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Graphene/conducting polymer composite electrode material

A conductive polymer, composite electrode technology, applied in battery electrodes, hybrid capacitor electrodes, circuits, etc., can solve the problems of graphene performance advantages that cannot be exerted, easy to agglomerate, etc., to reduce the impact, the preparation process is simple, and it is easy to scale. Effect

Inactive Publication Date: 2014-05-28
CHINA FIRST AUTOMOBILE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Composite materials composed of graphene and electrode active materials can improve the performance of battery devices. However, due to the two-dimensional nanosheet structure of graphene, it is easy to agglomerate together, and a large part of the performance advantages of graphene cannot be brought into play.

Method used

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  • Graphene/conducting polymer composite electrode material

Examples

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Effect test

Embodiment 1

[0018] According to the mass ratio of 1:4, the specific surface area is 2200m 2 / g, graphene and polyaniline with a pore size of 3-8nm. Put the graphene into the ball mill tank of the ball mill, add a small amount of ethanol and stir for 2 minutes to make the graphene completely wet, add polyaniline and continue stirring for 1 hour, take out the mixed material, dry at 60°C to remove the ethanol, and obtain polyaniline / graphene The composite electrode material and the binder are made into pole pieces according to the mass ratio of 95:5, which can be used as supercapacitor electrodes.

Embodiment 2

[0020] Weigh the specific surface area as 2200m 2 / g, graphene with a pore size of 3-8nm, sonicate in methanol for 1h, add pyrrole monomer and sodium dodecylbenzenesulfonate, stir, control the reaction temperature below 0°C, and slowly add an aqueous solution of ferric chloride dropwise After reacting for 5 hours, the product was washed with deionized water and acetone, and dried to obtain a composite electrode material with a mass ratio of graphene and polypyrrole of 1:8, and a pole piece was made with polyvinylidene fluoride at a mass ratio of 90:10, which can be used as Li-ion battery electrodes.

Embodiment 3

[0022] A layer of graphene dispersion is coated on the indium tin oxide glass electrode by spin coating method, and the specific surface area of ​​graphene used is 2200m 2 / g, the pore size is 3-8nm; polythiophene is prepared by constant current electropolymerization, 0.1M imidazole tetrafluoroborate ionic liquid of ethylenedioxythiophene monomer is used as electrolyte, platinum electrode is auxiliary electrode, and silver wire is reference electrode , at room temperature, the current is 0.1mA / cm 2 Polymerization, controlling the polymerization time, so that the mass ratio of graphene and polythiophene is 1:1, and the obtained graphene / polythiophene composite material can be used as an active material for solar cell electrodes.

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Abstract

The invention relates to a graphene / conducting polymer composite electrode material. The material is characterized in that a conducting polymer is uniformly distributed between the surface and lamellas of graphene having a porous structure; the mass ratio of the graphene to the conducting polymer is (1:1)-(1:10); the specific surface area of the graphene is 1200-2300m<2> / g. The adopted graphene has the porous structure, so that the transmission speed and the diffusion space of ions are increased and the influence that the performance cannot be fully played due to the stacking of graphene sheets is reduced; the composite material is simple in preparation process and easy in scale production. The graphene / conducting polymer composite electrode material can serve as the electrode material of lithium ion batteries, solar batteries, super capacitors and the like.

Description

technical field [0001] The invention relates to a graphene / conductive polymer composite electrode material and belongs to the technical field of new energy materials. Background technique [0002] Graphene is a new type of two-dimensional carbon nanomaterial. It is an important research direction to prepare composite materials as fillers and polymers. Combining graphene and conductive polymers to prepare electrode materials has attracted many people's research interest. The Chinese patent with application publication number CN 101798462 A discloses graphene / conductive polymer composite film and its preparation method, and the Chinese patent with publication number CN 101527202A discloses graphene oxide / polyaniline supercapacitor composite electrode material and its preparation method and application , the Chinese patent application publication number CN 101985517 A discloses a synthesis method of a conductive polyaniline-graphene composite, and the Chinese patent application...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/24H01M4/587H01L31/0224
CPCY02E60/10Y02E60/13
Inventor 荣常如陈书礼韩金磊张克金林革魏晓川王丹马千里
Owner CHINA FIRST AUTOMOBILE
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