Preparation method of graphene carbon fiber conductive paper for fuel cell electrodes

A fuel cell electrode, graphene carbon technology, applied in pulp beating/refining method, synthetic cellulose/non-cellulose material pulp/paper, special paper, etc., can solve problems such as being in the laboratory stage, and achieve enhanced electrical conductivity high porosity, strong far-infrared radiation, and the effect of increasing porosity

Active Publication Date: 2017-07-07
北京绿能嘉业新能源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the production of graphene carbon conductive paper is less, almost none, and some are only in the laboratory stage

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] In this embodiment, the preparation method of the fuel cell electrode porous diffusion layer material graphene carbon fiber conductive paper is as follows:

[0038] 1. Surface treatment of graphene powder and selection of graphene materials

[0039] 1. The selection of graphene powder

[0040] Graphene powder is used for surface active treatment. There are many manufacturers in my country that produce graphene. For example, there are graphene manufacturers in Jiangsu, Qingdao, Sichuan, Northeast, Anhui and other places. Graphene oxide is the best choice, because graphene oxide has oxygen-containing functional groups, is easy to dissolve in water or other solvents, and is easy to disperse, and can be better composited with plant fibers and chopped carbon fibers.

[0041] Among them, the graphene powder is a few-layer graphene material with 3 to 6 layers, the thickness of the graphene powder is 10 nm or less, and the width in the horizontal direction is 10 to 15 nm.

[0042] 2. Su...

Embodiment 2

[0065] In this embodiment, the preparation method of the fuel cell electrode porous diffusion layer material graphene carbon fiber conductive paper is as follows:

[0066] 1. Surface treatment of graphene powder and selection of graphene materials

[0067] 1. Material selection of graphene powder

[0068] Graphene powder is used for surface active treatment. There are many manufacturers of graphene in my country. For example, there are graphene manufacturers in Jiangsu, Qingdao, Sichuan, Northeast, Anhui and other places. Graphene oxide is the best choice, because graphene oxide has oxygen-containing functional groups, is easy to dissolve in water or other solvents, and is easy to disperse, and can be better composited with plant fibers and chopped carbon fibers.

[0069] Among them, the graphene powder is 3-6 layers of few-layer graphene, the thickness of the graphene powder is 10 nm or less, and the horizontal width is 10-15 nm.

[0070] 2. Surface treatment of graphene

[0071] Since...

Embodiment 3

[0093] In this embodiment, the preparation method of the fuel cell electrode porous diffusion layer material graphene carbon fiber conductive paper is as follows:

[0094] 1. Surface treatment of graphene powder and selection of graphene materials

[0095] 1. The selection of graphene powder

[0096] Graphene powder is used for surface active treatment. There are many manufacturers in my country that produce graphene. For example, there are graphene manufacturers in Jiangsu, Qingdao, Sichuan, Northeast, Anhui and other places. Graphene oxide is the best choice, because graphene oxide has oxygen-containing functional groups, is easy to dissolve in water or other solvents, and is easy to disperse, and can be better composited with plant fibers and chopped carbon fibers.

[0097] Among them, the graphene powder is 3-6 layers of few-layer graphene, the thickness of the graphene powder is 10 nm or less, and the horizontal width is 10-15 nm.

[0098] 2. Surface treatment of graphene

[0099] ...

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Abstract

The invention relates to the field of porous diffusion forming materials for fuel cell electrodes, specifically a base material for manufacturing a porous diffusion layer of a fuel cell electrode, as well as a preparation method and a production method of graphene carbon fiber conductive paper. The method adopts graphene powder, short chopped carbon fibers and plant fiber raw wood pulp, wherein graphene powder mixed liquid, short chopped carbon fiber mixed liquid and plant fiber mixed liquid are prepared into pulp, the pulp diluted by mixing with water is put onto a screen box for papermaking, the made paper is conveyed via a blanket, dried in a drying cylinder and rolled by a paper rolling device, and the required graphene carbon fiber conductive paper is thus obtained. The graphene carbon fiber conductive paper is 80-100 grams per square meter, the porosity is 20-40%, and the conductive sheet resistance is 3-10 ohms per square centimeter. The graphene carbon fiber conductive paper can be produced in batch on a common papermaking machine, and meets the requirement for manufacturing porous diffusion layer electrodes of fuel cells.

Description

Technical field [0001] The invention relates to the field of porous diffusion materials for fuel cell electrodes, in particular to a basic material for manufacturing a porous diffusion layer of fuel cell electrodes, and a preparation method and production method of graphene carbon fiber conductive paper. Background technique [0002] The fuel cell gas diffusion layer material plays the role of supporting the catalyst layer in the fuel cell, stabilizing the electrode structure, and also providing fuel gas channels, electronic channels and drainage channels for the fuel cell reaction. Different diffusion layer materials have different influences on the structure, preparation method and performance of fuel cell electrodes, and they vary greatly. Commonly used gas diffusion layer materials to prepare electrodes are: carbon fiber paper, carbon cloth and carbon black paper, etc. Although they have a uniform porous thin layer structure, they have good chemical stability and heat resista...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H27/00D21H15/12D21H13/50D21H17/00D21H21/14D21H21/16D21H21/10D21H21/08D21D1/30
CPCD21D1/30D21H13/50D21H15/12D21H17/00D21H21/08D21H21/10D21H21/14D21H21/16D21H27/00
Inventor 石伟
Owner 北京绿能嘉业新能源有限公司
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