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Flexible electrode based on polyvinyl alcohol and preparation method of flexible electrode

A polyvinyl alcohol and flexible electrode technology, which is applied in the manufacture of hybrid capacitor electrodes and hybrid/electric double layer capacitors, etc., can solve problems such as poor hydrophilicity, unsuitable stretching, and limited improvement of electrode capacity, so as to achieve safety in the production process, Effects with low production cost and high flexibility

Active Publication Date: 2021-07-23
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the main material of this technical solution is PVDF, which has poor hydrophilicity and poor elasticity, it is not suitable for stretching, and it is easy to break under strong impact, which is a disadvantage for wearable devices.
Although the use of polyethylene glycol solves the problem of electrolyte immersion in the electrode, it also occupies a large proportion of volume and percentage, which limits the improvement of electrode capacity
In addition, there are literatures that use organic solvents. Although they can be recycled repeatedly, organic solvents are still used after all, and the protection level of industrial production will be improved.

Method used

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  • Flexible electrode based on polyvinyl alcohol and preparation method of flexible electrode
  • Flexible electrode based on polyvinyl alcohol and preparation method of flexible electrode
  • Flexible electrode based on polyvinyl alcohol and preparation method of flexible electrode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] (1) Put 1 g of polyvinyl alcohol, acetylene black and polyaniline into 10 mL of water after being ground and heated to 95°C while stirring, then heat-preserve and ultrasonically treat for 20 minutes to obtain a uniform slurry; the polyvinyl alcohol, acetylene black and polyaniline The mass ratio of aniline is 45:45:10;

[0040] (2) Add 60 μL of glutaraldehyde to the slurry, stir evenly, pour it into a glass petri dish with a diameter of 7 cm, heat it with a heating plate at 30°C to evaporate the water, and obtain a film;

[0041] (3) Soak the film obtained in step (2) in 10mL of 1M hydrochloric acid solution for 10min, then fully wash with water, and then properly cut to obtain such figure 1 The flexible electrodes shown, can then embed conductive carbon fibers in them to obtain elastic hydrogel electrodes, and as figure 2 As shown, the flexible electrode can be cut into various shapes and can be easily folded.

[0042] The conductivity of the flexible electrode prep...

Embodiment 2

[0045] (1) Grinding 0.1 g of polyvinyl alcohol, acetylene black, carbon nanotubes and nano-manganese dioxide powder, placed in 1.0 mL of water and heated to 95 ° C while stirring, and then heat-preserved and ultrasonically treated for 20 minutes to obtain a slurry; The mass ratio of polyvinyl alcohol, acetylene black, carbon nanotubes and nano manganese dioxide powder is 60:30:5:5;

[0046](2) Add 10 μL of glutaraldehyde to the slurry, stir evenly, pour it into 4 continuous electrode-shaped stainless steel tanks, insert several carbon fiber threads into the quick-drying material, and wait for the water to evaporate naturally;

[0047] (3) Soak the material obtained in step (2) in 10 mL of 1M sulfuric acid solution for 5 min, then fully wash with water, and then cut it appropriately to obtain an elastic hydrogel electrode made of the flexible electrode, as shown in Figure 4 As shown, the elastic hydrogel electrode can be folded multiple times.

[0048] The conductivity of the...

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Abstract

The invention discloses a flexible electrode based on polyvinyl alcohol and a preparation method of the flexible electrode. The flexible electrode is obtained by pouring and drying slurry, soaking in an acid solution for providing protons, washing with water and cutting, wherein the slurry is composed of polyvinyl alcohol, a conductive carbon material, an active substance and water. The flexible electrode disclosed by the invention is soft, curlable, foldable, elastic, capable of tolerating a certain degree of friction, has the performance of a supercapacitor, can charge and discharge charges, can increase the proportion of active substances according to needs, has large capacitance, can sense the change of the charges, and is very suitable for wearable equipment based on the flexible electrode.

Description

technical field [0001] The invention belongs to the technical field of flexible electrodes, and in particular relates to a flexible electrode based on polyvinyl alcohol and a preparation method thereof. Background technique [0002] With the development of mobile information technology and the improvement of people's living standards and production requirements, the needs and functions of wearable devices are becoming more and more important and prominent. Wearable devices are called people's second skin. Outside our bodies, they have the function of receiving our active and passive input command signals, realizing functional and intelligent functions, and bringing great benefits to all aspects of our production and life. A lot of convenience is now a hot spot in the development of electronic components. Therefore, people have put forward higher requirements for the convenience, safety, manufacturing process, and production cost of wearable devices. [0003] Wearable device...

Claims

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Application Information

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IPC IPC(8): H01G11/30H01G11/48H01G11/32H01G11/36H01G11/86
CPCH01G11/30H01G11/48H01G11/32H01G11/36H01G11/86Y02E60/13
Inventor 戴李宗吴章锋郭传銮缪仲熙许一婷袁丛辉曾碧榕陈国荣罗伟昂
Owner XIAMEN UNIV
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