A preparation method of polyaniline/manganese dioxide electrode material with three-dimensional network structure

A manganese dioxide electrode and network structure technology, applied in the field of electrochemical energy storage, can solve the problems of short cycle life, easy expansion and contraction, poor conductivity of manganese dioxide, etc., to improve stability, overcome expansion and contraction, The effect of the simple and easy preparation method

Active Publication Date: 2021-01-08
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, they have some inherent defects, such as poor conductivity of manganese dioxide and instability in acidic electrolytes; polyaniline is prone to expansion and contraction during charge and discharge, resulting in short cycle life, etc.
In order to solve the above problems, researchers have developed various polyaniline / manganese dioxide composite materials. These composite materials have good electrochemical energy storage properties, but the more complicated preparation methods will hinder their commercial application to some extent.

Method used

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  • A preparation method of polyaniline/manganese dioxide electrode material with three-dimensional network structure

Examples

Experimental program
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Effect test

Embodiment 1

[0019] Dissolve 1.0g of polyvinyl alcohol completely in 20mL of deionized water under heating conditions, cool naturally, and set aside. Put the prepared polyvinyl alcohol aqueous solution in an ice-water bath and stir, then add 2.07g of aniline hydrochloride, 0.05g of boric acid, and 1.27g of potassium permanganate in sequence, stir evenly, and let it stand at room temperature for a certain period of time. The reaction product is placed in a large amount of deionized water purification equilibrium to remove oligomers and inorganic substances, and the polyaniline / manganese dioxide electrode material can be obtained.

Embodiment 2

[0021] Dissolve 1.0 g of polyvinyl alcohol completely in 20 mL of deionized water at 90° C., cool naturally, and set aside for use. Put the prepared polyvinyl alcohol aqueous solution in an ice-water bath and stir, then add 1.65g of aniline hydrochloride, 0.05g of boric acid, and 1.27g of potassium permanganate in sequence, stir evenly, and let it stand at room temperature for a certain period of time. The reaction product is placed in a large amount of deionized water purification equilibrium to remove oligomers and inorganic substances, and the polyaniline / manganese dioxide electrode material can be obtained.

Embodiment 3

[0023] Dissolve 1.0 g of polyvinyl alcohol completely in 20 mL of deionized water at 90° C., cool naturally, and set aside for use. Put the prepared polyvinyl alcohol aqueous solution in an ice-water bath and stir, then add 2.07g of aniline hydrochloride, 0.05g of boric acid, 1.27g of potassium permanganate, and 1.82g of ammonium persulfate in sequence. time. The reaction product is placed in a large amount of deionized water purification equilibrium to remove oligomers and inorganic substances, and the polyaniline / manganese dioxide electrode material can be obtained.

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Abstract

The invention discloses a preparation method of polyaniline / manganese dioxide electrode material with enhanced three-dimensional network structure. The preparation method reacts aniline hydrochloride, crosslinking agent and permanganate in polyvinyl alcohol aqueous solution to obtain polyaniline / manganese dioxide electrode material. In the preparation method of the invention, during the preparation of the electrode material, the polyaniline / manganese dioxide electrode material with a reinforced three-dimensional network structure is obtained due to the introduction of polyvinyl alcohol and a crosslinking agent. This enhanced three-dimensional network structure can not only overcome the expansion and contraction of polyaniline during charging and discharging, but also form a good protection for manganese dioxide, thereby improving the stability of electrode materials; and all raw materials only need to be added in sequence After the system is mixed evenly, it can be allowed to stand still for reaction. During the standing reaction, polyaniline is formed by oxidative polymerization while the oxidizing agent is reduced to manganese dioxide. The preparation method is simple and easy.

Description

technical field [0001] The invention relates to the technical field of electrochemical energy storage, in particular to a method for preparing a polyaniline / manganese dioxide electrode material with a reinforced three-dimensional network structure. Background technique [0002] In recent years, due to the serious environmental problems caused by the huge consumption of non-renewable fossil fuels, people's demand for clean and sustainable energy has become increasingly urgent. Supercapacitors are new electrochemical energy storage devices that have attracted much attention in the past decade. Compared with batteries and traditional capacitors, they have the characteristics of high power density, long cycle life and fast charge and discharge. Therefore, supercapacitors have been widely used in the fields of electric vehicles, mobile electronics and uninterrupted energy supply. According to the storage mechanism, supercapacitors can be roughly divided into two types: (1) elect...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/24H01G11/48H01G11/46
CPCH01G11/24H01G11/46H01G11/48Y02E60/13
Inventor 李成陈仁鹏黄华波李亮张伟方元飞杨帅裔刘玉兰
Owner WUHAN INSTITUTE OF TECHNOLOGY
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