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Metal oxide material grown in situ on metal substrate at low temperature and application thereof

A metal-based, low-temperature in-situ technology, applied in the manufacture of hybrid/electric double-layer capacitors, hybrid capacitor electrodes, etc., can solve the problems of expensive carbon nanotubes, high energy consumption, and difficult to control the quality of active materials.

Inactive Publication Date: 2016-02-24
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, both Chinese patent CN103545122A and Chinese patent CN101923960A use manganese dioxide material and carbon material to compound to improve the conductivity of the electrode material, but the price of carbon nanotubes in the carbon material used in this method is relatively expensive, and the synthesis process requires high-temperature crystallization. high energy consumption, which is not conducive to large-scale production
Chinese patent CN104658765A grows electrode materials on a stainless steel non-woven fabric base by hydrothermal synthesis, and then roasts at high temperature to finally obtain the required electrode materials. This method requires hydrothermal high temperature and high temperature roasting, which consumes a lot of energy, and The quality of the active material on the current collector is not easy to control
And Chinese patent CN103065806A adopts the method for electrochemical deposition to deposit manganese dioxide on the nickel foam, but this method needs to use electric energy in the synthesis process, and the adhesion of manganese dioxide on the current collector is low simultaneously, and slag is serious, and It is not conducive to the control of manganese dioxide electrode materials grown on large-area foamed nickel
In addition, the Chinese patent CN103896208A uses a hydrothermal method to successfully grow manganese dioxide nanowires on a titanium substrate, but this synthesis process also requires high-temperature crystallization, high energy consumption, and increased production costs, which is not conducive to large-scale production

Method used

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  • Metal oxide material grown in situ on metal substrate at low temperature and application thereof
  • Metal oxide material grown in situ on metal substrate at low temperature and application thereof
  • Metal oxide material grown in situ on metal substrate at low temperature and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Dissolve 0.25g of manganese acetate in 50mL of deionized water, and then add N,N,N',N'-tetrakis(2-hydroxypropyl)ethylenediamine (the concentration of the obtained complexing agent is 0.04molL -1 ), the solution was stirred in a constant temperature water bath at 30°C for 20 minutes;

[0033] (2) immerse the treated foamed nickel substrate in the solution obtained in step (1);

[0034] (3) The concentration of 50mL is 0.13molL -1 Sodium hydroxide solution was slowly added dropwise (dropping rate 0.06mL / min) to the solution obtained in step (2) under stirring to obtain solution A;

[0035] (4) The concentration of 50mL is 0.06molL -1 Potassium persulfate solution was slowly added dropwise (dropping rate 0.06mL / min) into solution A under stirring, and stirred for 5 hours. After the reaction, the metal sheet was ultrasonically treated, and the manganese dioxide not grown on the substrate Removed, and finally obtained the supercapacitor electrode material of nickel fo...

Embodiment 2

[0037] (1) Dissolve 0.49g manganese acetate in 50mL deionized water, then add sodium edetate (the concentration of the complexing agent obtained is 0.10molL -1 ), the solution was stirred in a constant temperature water bath at 30°C for 20 minutes;

[0038] (2) immerse the treated foamed nickel substrate in the solution of step (1);

[0039] (3) The concentration of 30mL is 0.28molL -1 Sodium hydroxide solution was slowly added dropwise (dropping rate 0.08mL / min) to the solution of step (2) under stirring to obtain solution A;

[0040] (4) The concentration of 25mL is 0.12molL -1Potassium persulfate solution was slowly added dropwise (dropping rate 0.08mL / min) to solution A under stirring, and stirred for 12 hours. After the reaction, the metal sheet was ultrasonically treated to remove manganese dioxide not grown on the substrate. Finally, a supercapacitor electrode material with in-situ attached manganese dioxide on nickel foam was obtained. The powder sample scraped off...

Embodiment 3

[0042] (1) Dissolve 0.75g of manganese acetate in 50mL of deionized water, and then add N,N,N',N'-tetrakis(2-hydroxypropyl)ethylenediamine (the resulting concentration is 0.18molL -1 ), the solution was stirred in a constant temperature water bath at 30°C for 20 minutes;

[0043] (2) immerse the treated foamed nickel substrate in the solution of step (1);

[0044] (3) The concentration of 15mL is 0.41molL -1 Potassium hydroxide solution was slowly added dropwise (dropping rate 0.04mL / min) to the solution of step (2) under stirring to obtain solution A;

[0045] (4) The concentration of 25mL is 0.12molL -1 Ammonium persulfate solution was slowly added dropwise (dropping rate 0.04mL / min) to solution A under stirring, and stirred for 12 hours. After the reaction, the metal sheet was ultrasonically treated to remove manganese dioxide not grown on the substrate. Finally, a supercapacitor electrode material with in-situ attached manganese dioxide on nickel foam was obtained. The...

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Abstract

A metal oxide material grown in situ on a metal substrate (foamed nickel, a stainless steel mesh or a titanium plate) at low temperature and an application thereof in the aspect of super capacitor electrode materials belong to the technical field of super capacitor electrode material preparation. The invention aims to provide a hierarchical-pore metal oxide nanosheet array material which is grown in situ on a metal substrate at low temperature in one step. The material has the advantages of high specific capacity of capacitance, small internal resistance, and good cycle performance. In addition, the synthesis method is simple, the capacity of manganese dioxide on the metal substrate is easy to control, the process is simple, the production cost is low, industrialization is easy, and the material is of high potential economic value.

Description

technical background [0001] The invention belongs to the technical field of supercapacitor electrode material preparation, in particular to a metal oxide material grown in-situ at low temperature on a metal substrate (foam nickel, stainless steel mesh or titanium sheet) and its application in supercapacitor electrode materials. Background technique [0002] Energy occupies a very important position in human society. In the process of social development, the process of energy crisis and new energy discovery is constantly repeated. As a candidate device, supercapacitor plays an important role in the storage and utilization of new energy. A supercapacitor is an energy storage element that uses an electrochemical process on the surface of an electrode / solution to store charge, also known as an electrochemical capacitor. It has the advantages of fast charging and discharging, long life, wide working temperature window and good voltage memory, and is a new, efficient and practi...

Claims

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Application Information

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IPC IPC(8): H01G11/46H01G11/86
CPCY02E60/13H01G11/46H01G11/86
Inventor 张宗弢王润伟蒋尚
Owner JILIN UNIV