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A kind of preparation method of nickel foam/graphene/manganese dioxide three-layer structure electrode material

A three-layer structure, manganese dioxide technology, applied in the direction of hybrid/electric double layer capacitor manufacturing, hybrid capacitor electrodes, etc., can solve the problems of small specific surface area, poor conductivity, easy stacking, etc., to increase specific surface area and improve conductivity , the effect of improving conductivity

Active Publication Date: 2020-06-02
哈尔滨工大华策科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the technical problems of easy stacking, small specific surface area and poor conductivity of existing manganese dioxide electrode materials, and provides a preparation method of a nickel foam / graphene / manganese dioxide three-layer structure electrode material

Method used

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  • A kind of preparation method of nickel foam/graphene/manganese dioxide three-layer structure electrode material

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specific Embodiment approach 1

[0021] Specific embodiment one: the preparation method of a kind of nickel foam / graphene / manganese dioxide three-layer structure electrode material in this embodiment is specifically carried out according to the following steps:

[0022] 1. Dissolve the graphite oxide powder in deionized water, control the ultrasonic frequency to 60-100KHz, and ultrasonicate for 1-3 hours to form a precipitate, let it stand for 8-12 hours, take the upper layer, centrifuge and clean it, and put it in a temperature of 60-80 ° C. In an oven, dry for 4-8 hours to obtain a few-layer graphene oxide powder;

[0023] 2. Clean the nickel foam with concentrated hydrochloric acid ultrasonically to remove the NiO layer on the surface, then ultrasonically clean it with absolute ethanol, and then clean it with deionized water to obtain a nickel foam base, and put the nickel foam base into a polytetrafluoroethylene reactor ;

[0024] Three, the few-layer graphene oxide powder that step one obtains and KMnO ...

specific Embodiment approach 2

[0027] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the size of foamed nickel in step two is 1~9cm 2 . Others are the same as in the first embodiment.

specific Embodiment approach 3

[0028] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the mass concentration of concentrated hydrochloric acid in step 2 is 36% to 38%. Others are the same as in the first or second embodiment.

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Abstract

The invention relates to the preparation field of electrode materials, in particular to a preparation method of a foamed nickel / graphene / molybdenum dioxide three-layer structure electrode material. The preparation method aims to solve the technical problems that the existing molybdenum dioxide electrode material is liable to stack, the specific surface area is small and the conductivity is poor. The preparation method comprises the steps of using foamed nickel as a substrate, adopting graphene oxide and KMnO4 as raw materials, and preparing the foamed nickel / graphene / molybdenum dioxide three-layer structure electrode material by adopting a hydrothermal self-assembly method. A foamed nickel / graphene / molybdenum dioxide three-layer structure composite electrode prepared by adopting the preparation method has the advantages of large specific surface area, large capacitance value and good cycling stability, and has wide application prospect.

Description

technical field [0001] The invention relates to the field of preparation of electrode materials. Background technique [0002] With the depletion of fossil fuels, it is imminent to develop new green and efficient new energy sources and related energy storage devices. Supercapacitors, also known as electrochemical capacitors, are a new energy storage device with high power at the same time. At present, the biggest problem facing supercapacitors is their low energy density. As the core material for the development of supercapacitors, the performance of electrode materials directly determines the performance, stability, service life and cost of use of fuel cells. Traditionally used supercapacitors, such as pure carbon material capacitors, because the carbon material itself has no electrochemical activity, that is, the electrode material itself does not undergo electrochemical reactions during the charging and discharging process of the supercapacitor, and the capacity of the c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/86H01G11/26H01G11/28H01G11/46
CPCH01G11/26H01G11/28H01G11/46H01G11/86Y02E60/13
Inventor 刘胜男
Owner 哈尔滨工大华策科技有限公司