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A kind of supercapacitor electrode material and preparation method thereof

A technology for supercapacitors and electrode materials, applied in the field of electrochemical materials, can solve the problems of complex preparation methods and limited improvement of electrode activity, and achieve the effects of simple preparation methods, changes in organizational structure and electrochemical properties, and improvement in specific capacitance

Active Publication Date: 2019-05-28
XIAMEN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, the binary oxide of ruthenium is usually deposited by hydrothermal method or sputtering method to improve the activity of the electrode. However, the above-mentioned preparation method is complicated and has limited improvement in the activity of the electrode.

Method used

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  • A kind of supercapacitor electrode material and preparation method thereof
  • A kind of supercapacitor electrode material and preparation method thereof
  • A kind of supercapacitor electrode material and preparation method thereof

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preparation example Construction

[0024] A kind of preparation method of above-mentioned supercapacitor electrode material, comprises the following steps:

[0025] S1, performing surface etching treatment on the metal substrate;

[0026] S2, respectively configure the metal salt solutions of Mn, Co and Ru, and then mix and dissolve the metal salt solutions of Mn, Co and Ru in ethanol according to the molar ratio of Mn, Co and Ru, respectively, to obtain a composite metal salt solution;

[0027] S3, coating the composite metal salt solution on the surface of the metal substrate after surface etching treatment, drying and curing, and thermal oxidation treatment at 290-310° C. for 30-50 minutes.

[0028] Further, in a preferred embodiment of the present invention, the surface etching treatment step of the metal substrate includes: placing the metal substrate in an oxalic acid solution with a mass fraction of 8-15%, treating for 1-4 hours, cleaning and drying. After acid etching, the oxide film on the surface of ...

Embodiment 1

[0041] A kind of supercapacitor electrode material that the present embodiment provides, it is prepared according to the following steps:

[0042] (1) Put the titanium substrate in an oxalic acid solution with a mass fraction of 10%, heat it on an electric furnace until the solution boils for 3 hours, take it out, wash it, and dry it for later use.

[0043] (2) Prepare MnCl of 1mol / L concentration respectively 2 、CoCl 3 、RuCl 3 The solution, according to the mole percentage of Ru:Co:Mn is 4:3:3 prepare above-mentioned metal salt solution, dissolve it in ethanol and mix uniformly in ultrasonic, obtain composite metal oxide solution, wherein, composite metal oxide solution The total metal ion concentration in the medium is 0.5mol / L.

[0044] (3) Apply the prepared composite metal solution evenly on the titanium substrate, dry and solidify, anneal at 290°C, 300°C, and 310°C for 30 minutes, take it out, and cool.

[0045] Such as figure 1 Shown is the SEM image of the superca...

Embodiment 2

[0048] A kind of supercapacitor electrode material that the present embodiment provides, it is prepared according to the following steps:

[0049] (1) Put the titanium substrate in an oxalic acid solution with a mass fraction of 10%, heat it on an electric furnace until the solution boils for 3 hours, take it out, wash it, and dry it for later use.

[0050] (2) Prepare MnCl of 1mol / L concentration respectively 2 、CoCl 3 、RuCl 3 According to the molar percentage of Ru:Co:Mn of 4:2:4, 4:3:3, 4:4:2, 4:5:1, prepare the above metal salt solution, dissolve it in ethanol and ultrasonically and mixed uniformly to obtain a composite metal oxide solution, wherein the total metal ion concentration in the composite metal oxide solution is 0.5 mol / L.

[0051] (3) Apply the prepared composite metal solution evenly on the titanium substrate, dry and solidify, anneal at 300°C for 30min, take it out, and cool it down.

[0052] As shown in Table 1, it is the specific capacitance value of th...

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Abstract

The invention provides a supercapacitor electrode material and a preparation method therefor, and relates to the electrochemical technical field. The supercapacitor electrode material comprises a metal substrate and a composite metal oxide coating layer formed on the surface of the metal substrate; and the composite oxide coating layer comprises MnO<2>, Co<3>O<4> and RuO<2>, wherein Mn, Co and Ruare at the molar ratio of (1-4) to (2-5) to 4. The preparation method comprises the steps of performing etching on the metal substrate, and performing configuration to obtain a composite metal salt solution of Mn, Co and Ru; and coating the metal substrate with the composite metal salt solution, and performing heat oxidization treatment at a temperature of 290-310 DEG C for 30-50min. The preparation method is simple and easy to operate, and the prepared electrode material can effectively reduce usage of ruthenium and has quite high specific capacitance value and wide market application prospect.

Description

technical field [0001] The invention relates to the field of electrochemical materials, and in particular to a supercapacitor electrode material and a preparation method thereof. Background technique [0002] Due to its specific power and specific capacity much higher than that of batteries, supercapacitors will be widely valued as a new type of electrochemical energy storage device. Supercapacitors with high energy density and their key materials have always been a hot spot in research and development. . [0003] Supercapacitors are usually divided into double-layer capacitors and Faraday quasi-capacitors. The electrode materials of the two are high specific surface area carbon materials, transition metal oxides and conductive polymers. Metal oxides can obtain high pseudocapacitance based on their own redox reactions, RuO 2 The material electrode has good characteristics of high specific capacity and low resistivity, using RuO 2 Supercapacitors made of materials have ver...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/46H01G11/86
CPCY02E60/13
Inventor 麻季冬朱君秋连志翔吴杭健张栋兴张厚安
Owner XIAMEN UNIV OF TECH
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