Preparation method of flexible supercapacitor, and preparation method of electrode and diaphragm thereof

A supercapacitor, flexible technology, applied in the field of energy storage, can solve the problems of electrode and/or separator edge material loss, reduce monomer production efficiency, increase assembly process and other problems, achieve excellent flexibility and processing performance, good elasticity, avoid cutting The effect of edge loss

Active Publication Date: 2019-03-12
DONGGUAN DONGYANG SOLAR SCI RES & DEV CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] It can be seen that although different preparation methods of supercapacitors are disclosed in the prior art, there is a problem of edge material loss due to cutting in electrodes and / or diaphragms, resulting in waste of materials and increased costs
And when assembling the electrodes and / or diaphragms into a supercapacitor monomer, it is necessary to impregnate the cell with electrolyte, which leads to an increase in the assembly process of the monomer and reduces the production efficiency of the monomer

Method used

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  • Preparation method of flexible supercapacitor, and preparation method of electrode and diaphragm thereof
  • Preparation method of flexible supercapacitor, and preparation method of electrode and diaphragm thereof
  • Preparation method of flexible supercapacitor, and preparation method of electrode and diaphragm thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0041] 1) Add 300 grams of polymethyl acrylate, 150 grams of 1-butyl-3-methylimidazolium tetrafluoroborate, 450 grams of graphene, 50 grams of conductive carbon black, and 50 grams of polytetrafluoroethylene into a 5L internal mixer After mixing evenly in the medium, slowly add 2025 grams of water and continue mixing to form a gel electrode mixture;

[0042] 2) Add 300 grams of polymethyl acrylate, 150 grams of 1-butyl-3-methylimidazolium tetrafluoroborate, 450 grams of aluminum oxide powder, and 50 grams of polytetrafluoroethylene into a 5L internal mixer and mix well Afterwards, slowly add 1690 grams of water and continue to mix into a gel-state septum mixture;

[0043] 3) According to the size of the electrode and diaphragm, respectively as figure 1 and figure 2 , to prepare the forming mold, respectively as image 3 and Figure 4 As shown, the gel electrode mixture and the gel state diaphragm mixture obtained in step 1) and step 2) are respectively put into the moldin...

Embodiment 2

[0047] 1) Add 300 grams of polymethyl acrylate, 150 grams of 1-butyl-3-methylimidazolium hexafluorophosphate, 450 grams of graphene, 50 grams of conductive carbon black, and 50 grams of polytetrafluoroethylene into a 5L internal mixer After mixing evenly, slowly add 2170 grams of acetonitrile to continue mixing to form a gel-state electrode mixture;

[0048] 2) Add 300 grams of polymethyl acrylate, 150 grams of 1-butyl-3-methylimidazolium hexafluorophosphate, 450 grams of aluminum oxide powder, and 50 grams of polytetrafluoroethylene into a 5L internal mixer and mix evenly , slowly add 1810 grams of acetonitrile and continue to mix into a gel-state septum mixture;

[0049] All the other 3), 4), and 5) steps are the same as in Example 1.

Embodiment 3

[0051] 1) 300 grams of polymethyl acrylate, 150 grams of 1-ethyl-3-picoline bis(trifluoromethylsulfonyl)imide, 450 grams of graphene, 50 grams of conductive carbon black, 50 grams of polytetrafluoroethylene Add vinyl fluoride to a 5L internal mixer and mix evenly, then slowly add 1960 grams of acetonitrile and continue mixing to form a gel-state electrode mixture;

[0052] 2) Add 300 grams of polymethyl acrylate, 150 grams of 1-butyl-3-picoline bis(trifluoromethylsulfonyl)imide, 450 grams of aluminum oxide powder, and 50 grams of polytetrafluoroethylene After mixing evenly in the 5L internal mixer, slowly add 1620 grams of acetonitrile to continue mixing to form a gel-state diaphragm mixture;

[0053] All the other 3), 4), and 5) steps are the same as in Example 1.

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Abstract

The invention relates to a preparation method of a flexible supercapacitor, and a preparation method of an electrode and a diaphragm thereof. The method comprises the following steps: designing the sizes of the electrode and the diaphragm, and customizing a forming mould, respectively loading a gel state electrode mixture and a gel state diaphragm mixture into the forming mould, pushing and extruding a gel state material from one side of the forming mould, after the gel state material is extruded from the other side to a fixed thickness, slicing the gel state material with the extruded fixed thickness by using a cut-off knife to obtain a flexible electrode and a flexible diaphragm, then stacking the flexible electrode and the flexible diaphragm to form a capacitor cell, and drying and packaging the capacitor cell to obtain the flexible supercapacitor. By adoption of the above method provided by the invention, the trimming loss of the flexible electrode and the flexible diaphragm in the cutting process is avoided; the flexible electrode has good tensile strength, high deformation rate and high electrical conductivity; the flexible diaphragm has good elasticity, large tensile strength and high deformation rate; and the flexible supercapacitor product has high production efficiency, good bending performance and wide electrochemical window.

Description

technical field [0001] The invention relates to the field of energy storage technology, in particular to a method for preparing a flexible supercapacitor and its electrodes and diaphragm. Background technique [0002] In the traditional process of mass production of carbon electrodes for supercapacitors, as described in Japanese Patent JP2010171346A, the active material, conductive agent, and binder are usually uniformly mixed in a solvent to form a slurry, and then the prepared slurry is sequentially After coating, drying and rolling process, the electrode can be obtained. Since the electrode contains a metal current collector, the flexibility of the electrode is limited by the hardness of the metal, and when using such an electrode, it is necessary to cut the electrode into a size that meets the design requirements. During the cutting process, it is inevitable to produce edges. Material loss, resulting in waste. In addition, when such electrodes and separators are used t...

Claims

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Application Information

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IPC IPC(8): H01G11/84H01G11/52H01G11/86
CPCH01G11/52H01G11/84H01G11/86Y02E60/13
Inventor 何凤荣郭义敏郭德超张啟文龙超昝亚辉慈祥云
Owner DONGGUAN DONGYANG SOLAR SCI RES & DEV CO LTD
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