A porous carbon fiber paper for fuel cell with proton exchange membrane and preparation method thereof

A technology of porous carbon fiber and proton exchange membrane, which is applied in synthetic cellulose/non-cellulose material pulp/paper, special paper, fiber raw material processing, etc., can solve the complex process, low air permeability and uneven distribution of carbon fiber paper pores The problem is to overcome the uneven distribution of pores, high air permeability and uniform distribution of pores.

Inactive Publication Date: 2006-12-27
浙江省普瑞科技有限公司
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  • Summary
  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

The process is complicated, and the uneven or excessive amount of resin will also lead to th

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0022] Example 1: Add 20 parts of selected polypropylene cyanocarbon fibers with a diameter of 6 μm and an average fiber length of 10 mm to a 0.2% carboxymethyl cellulose aqueous solution, and disperse them with a high-speed mixer. Take another 80 parts of polypropylene cyanide fiber with a diameter of 8μm and an average fiber length of 10mm, put it in water, stir and disperse, pour into the chopped carbon fiber slurry, add 40 parts of 5% concentration polyvinyl alcohol solution and mix well, then use wet papermaking process The paper was made and dried with hot air at 80°C, and heated by a hot press at 220°C and 0.6Mpa pressure for 1.5 minutes to obtain an intermediate product.

[0023] The above intermediate product is carbonized under argon protection and at a temperature of 1500°C for 2 hours to prepare porous carbon fiber paper. The thickness of the paper is 0.25mm and the density is 0.37g / cm 3 Area weight: 92.5g / m 2 , Air permeability 298L / m 2 ·S, the resistivity is 0.029Ω·c...

Example Embodiment

[0024] Example 2: Add 42 parts of selected pitch-based carbon fibers with a diameter of 7 μm and an average fiber length of 4 mm to a 0.5% methylcellulose aqueous solution, and disperse them with a high-speed mixer. Take another 58 parts of polyimide fiber with a diameter of 10μm and an average fiber length of 4mm, put it in water, stir and disperse, pour into the chopped carbon fiber slurry, add 50 parts of 5% concentration polyvinyl alcohol solution and mix well, then use wet papermaking Process papermaking and drying with hot air at 90°C, and hot-press it with a hot press at 250°C and a pressure of 1.0Mpa for 1.0 minute to obtain an intermediate product.

[0025] The above intermediate product was carbonized under argon protection and at a temperature of 2000°C for 1.3 hours to prepare porous carbon fiber paper. The thickness of the paper is 0.19mm and the density is 0.42g / cm 3 Area weight: 79.8g / m 2 , Air permeability 309L / m 2 ·S, the resistivity is 0.016Ω·cm.

Example Embodiment

[0026] Example 3: 39 parts of viscose-based carbon fibers with a diameter of 12 μm and an average fiber length of 6 mm were added to a 0.8% sodium hydroxyethyl cellulose solution and dispersed by a high-speed mixer. Take another 61 parts of pitch fiber with a diameter of 15μm and an average fiber length of 6mm, put it in water, stir and disperse, pour into the chopped carbon fiber slurry, add 15 parts of polyvinyl alcohol short fiber, mix well, use wet papermaking process to make paper and use Dry with hot air at 95°C, and heat-press it with a hot press at 260°C and a pressure of 1.0Mpa for 1.0 minute to obtain an intermediate product.

[0027] The above intermediate product is carbonized under argon protection and at a temperature of 2200°C for 1 hour to prepare porous carbon fiber paper. The thickness of the paper is 0.20mm and the density is 0.42g / cm 3 Area weight: 84.0g / m 2 , Air permeability 339L / m 2 ·S, the resistivity is 0.019Ω·cm.

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Abstract

The invention discloses an electrode material and preparing material, which consists of chopped carbon fiber and heat cohesion fiber at 20-70:80-30 weight rate. The invention reduces manufacturing cost, which makes porous carbon fiber with even distributing porthole, high permeating degree, good strength and low resistance rate.

Description

Technical field [0001] The invention relates to an electrode material and a preparation method thereof, in particular to a porous carbon fiber paper for a proton exchange membrane fuel cell and a preparation method thereof. Background technique [0002] Proton exchange membrane fuel cell is a device that synthesizes hydrogen and oxygen in the air into clean water and releases electricity. It is a clean energy with no noise, no pollution, long life, high specific power and high energy efficiency. The electrode of the proton exchange membrane fuel cell is composed of a gas diffusion layer and a catalyst layer. At present, most of the diffusion layer materials are porous carbon fiber paper or carbon cloth, which supports the catalyst layer, stabilizes the electrode structure and provides gas channels, electron channels and drainage channels for electrode reactions. [0003] In the past, porous carbon fiber paper was made by using chopped carbon fiber as a raw material, adding polyvi...

Claims

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Application Information

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IPC IPC(8): D21H13/50D21H27/00D21H23/04D21H25/02
Inventor 王虹李荣年汤人望施南飞
Owner 浙江省普瑞科技有限公司
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