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High-per formance carbon material preparing method by water-base curtain coating technology

A water-based casting, carbon material technology, applied in fuel cells, electrical components, electrochemical generators and other directions, can solve the problems of complex production process, unstable performance, high cost of bipolar plates, etc. The effect of low cost and shortened production cycle

Inactive Publication Date: 2004-02-04
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the deficiencies in the prior art, to provide a method for preparing high-performance carbon materials by water-based casting process, by using mesophase carbon particles (Mesophase Carbon Powder) as raw materials, with short carbon fibers as reinforcing materials, Proton exchange membrane fuel cell bipolar plates are prepared by Aqueous Tape-Casting technology, which solves the problems of high cost, complex manufacturing process and unstable performance of current fuel cell bipolar plates

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment one: 80 grams of mixed solvents of mesophase carbon microspheres and water and alcohol with a weight of 100 grams, and 2 grams of Tween ball milling mixed for 2 hours, then added 4 grams of polyvinyl alcohol, 4 grams of polyethylene glycol and 1 gram of tributyl phosphate and continued ball milling for 2 hours to obtain a stable and uniform casting slurry. The slurry was left to stand for 30 minutes under the condition that the vacuum degree was lower than 200 mbar, then cast on a tape casting machine, and dried at room temperature to obtain a tape casting green body with a thickness of about 1 mm. Put 4 tape-cast green bodies with a size of 120×90 mm into a mold, and press at a pressure of 40 MPa and a temperature of 85° C. to obtain a molded green body with a gas flow channel. The molded green body is put into a sintering furnace and sintered at 1400°C. From room temperature to 550°C, the heating rate is 2°C / min and kept at 550°C for 30 minutes, then the h...

Embodiment 2

[0019] Embodiment 2: Mesophase carbon microspheres with a weight of 90 grams, 10 grams of carbon fiber with a length of 400 microns, 80 grams of a mixed solvent of water and alcohol, and 2 grams of Tween were mixed for 2 hours, and then added 4 grams of poly Vinyl alcohol, 4 grams of polyethylene glycol and 1 gram of tributyl phosphate were ball milled for 2 hours to obtain a stable and uniform casting slurry. The slurry was left to stand for 30 minutes under the condition that the vacuum degree was lower than 200 mbar, then cast on a tape casting machine, and dried at room temperature to obtain a tape casting green body with a thickness of about 1 mm. Put 4 tape-cast green bodies with a size of 120×90 mm into a mold, and press at a pressure of 40 MPa and a temperature of 85° C. to obtain a molded green body with a gas flow channel. The molded green body is put into a sintering furnace and sintered at 1400°C. From room temperature to 550°C, the heating rate is 0.5°C / min and t...

Embodiment 3

[0020]Embodiment three: the needle coke powder that is 70 grams by weight, the length of 30 grams is 80 grams of the mixed solvent of carbon fiber and water and alcohol of 2 millimeters, and 2 grams of Tween ball mills are mixed 2 hours, then add 4 grams of formazan Base cellulose, 4 grams of polyethylene glycol and 1 gram of tributyl phosphate and continue ball milling for 2 hours to obtain a stable and uniform casting slurry. The slurry was left to stand for 30 minutes under the condition that the vacuum degree was lower than 200 mbar, then cast on a tape casting machine, and dried at room temperature to obtain a tape casting green body with a thickness of about 1 mm. Put 4 tape-cast green bodies with a size of 120×90 mm into a mold, and press at a pressure of 40 MPa and a temperature of 85° C. to obtain a molded green body with a gas flow channel. The molded green body is put into a sintering furnace and sintered at 1400°C. From room temperature to 550°C, the heating rate ...

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Abstract

A method of water-base casting technological preparation of the carbon material with advanced property, it belongs to the field of fuel cell, adopt intermediate phase carbon powder as raw materials, take short carbon fiber or grahpite as the enhanced modified material, the solution of casting slurry adopts the mixture of the water and alcohol, through the water-base cast techniques prepare the carbon / carbon composite green compacts, press the multiplayer casting green compacts to gain the laminating green compacts which have air interval channel, then through the high temperature sintering technique and the resin impregnation sealing of hole, finally get the bipolar plate of fuel cell of proton exchange membrane. This invention adopts firstly the casting forming technique to prepare the carbon / carbon composite bipolar plate.

Description

technical field [0001] The invention relates to a method for preparing carbon materials, in particular to a method for preparing a proton exchange membrane fuel cell carbon / carbon composite bipolar plate by using a water-based casting process, and belongs to the field of fuel cells. Background technique [0002] Proton exchange membrane fuel cell (PEMFC) is mainly composed of three parts, namely membrane electrode (MEA), bipolar plate and battery management system. The bipolar plate is not only a key component for connecting individual PEMFCs in series to assemble a battery stack, but also responsible for introducing the fuel reactant gas into the fuel cell and conducting current, and also responsible for the heat dissipation and drainage functions of the entire battery. Therefore, the quality of the bipolar plate will directly determine the output power and service life of the fuel cell stack. After literature search, it was found that Theodore M. Besmann et al. published ...

Claims

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Application Information

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IPC IPC(8): C01B31/02H01M4/88H01M4/96H01M8/00
CPCY02E60/50
Inventor 胡晓斌胡克鳌赵斌元陈刚
Owner SHANGHAI JIAO TONG UNIV
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