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Carbon paper for electrode diffusion layer of fuel cell and preparation method thereof

A fuel cell electrode and diffusion layer technology, which is applied to battery electrodes, synthetic cellulose/non-cellulose material pulp/paper, circuits, etc., can solve the problems that the uniformity affects the uniformity of the finished carbon paper, and the post-processing process is complicated. To achieve the effect of simplifying the papermaking process

Active Publication Date: 2013-05-22
浙江鹏辰造纸研究所有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the above preparation methods, the carbon fibers need to be bonded by impregnating resin to endow the carbonized carbon paper with better strength, so the post-treatment process of preparing carbon paper is more complicated, and the uniformity of resin impregnation may also affect the finished product. Uniformity of carbon paper

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Put 45 parts of polyacrylonitrile-based carbon fiber (fiber length 4mm, diameter 7μm) into a dispersion bucket with agitator, add water and anionic polyacrylamide dispersant, in which the concentration of carbon fiber is 0.5%, the viscosity of the water phase is 70 seconds, and fully stir , Decompose until the carbon fiber is completely dispersed into a single fiber.

[0026] Put 30 parts of polyacrylonitrile fiber (fiber length 5mm, diameter 18μm) into a dispersion bucket with agitator, add water and anionic polyacrylamide dispersant, wherein the concentration of polyacrylonitrile fiber is 1.5%, and the viscosity of the water phase is 60 seconds. Stir well until the polyacrylonitrile fibers are evenly dispersed in the water.

[0027] Put 25 parts of polyacrylonitrile pulp (fiber length 2mm) into a beater that has been stored with an appropriate amount of water. The concentration of the fiber in water is 2%. First, disperse for 10 minutes, then beat with a light knife f...

Embodiment 2

[0032] Put 25 parts of polyacrylonitrile-based carbon fiber (fiber length 4mm, diameter 7μm) and 25 parts of pitch-based carbon fiber (fiber length 6mm, diameter 15μm) into two dispersion barrels with agitators, add water and polyethylene oxide (PEO ) dispersant, so that the slurry concentration is 0.5% and 0.8% respectively, and the viscosity of the water phase is 65 seconds and 60 seconds respectively, fully stir and decompose until the carbon fiber is completely dispersed into a single fiber.

[0033] Put 23 parts of polyacrylonitrile fibers (fiber length 5mm, diameter 18μm) into a dispersion bucket with agitator, add water and polyethylene oxide (PEO) dispersant, wherein the concentration of polyacrylonitrile fibers is 2.0%, and the viscosity of the aqueous phase is 58 Seconds, fully stir until the polyacrylonitrile fibers are evenly dispersed in the water.

[0034] Put 27 parts of polyacrylonitrile pulp (fiber length 2mm) into a beater with an appropriate amount of water,...

Embodiment 3

[0037] Put 55 parts of pitch-based carbon fiber (fiber length 6mm, diameter 15μm) into a dispersion bucket with agitator, add water and anionic polyacrylamide dispersant to make the slurry concentration 0.80%, water phase viscosity 65 seconds, fully stir, Disperse until the carbon fiber is completely dispersed into a single fiber.

[0038] Put 15 parts of polyacrylonitrile fiber (fiber length 5mm, diameter 18μm) into a dispersion bucket with agitator, add water and anionic polyacrylamide dispersant, wherein the concentration of polyacrylonitrile fiber is 1.5%, and the viscosity of water phase is 68 seconds, Stir well until the polyacrylonitrile fibers are evenly dispersed in the water.

[0039] Put 30 parts of polyacrylonitrile pulp (fiber length 2mm) into a beater that has been stored with an appropriate amount of water. The concentration of fibers in water is 3.0%. First, disperse for 15 minutes, then beat with a light knife for 60 minutes, and wait until the fibers are comp...

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PUM

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Abstract

The invention provides carbon paper for an electrode diffusion layer of a fuel cell and a preparation method thereof, and belongs to the technical field of carbon paper and preparation methods thereof. The carbon paper is characterized by being prepared from the components of carbon fiber, polyacrylonitrile fiber and polyacrylonitrile pulp fiber and being prepared by the steps of: defibering, pulping, pulp mixing and the like; papermaking is performed by using a wet papermaking technology through an inclined-wire papermaking machine or side-flow type cylinder papermaking machine; and then hot pressing and high-temperature carbonizing treatment are performed to obtain the carbon paper. Through the method provided by the invention, the prepared carbon paper for an electrode diffusion layer of a fuel cell has good strength and uniformity, relatively high air permeability and excellent conductivity; and the production technology is simple.

Description

technical field [0001] The present invention relates to a kind of carbon paper and its preparation method, more specifically, the present invention relates to a kind of carbon paper for the electrode diffusion layer of proton exchange membrane fuel cell and its preparation method. Background technique [0002] A proton exchange membrane fuel cell (PEMFC) is a device that converts the chemical energy stored in fuel and oxidant into electrical energy efficiently and environmentally friendly by electrochemical reaction without combustion under isothermal conditions. It is a new type of green and clean energy with high power density, high energy conversion rate, low temperature start-up, no pollution, and light volume. [0003] Carbon paper is an important material for preparing the electrode diffusion layer of fuel cells. It has a uniform porous structure, good strength and excellent electrical conductivity. The role of gas channels and drainage channels. Carbon paper is usua...

Claims

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Application Information

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IPC IPC(8): D21H13/50H01M4/86
CPCY02E60/50
Inventor 王虹李荣年汤人望
Owner 浙江鹏辰造纸研究所有限公司
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