Conductive carbon paper and preparation method thereof

A conductive carbon and conductive technology, applied in the field of conductive carbon paper and its preparation, can solve the problems of poor catalyst layer bonding and rough surface of carbon paper, etc., and achieve high air distribution, high conductivity, and high gas diffusivity Effect

Active Publication Date: 2020-08-25
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
View PDF7 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in traditional electrode substrates, in order to improve the gas transport performance, the porosity o...

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Conductive carbon paper and preparation method thereof
  • Conductive carbon paper and preparation method thereof
  • Conductive carbon paper and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A conductive carbon paper, the conductive carbon paper is composed of 2-10 layers of single-layer carbon fiber paper with a porosity of 10-80%, wherein the porosity of the single-layer carbon fiber paper on the outermost side is denoted as A, and the other side is The porosity of the outermost single-layer carbon fiber paper is recorded as B, where the units of A and B are %, and the total thickness of the conductive carbon paper is recorded as L, where the unit of L is μm. The three must meet the following relationship: 0.2≤│A-B │ / L≤0.8.

[0033] The conductive carbon paper is an asymmetric porous structure carbon paper, the side of the conductive carbon paper with high porosity is used to contact the bipolar plate, and the side with low porosity is used to contact the catalyst layer and has a microporous layer. The carbon papers are arranged in order of porosity from small to large or from large to small.

[0034] A preparation method of conductive carbon paper, com...

Embodiment 2～10

[0041] A conductive carbon paper, the conductive carbon paper is composed of 2-10 layers of single-layer carbon fiber paper with a porosity of 10-80%, wherein the porosity of the single-layer carbon fiber paper on the outermost side is denoted as A, and the other side is The porosity of the outermost single-layer carbon fiber paper is recorded as B, where the units of A and B are %, and the total thickness of the conductive carbon paper is recorded as L, where the unit of L is μm. The three must meet the following relationship: 0.2≤│A-B │ / L≤0.8.

[0042] The conductive carbon paper is an asymmetric porous structure carbon paper, the side of the conductive carbon paper with high porosity is used to contact the bipolar plate, and the side with low porosity is used to contact the catalyst layer and has a microporous layer. The carbon papers are arranged in order of porosity from small to large or from large to small.

[0043] A preparation method of conductive carbon paper, cha...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention belongs to the technical field of conductive material preparation methods, and particularly relates to conductive carbon paper and a preparation method thereof. The conductive carbon paper is composed of 2-10 layers of single-layer carbon fiber paper with porosity of 10-80%, wherein the porosity of the single-layer carbon fiber paper on the outermost side is denoted as A, the porosity of the single-layer carbon fiber paper on the outermost side of the other side is denoted as B, the unit of A and B is%, the total thickness of the conductive carbon paper is denoted as L, the unitof L is [mu] m, and the three should meet the following relationship: 0.2 < = | A-B |/L < = 0.8. A mixture containing a dispersing agent, chopped carbon fibers and carbon nanofibers is put into waterand pulped to uniformly disperse the carbon fibers and the carbon nanofibers to form a suspension; the suspension is manufactured by adopting a conventional wet papermaking technology to form carbon fiber base paper and soaked in a binder, dried, and carbonized to obtain the conductive carbon paper.

Description

technical field [0001] The invention belongs to the technical field of preparation methods of conductive materials, and in particular relates to a conductive carbon paper and a preparation method thereof. Background technique [0002] The gas diffusion layer of a proton exchange membrane hydrogen fuel cell needs to have functions such as current collection, gas transmission, and gas distribution. Therefore, the carbon fiber paper layer material constituting the gas diffusion layer is required to have properties such as high electrical conductivity, high gas diffusibility, and high gas distribution property at the same time. [0003] As carbon paper for the gas diffusion layer of a proton exchange membrane fuel cell, Japanese Laid-Open Patent No. 6-20710 discloses that chopped carbon fibers are randomly dispersed to form carbon fiber paper, and then combined with carbon materials to form a porous structure. Carbon fiber paper material. However, it is difficult for the carbo...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): D21H13/50D21H15/02D21H21/08D21H21/14D21H25/06D21H17/35D21H19/38D21H19/56D21H17/26D21H17/14D21H17/37D21H17/36D21H17/56D21H17/11D21H17/53D21H17/06D21H17/07D21H17/48D21H17/24D21H17/61D21H17/51D21H17/34D21H17/47C04B35/83C04B35/532H01M8/0234H01M4/88D21H27/30B32B29/00
CPCB32B29/005C04B35/532C04B35/83C04B2235/5248C04B2235/526C04B2235/5264C04B2235/602C04B2235/656C04B2235/6567C04B2235/658C04B2235/94C04B2235/95D21H13/50D21H15/02D21H17/06D21H17/07D21H17/11D21H17/14D21H17/24D21H17/26D21H17/34D21H17/35D21H17/36D21H17/37D21H17/47D21H17/48D21H17/51D21H17/53D21H17/56D21H17/61D21H19/38D21H19/56D21H21/08D21H21/14D21H25/06D21H27/30H01M4/8807H01M8/0234Y02E60/50Y02P70/50
Inventor 吴刚平刘玉婷
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap