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Special high-performance carbon paper for gas diffusion layer of fuel cell and preparation method of carbon paper

A gas diffusion layer and fuel cell technology, used in special paper, electrical components, battery electrodes, etc., can solve the problems of inappropriate operation, difficult to control the range of pore size distribution, repeated energy consumption, etc., to avoid high temperature carbonization and graphitization, Easy to control product quality and avoid the effect of repeated energy consumption

Inactive Publication Date: 2014-02-05
ZHEJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005](1) The production process is complex, cumbersome and unsuitable for operation
[0006](2) The uniformity of resin impregnation will affect the uniformity of finished carbon paper
[0007](3) The range of pore size distribution of the product is not easy to control
[0008](4) The production process is a high-energy-consuming process, and some links are repetitive energy-consuming
Carbon paper is produced by this method, and the raw material used is carbon fiber. High-temperature carbonization is required when making carbon fiber, and high-temperature carbonization is also required when making carbon paper. This is secondary energy consumption.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036]A special high-performance carbon paper for the gas diffusion layer of a fuel cell. The carbon paper uses polypropylene cyanocarbon fiber, coniferous wood pulp fiber, polyethylene fiber, aramid fiber and carbon black as raw materials after deflaking, beating and pulping. The paper is made by wet papermaking process, and then it is made by coating with waterproof coating. The ratio of the raw materials is as follows in parts by weight: 65 parts of polypropylene cyanocarbon fiber, 15 parts of softwood pulp fiber, and 10 parts of polyethylene fiber , 5 parts of aramid fiber and 5 parts of carbon black, wherein the length of polypropylene cyanocarbon fiber is 1.0-3.0 mm, the resistivity is 0.001 ? .cm, the length of softwood pulp fiber is 1.5 mm, and the diameter is 40 um.

[0037] The preparation method of the above-mentioned special high-performance carbon paper for the fuel cell gas diffusion layer is as follows:

[0038] A. Prepare polypropylene cyano carbon fiber, which...

Embodiment 2

[0046] A special high-performance carbon paper for the gas diffusion layer of a fuel cell. The carbon paper uses polypropylene cyanocarbon fiber, pitch-based carbon fiber, coniferous wood pulp fiber, polyethylene fiber, aramid fiber and carbon black as raw materials and undergoes flaking, beating, and carbon black. After the slurry is prepared, the paper is made by a wet papermaking process, and then made by coating with a waterproof coating. The proportions of the raw materials are as follows in parts by weight: 50 parts of polypropylene cyano-carbon fiber, 20 parts of pitch-based carbon fiber, softwood 15 parts of pulp fiber, 5 parts of polyethylene fiber, 5 parts of aramid fiber and 5 parts of carbon black, wherein the length of chopped carbon fiber is 4.0mm, the resistivity is 0.02?.cm, and the length of softwood pulp fiber is 4.5mm, The diameter is 55um.

[0047] The preparation method of the above-mentioned special high-performance carbon paper for the fuel cell gas diff...

Embodiment 3

[0056] A special high-performance carbon paper for the gas diffusion layer of a fuel cell. The carbon paper is made of pitch-based carbon fiber, coniferous wood pulp fiber, Kodel 410 fiber and carbon black as raw materials, and is made by a wet papermaking process after dispersing, beating, and pulping , and then made through waterproof paint coating treatment, the proportioning of each raw material is as follows in parts by weight: 75 parts of pitch-based carbon fiber, 10 parts of softwood pulp fiber, 10 parts of Kodel 410 fiber and 5 parts of carbon black, wherein pitch The length of the base carbon fiber is 1.0-3.0 mm, the resistivity is 0.001 ? .cm, the average length of the softwood pulp fiber is 1.5 mm, and the diameter is 40 um.

[0057] The preparation method of the above-mentioned special high-performance carbon paper for the fuel cell gas diffusion layer is as follows:

[0058] A. Prepare pitch-based carbon fiber and undergo coupling modification;

[0059] B. Put 75...

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Abstract

The invention relates to carbon paper and a preparation method thereof and particularly relates to special high-performance carbon paper for a gas diffusion layer of a fuel cell and a preparation method of the carbon paper. By taking short carbon fibers, plant fibers, heat bonding fibers and carbon black as raw materials, the carbon paper is prepared by the following steps: defibering, pulping and proportioning; then carrying out papermaking by adopting a wet-method papermaking process; and carrying out waterproof pigment coating treatment. The ratios of all the raw materials are as follows in parts by weight: 65-75 parts of the short carbon fibers, 10-15 parts of the plant fibers, 10-15 parts of the heat bonding fibers and 0-10 parts of the carbon black. According to the special high-performance carbon paper for the gas diffusion layer of the fuel cell and the preparation method of the carbon paper, a production process combining wet-method formation, hot pressing and coating is adopted and has the characteristics of simple process flow, easiness for controlling product quality, environment-friendly production process and the like; the material ratio of each raw material can be accurately controlled in the production so as to be good for controlling the product quality.

Description

technical field [0001] The invention relates to a carbon paper and a preparation method thereof, more specifically, the invention relates to a special high-performance carbon paper for a gas diffusion layer of a fuel cell and a preparation method thereof. Background technique [0002] In the 21st century, energy has become an important infrastructure directly related to national security, social stability and national economic development. Fuel cell is a new type of energy conversion device. As a new technology of energy utilization, fuel cell has the advantages of high efficiency and cleanliness, and has become a development hotspot in the field of energy in the world today. Among them, the proton exchange membrane fuel cell is considered to be the preferred clean and efficient fuel cell due to its high power density, high energy conversion efficiency, low-temperature start-up, no pollution, light weight, insensitivity to pressure changes, and long battery life. power gene...

Claims

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Application Information

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IPC IPC(8): D21H27/00D21H13/50H01M4/86
CPCY02E60/50
Inventor 胡志军胡桂林冒晓东司莉莉
Owner ZHEJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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