Manganese dioxide/polypyrrole composite electrode free of binder, preparation method and application of manganese dioxide/polypyrrole composite electrode

A manganese dioxide and composite electrode technology, used in hybrid capacitor electrodes, hybrid/electric double-layer capacitor manufacturing, electrolytic coatings, etc., can solve the problems of low specific capacity and poor rate performance, improve utilization, and reduce overall resistance. , the effect of simplifying the preparation process

Inactive Publication Date: 2016-10-12
EAST CHINA UNIV OF SCI & TECH
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0005] In order to solve the shortcomings of low specific capacity and poor rate performance of the single manganese dioxide electrode material in the prior art in practical applications, the purpose of the present invention is to propose a method for preparing manganese dioxide / polypyrrole nanostructure composite electrode material , to overcome the limitation of manganese dioxide application

Method used

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  • Manganese dioxide/polypyrrole composite electrode free of binder, preparation method and application of manganese dioxide/polypyrrole composite electrode
  • Manganese dioxide/polypyrrole composite electrode free of binder, preparation method and application of manganese dioxide/polypyrrole composite electrode
  • Manganese dioxide/polypyrrole composite electrode free of binder, preparation method and application of manganese dioxide/polypyrrole composite electrode

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Embodiment 1

[0025] The cleaned nickel foam is cut into 1X2 cm 2 The size, immersed in 0.05 mmol / L potassium permanganate solution, transferred to the reaction kettle, placed in 160 0 In the oven of C, continue to react for 24 hours. After the reactor was naturally cooled to room temperature, it was washed with deionized water and absolute ethanol. Add 1 mol of potassium chloride and 0.05 mol of pyrrole into 1 L of deionized solution to form an electrolyte. The above-mentioned foamed nickel sheet loaded with manganese dioxide was immersed in the electrolyte, and the constant potential electrochemical deposition was carried out at a voltage of 0.9V for 60s, 120s, 180s, 240s, and 300s respectively.

Embodiment 2

[0027] The cleaned nickel foam is cut into 1X2 cm 2 Dip it into 0.05 mmol / L potassium permanganate solution, transfer it to the reaction kettle, put it in 160 0 In the oven of C, continue to react for 24 hours. After the reactor was naturally cooled to room temperature, it was washed with deionized water and absolute ethanol. Add 0.4 mol of disodium hydrogen phosphate, 0.3 mol of pyrrole and 0.002 mol of sodium perchlorate into 1 L of deionized solution to form a pyrrole electrolyte. The above-mentioned foamed nickel sheet loaded with manganese dioxide was immersed in the electrolyte, and the constant potential electrochemical deposition was carried out at a voltage of 0.9V for 60s, 120s, 180s, 240s, and 300s respectively.

[0028] The morphology of the manganese dioxide and the manganese dioxide / polypyrrole composite material prepared in Examples 1 and 2 above was characterized by a field emission scanning electron microscope (JEOL JSM-4800). figure 1 A scanning electron ...

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Abstract

The invention provides a preparation method of a manganese dioxide/polypyrrole composite electrode free of a binder. The method specifically comprises the steps of: employing a nickel foam current collector as a substrate, firstly, carrying out hydrothermal decomposition on potassium permanganate at a high temperature and making a manganese dioxide nanosheet array grow on a nickel foam skeleton; and immersing the nickel foam containing manganese oxide into an electrolyte containing pyrrole, carrying out constant potential electrochemical deposition and making polypyrrole evenly grow on the surface of a manganese dioxide sheet layer to obtain the nickel foam-loaded manganese dioxide/polypyrrole compound. Manganese dioxide directly grows on the nickel foam, so that use of the binder in the electrode preparation process can be effectively avoided; and internal resistance of the system is reduced. The wettability of the manganese dioxide electrode and the electrolyte can be improved by a polypyrrole film; and meanwhile, additional psedocapacitance is increased under the condition of not blocking an ion diffusion channel. The composite electrode material has good electrochemical property and is expected to have a good application prospect in the field of a super-capacitor material.

Description

technical field [0001] The invention belongs to the field of new energy materials, and in particular relates to the preparation of a manganese dioxide / polypyrrole composite electrode material, which can be used as an electrode material for supercapacitors. Background technique [0002] Supercapacitors, also known as electrochemical capacitors, are a new type of green energy storage components that have attracted widespread attention because of their higher power density than batteries and higher energy density than traditional electric double layer capacitors. Especially in recent years, with the continuous growth of global energy demand, the reserves of fossil fuels are decreasing day by day, and the environmental pollution caused by fossil fuels seriously affects the living environment of human beings. Therefore, the research and development of clean and renewable energy is becoming increasingly important. extremely important. Supercapacitors also have the characteristics...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/46H01G11/48H01G11/86C23C18/12C25D13/08
CPCY02E60/13H01G11/86C23C18/1216C23C18/1241C25D13/04H01G11/46H01G11/48
Inventor 程起林徐晨辉何颖周罗肖宁金凤
Owner EAST CHINA UNIV OF SCI & TECH
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