Method for preparing bipolar plate made from carbon/carbon composite of fuel cell of proton exchange membrane

A proton exchange membrane, carbon composite material technology, applied in the field of fuel cells, can solve the problems of inability to obtain uniform thin plates, difficult to achieve miniaturization and thinning of batteries, etc. Effect

Inactive Publication Date: 2007-01-10
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The molding process cannot obtain a uniform thin plate with a large area, and it is difficult to realize the miniaturization and thinning of the battery

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Dissolve 5 grams of acrylamide, 0.25 grams of N, N'-methylenebisacrylamide, 0.4 grams of Tween and 0.1 grams of n-butanol in 94.25 grams of water, and stir to form a solution to ensure that acrylamide and N, N'- The methylenebisacrylamide is completely dissolved to obtain a monomer solution; then 55 grams of the solution is weighed, and 40 grams of mesophase carbon microspheres with an average particle diameter ranging from 5 to 30 microns and 5 grams of mesophase carbon microspheres with a length ranging from 10 to 100 microns are added. The carbon fiber is uniformly blended by ball milling to obtain a stable slurry; then add 0.2 g of ammonium persulfate and 0.1 g of N, N, N', N'-tetramethylethylenediamine to the slurry, After a little mixing by the mixer, immediately inject the slurry into a metal mold with a cavity thickness of 3 mm with a reverse gas flow channel, and then place the mold in a metal mold that has been preheated to 60 ° C. After 15 minutes, The polyme...

Embodiment 2

[0019] Dissolve 10 grams of acrylamide, 0.8 grams of N, N'-methylenebisacrylamide, 2.2 grams of Tween and 0.6 grams of tributyl phosphate in 86.4 grams of water, and stir to form a solution to ensure that acrylamide and N, N' -Methylenebisacrylamide is completely dissolved to obtain a monomer solution; then weigh 40 grams of the solution, add 50 grams of coke particles with a particle size ranging from 5 to 30 microns and 10 grams of carbon fibers with a length ranging from 10 to 100 microns , After blending uniformly by ball milling, a stable slurry is obtained; then add 0.1 gram of ammonium persulfate and 0.08 gram of N, N, N', N'-tetramethylethylenediamine to the slurry, and use an electric mixer for a while After adding and mixing, immediately inject the slurry into a metal mold with a cavity thickness of 3 mm with a reverse gas flow channel, and then place the mold in a metal mold that has been preheated to 70 ° C. After about 20 minutes, the slurry The polymer monomer in...

Embodiment 3

[0022] Dissolve 15 grams of acrylamide, 1.5 grams of N, N'-methylenebisacrylamide, 4 grams of Tween and 1 gram of n-butanol in 78.5 grams of water, and stir to form a solution to ensure that acrylamide and N, N'- Methylenebisacrylamide is completely dissolved to obtain a monomer solution; then weigh 25 grams of the solution, add 20 grams of coke particles with a particle size range of 5 to 30 microns, and 40 grams of intermediate particles with a particle size range of 5 to 30 microns. Phase carbon microspheres and 15 grams of carbon fibers with a length ranging from 10 to 100 microns are uniformly blended by ball milling to obtain a stable slurry; then add 0.05 grams of ammonium persulfate and 0.02 grams of N, N, N to the slurry ', N'-Tetramethylethylenediamine, after a little mixing with an electric mixer, immediately inject the slurry into a metal mold with a cavity thickness of 3 mm with a reverse gas flow channel, and then place the mold in the In a metal mold preheated t...

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Abstract

Based on materials of carbon granules in intermediate phase and carbon fiber as reinforcing material, bipolar plates are manufactured through gel injection mold at one time procedure. Manufacturing procedure includes following steps: adding carbon granules in intermediate phase and carbon fiber according to certain ratio into monomer solution and mixing the solution so as to obtain pulp; molding the pulp into metal mold having a reversed gas flow channel, heat preserving till completed reacting between monomer and crosslinking agent so as to obtain biscuit of bipolar plates; drying and sintering the biscuit; carrying out procedure of hole sealing by using thermosetting resin; charring solidified resin so as to obtain bipolar plates made from carbon / carbon composite. Features of the invention are high mechanical strength, good conductivity, no poison and pollution.

Description

technical field [0001] The invention relates to a method for preparing a proton exchange membrane fuel cell bipolar plate, in particular to a method for preparing a proton exchange membrane fuel cell carbon / carbon composite bipolar plate by a gel injection molding process. of fuel cell [0002] technology field. Background technique [0003] Proton exchange membrane fuel cells are mainly composed of membrane electrodes, bipolar plates and battery management systems. The bipolar plate is the key component of connecting individual PEMFCs in series to form a battery stack. At the same time, it is also responsible for introducing the reactant gas into the fuel cell, conducting current, and cooling and draining the battery. The performance of the bipolar plate directly determines the power density of the battery stack. size and length of service life. Harsh working conditions require bipolar plates to have excellent electrical and thermal conductivity, gas permeability resista...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/88
CPCY02E60/50
Inventor 李飞
Owner SHANGHAI JIAO TONG UNIV
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