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Flexible self-supporting porous electrode, preparation method thereof and application thereof

A porous electrode, self-supporting technology, used in hybrid capacitor electrodes, hybrid/electric double-layer capacitor manufacturing, etc., can solve the problems of hindered ion and electron transport, poor capacity, etc., and is conducive to wetting and ion transport. Energy density, simple process effect

Active Publication Date: 2018-06-05
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the structure of the electrode material and the structure of the electrode are equally important to the performance of the battery. In a denser structure, the transport of ions and electrons is hindered, and the capacity is not well developed.

Method used

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  • Flexible self-supporting porous electrode, preparation method thereof and application thereof
  • Flexible self-supporting porous electrode, preparation method thereof and application thereof
  • Flexible self-supporting porous electrode, preparation method thereof and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Dissolve 0.44g of PVDF-HFP in 31g of N-methylpyrrolidone (NMP), stir until it is completely dissolved, add 0.55g of Super P, stir for 10min, then add 4.5g of activated carbon, stir for 4h to form a uniform slurry, adjust with a scraper To 400μm, scrape the electrode on the glass plate, then place the glass plate in water, after the electrode is separated from the glass plate, freeze the electrode in the refrigerator for 12 hours, and dry it in a freeze dryer for 12 hours to obtain Electrodes with a porous structure, such as attached figure 1 shown. Finally weighed, after vacuum drying at 60°C for 24 hours, punched into electrode pieces with a diameter of 14mm and assembled into a symmetrical supercapacitor, in which both the positive and negative electrodes were prepared electrodes, the diaphragm was celgard2400, and the electrolyte was 1mol / L Tetraethylammonium tetrafluoroborate / propylene carbonate.

[0036] In the glove box, the electrode sheets were assembled into ...

Embodiment 2

[0040] Example 2: Dissolve 0.44g of PAN in 31g of N-methylpyrrolidone (NMP), stir until completely dissolved, add 0.55g of Super P, stir for 10min, add 4.5 g of activated carbon, stir for 4h to make a uniform slurry. Others are the same as in Example 1.

Embodiment 3

[0041] Example 3: Dissolve 0.44g of PAN in 31g of N-methylpyrrolidone (NMP), stir until completely dissolved, add 0.55g of Super P, stir for 10min, then add 4.5g of carbon nanotubes, stir for 4h to make a uniform slurry. Others are the same as in Specific Embodiment 1-2.

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Abstract

The invention relates to a flexible self-supporting porous electrode, a preparation method thereof and application thereof. A slurry is prepared by mixing one or two or more organic polymer resins, aconductive agent and a carbon material, and the slurry is applied on a glass plate and is transformed into the flexible self-supporting porous electrode by immersion phase transformation and freeze drying. The flexible self-supporting porous electrode has great advantages in electrode preparation process, economy, electrode composition structure, battery performance and the like and has a good application prospect, and the flexible self-supporting porous electrode can be used as an electrode of a super capacitor.

Description

technical field [0001] The invention relates to the technical field of supercapacitors, in particular to porous electrodes of supercapacitors. Background technique [0002] In recent years, the preparation of flexible electrodes for supercapacitors has attracted extensive attention from the academic community. Since this kind of electrode eliminates the current collector, the specific energy density of the capacitor has been greatly improved and the application field has become wider, and the flexibility, electronic and ionic conductivity of the self-supporting electrode determine the comprehensive performance of the flexible capacitor. . The existing flexible self-supporting electrodes are basically researched around low-dimensional (1D, 2D) materials that can form a good 3D network, and 0D materials with point contacts are rarely studied. Compared with 0D materials, there are relatively few types of 1D and 2D materials, and the preparation conditions are more stringent a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/86H01G11/32H01G11/26
CPCY02E60/13H01G11/86H01G11/26H01G11/32
Inventor 刘翠连张华民张洪章李先锋阎景旺曲超
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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