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

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...

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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

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