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Method for preparing eggshell membrane/graphene/polymer composite flexible supercapacitor

A supercapacitor, graphene technology, applied in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrodes, etc., can solve the problem of no eggshell film/graphene/polymer flexible supercapacitor preparation method, etc., and achieve the cost of raw materials Low cost, improved specific capacitance, small volume

Active Publication Date: 2018-12-07
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, there is no report on the preparation of eggshell membrane / graphene / polymer flexible supercapacitors

Method used

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  • Method for preparing eggshell membrane/graphene/polymer composite flexible supercapacitor
  • Method for preparing eggshell membrane/graphene/polymer composite flexible supercapacitor

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Place the eggshell in 1M hydrochloric acid to remove the outer layer of CaCO 3 , to obtain eggshell membranes, wash them with acetone-ethanol mixture, and dry them at 50°C. The purified eggshell membrane was placed in ferric chloride solution, and after 2 hours, the pyrrole monomer was added dropwise in an ice-water bath. After 6 hours of reaction, the eggshell membrane / polypyrrole composite electrode was obtained, and the single electrode was measured by an electrochemical workstation. The specific capacitance Cs is 110F / g.

Embodiment 2

[0024] The post-treated eggshell membrane was purified eggshell membrane (1 × 1cm 2 ) in a 0.4wt% graphene oxide solution for 30 minutes by a simple impregnation method, add an appropriate amount of hydrazine hydrate to the prepared eggshell membrane / graphene oxide, adjust the pH of the solution to about 10 with ammonia water, and react for 1-3 hours to obtain the eggshell membrane / graphene oxide Shell membrane / graphene. After drying, it was immersed in ferric chloride solution for 24 hours, then pyrrole monomer was added dropwise, and reacted in an ice-water bath for 6 hours to obtain eggshell membrane / graphene / polypyrrole composite material. Take two electrode materials of equal mass, use PVA-phosphoric acid as the electrolyte, and assemble them into a "sandwich" solid supercapacitor. The specific capacitance Cs of the single electrode is 152F / g measured by an electrochemical workstation.

Embodiment 3

[0026] The post-treated eggshell membrane was purified eggshell membrane (1 × 1cm 2 ) was immersed in 0.4wt% graphene oxide solution for 60 minutes by a simple impregnation method, and an appropriate amount of hydrazine hydrate was added to the prepared eggshell membrane / graphene oxide, and the pH of the solution was adjusted to about 10 with ammonia water, and the reaction was carried out for 1-3 hours to obtain eggshell membrane / graphene oxide. Shell membrane / graphene. After drying, it was immersed in ferric chloride solution for 24 hours, then pyrrole monomer was added dropwise, and reacted in an ice-water bath for 6 hours to obtain eggshell membrane / graphene / polypyrrole composite material. Take two electrode materials of equal mass, use PVA-phosphoric acid as the electrolyte, and assemble them into a "sandwich" solid supercapacitor. The specific capacitance Cs of the single electrode measured by the electrochemical workstation is 196F / g.

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Abstract

The invention relates to a method for preparing a flexible supercapacitor which combines a graphene oxide / polymer with a protein membrane as a flexible substrate. Firstly, the graphene oxide is uniformly dispersed ultrasonically, and a purified eggshell membrane is completely immersed in the graphene oxide solution; the graphene oxide is self-assembled on a surface of the eggshell membrane under ahydrothermal condition, and the polymer is grown on the reduced eggshell membrane / the graphene substrate; the composite eggshell membrane is washed and dried, and the flexible supercapacitor is assembled in a "sandwich" structure by using the PVA-phosphoric acid as an electrolyte and the filter paper as a separator. The method for preparing the eggshell membrane / graphene / polymer composite flexible supercapacitor is simple, and the raw material cost is low; the prepared supercapacitor has a large specific capacitance, and can effectively construct a transmission resistor; and electron transmission is facilitated in the electrolyte, and the electrochemical performance of the flexible supercapacitor is improved.

Description

technical field [0001] The invention relates to the technical field of flexible supercapacitors, in particular to a method for preparing eggshell membrane / graphene / polymer composite flexible supercapacitors. Background technique [0002] Due to the development of wearable electronic devices, people's requirements for flexible energy storage devices are gradually increasing. Flexible supercapacitors must be light, cheap, flexible, stretchable, and maintain their functions even after repeated deformation. Natural synthetic fibers have an ideal uniaxial structure, which makes them have excellent mechanical properties. In addition, fibers can be assembled into porous membranes with multiple nanostructures. At the same time, researchers have developed 3D support materials as the substrate of flexible supercapacitors, which can increase the speed of electron transmission and ion diffusion. The disadvantage is that the production process is complicated, and some require a large amo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/84H01G11/86H01G11/30H01G11/36H01G11/48
CPCH01G11/30H01G11/36H01G11/48H01G11/84H01G11/86Y02E60/13
Inventor 金玲查杰诚陈至立翟春雨夏友谊张贺新乔红斌张奎何利芳高宏雷智平吴胜华
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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