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A kind of copolymer composite material and composite electrode material and preparation method thereof

A composite material and composite electrode technology, used in hybrid capacitor electrodes, battery electrodes, circuits, etc., can solve the problems of weak adhesion between the coating and the current collector interface, cumbersome molding process, and small capacitance of electrode materials. Defects, high mechanical properties, improved dispersibility

Active Publication Date: 2019-01-04
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, traditional electrode materials are mixed with powdered energy storage active components, conductive carbon black, adhesive polytetrafluoroethylene emulsion, etc., and then pressed into the metal mesh (collector) or coated on the surface of the metal sheet (collector) As a result, the molding process is cumbersome, the mechanical properties are poor, the product is bulky, and the product shape is poorly adaptable, which fails to meet the needs of new electronic products.
In recent years, although lightweight and flexible electrode materials can be easily prepared on the surface of new current collectors such as carbon fibers and their fabrics by electrodeposition and hydrothermal reaction, there are problems with low active component loading and the interface bonding between the coating and the current collector. Weak force and other problems cause the electrode material to have problems such as small capacitance and short service life

Method used

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  • A kind of copolymer composite material and composite electrode material and preparation method thereof
  • A kind of copolymer composite material and composite electrode material and preparation method thereof
  • A kind of copolymer composite material and composite electrode material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Embodiment 1 prepares pure ethylene-vinyl acetate copolymer

[0045] After 100 grams of ethylene-vinyl acetate copolymer (vinyl acetate content is 32%, the product model is MA10, produced by Singapore Polyolefin Company) is dissolved in 250 milliliters of benzene solvent, cast in the cellulose hydrogel mould, wait two The toluene solvent evaporates completely, and the ethylene-vinyl acetate copolymer of a specific shape is obtained.

[0046] In addition to using benzene solvent in this embodiment, it can also be replaced by xylene solvent or tetrahydrofuran solvent.

Embodiment 2

[0047] Embodiment 2 prepares 20% carbon nanotube / ethylene-vinyl acetate copolymer composite material

[0048] After dissolving 8 grams of ethylene-vinyl acetate copolymer in 250 ml of xylene solvent, the weight ratio of ethylene-vinyl acetate copolymer to xylene solvent should not be higher than 20:80, preferably 10:80 in this embodiment, Add 2 grams of carbon nanotubes (the model is NC7000, produced by Nanocyl S.A.) under the condition of ultrasonic stirring, disperse the carbon nanotubes with ethylene-vinyl acetate copolymer solution, mix well, and cast in the cellulose hydrogel mold , until the xylene solvent is completely volatilized, a 20% carbon nanotube / ethylene-vinyl acetate copolymer composite material with a specific shape is obtained, and the carbon nanotubes and ethylene-vinyl acetate copolymer in the composite material form a three-dimensional co-continuous phase structure.

Embodiment 3

[0049] Embodiment 3 prepares 40% carbon nanotube / ethylene-vinyl acetate copolymer composite material

[0050] After dissolving 6 grams of ethylene-vinyl acetate copolymer in 250 milliliters of benzene solvent, add 4 grams of carbon nanotubes under the condition of ultrasonic stirring, mix evenly, cast it in a cellulose hydrogel mold, and wait for the xylene solvent to volatilize completely , 40% carbon nanotube / ethylene-vinyl acetate copolymer composite material was obtained.

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Abstract

The invention provides a carbon nanotube / ethylene-vinyl acetate copolymer composite material. The carbon nanotube / ethylene-vinyl acetate copolymer composite material comprises carbon nanotubes and an ethylene-vinyl acetate copolymer. The carbon nanotube / ethylene-vinyl acetate copolymer composite material comprises, by mass, 20-60% of the carbon nanotubes and the balance the ethylene-vinyl acetate copolymer. The carbon nanotube / ethylene-vinyl acetate copolymer composite material can be used as a super capacitor and battery electrode material and has the advantages of compact structure, small internal stress, high mechanical properties, large electric capacity and long service life.

Description

technical field [0001] The invention relates to the technical field of functional polymer materials, in particular to a composite electrode material and a preparation method thereof. Background technique [0002] In recent years, lightweight and flexible energy storage devices such as Li-ion batteries, Na-ion batteries, and supercapacitors have attracted attention due to their use in the manufacture of wearable and portable electronics. In the composition of these energy storage devices, flexible electrode materials are the most important. It not only has to bear the heavy responsibility of charge energy storage and electron transport, but even needs to shoulder the role of structural components in some occasions. However, traditional electrode materials are mixed with powdered energy storage active components, conductive carbon black, adhesive polytetrafluoroethylene emulsion, etc., and then pressed into the metal mesh (collector) or coated on the surface of the metal shee...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/08C08L79/02C08K7/24H01G11/48H01M4/60H01M4/62
CPCY02E60/10Y02E60/13
Inventor 章自寿麦堪成张扬帆张春红
Owner SUN YAT SEN UNIV
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