid and deionized water successively for cleaning, and it is ready for use after completion; 0.06 part of sodium lauryl sulfate is dissolved in 10 parts of deionized water, and 0.5 parts of potassium permanganate were dissolved in 20 parts of deionized water; 69.4 parts of deionized water and the above two aqueous solutions were added to the reactor, and then the cleaned foam nickel was also placed in the reactor; the reactor was sealed and placed Put it into an oven at 180° C. for 10 hours; after cooling naturally, take out the nickel foam and wash it to obtain the thin film electrode of the present invention.

[0024] Scanning electron microscope analysis was carried out on the surface of the film, and the results are detailed in figure 2 , it was found from the results that it has an obvious 3D structure. After the film was calcined at 280°C, X-ray analysi...

Embodiment 2

[0026] will be like figure 1 As shown, 2 parts of nickel foam with obvious 3D structure were put into acetone, 0.1M hydrochloric acid and deionized water to clean successively, and then used after completion; 0.1 part of sodium lauryl sulfate was dissolved in 10 parts of deionized water, and 1 part of potassium permanganate is dissolved in 20 parts of deionized water; 69 parts of deionized water and the above two aqueous solutions are added to the reactor, and then the cleaned foam nickel is also placed in the reactor; the reactor is sealed and placed Put it into an oven at 100°C to react for 24 hours; after blowing and cooling, take out the nickel foam and wash it to obtain the thin film electrode of the present invention.

[0027] The surface of the film was analyzed by scanning electron microscopy, and it was found that it had an obvious 3D structure. After the film was calcined at 300°C, X-ray analysis showed that it was α-MnO 2 . The prepared thin film electrode was pr...

Embodiment 3

[0029] will be like figure 1 As shown, 4 parts of foamed nickel with obvious 3D structure are put into acetone, 0.1M hydrochloric acid and deionized water successively for cleaning, and stand-by after completion; 0.15 parts of sodium lauryl sulfate are dissolved in 10 parts of deionized water, and 1.8 parts of potassium permanganate were dissolved in 20 parts of deionized water; 67 parts of deionized water and the above two aqueous solutions were added to the reactor, and then the cleaned foam nickel was also placed in the reactor; the reactor was sealed and placed Put it into an oven at 240° C. for 2.5 hours; after cooling naturally, take out the nickel foam and wash it to obtain the thin film electrode of the present invention.

[0030] The surface of the film was analyzed by scanning electron microscopy, and it was found that it had an obvious 3D structure. After the film was calcined at 300°C, X-ray analysis showed that it was α-MnO 2 . The prepared thin film electrode wa...

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Abstract

The invention discloses a manganese dioxide film electrode with double 3-dimensional (3D) structures for a super capacitor and a preparation method thereof. The manganese dioxide film electrode is formed by covering a manganese dioxide film in the 3D structure on a current collector of foam metals such as foam nickel and the like in the 3D structure. The preparation method comprises the step thatthe reaction is directly carried out on the current collector of foam metals such as foam nickel and the like through a hydro-thermal method for preparing the manganese dioxide film. The hydro-thermal preparation process comprises steps of current collector cleaning, solution preparation, hydro-thermal reaction and the like. The prepared manganese dioxide film electrode has double 3D structures and has good capacitance characteristics and higher energy storage characteristics when being used as an electrode of the super capacitor. Compared with the prior art, the prepared manganese dioxide film electrode for the super capacitor has larger contact area of active substance and electrolyte than that of the existing manganese dioxide electrode, and higher active substance utilization rate andhigher specific capacity are realized.

Description

technical field [0001] The invention belongs to the technical field of capacitors, and relates to a manganese dioxide film electrode with a double 3D structure and a preparation method thereof. Background technique [0002] Supercapacitor is a new type of energy storage element between traditional capacitors and batteries. It has extremely important and broad application prospects in mobile communications, information technology, industrial fields, consumer electronics, electric vehicles, aerospace and defense technologies, etc. , has become a research hotspot all over the world. According to different energy storage mechanisms, supercapacitors can be divided into electric double layer supercapacitors and pseudocapacitive supercapacitors. Pseudocapacitors can produce much higher capacity than the former and have attracted much attention. Although ruthenium oxide supercapacitors can obtain up to 863 Fg -1 specific capacity, but its high price limits its wide application. I...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/048
Inventor 徐华蕊颜东亮朱归胜杨会娟俞兆喆
Owner GUILIN UNIV OF ELECTRONIC TECH
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