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Method for producing separator material for solid polymer fuel cell

一种燃料电池、隔板材料的技术，应用在固体电解质燃料电池、燃料电池的零部件、燃料电池等方向，能够解决机械性差、气密性不足、石墨材料可加工性和密封性低等问题

Inactive Publication Date: 2011-11-16
TOKAI CARBON CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, graphite materials have low workability and sealing properties, and insufficient airtightness
Glassy carbon material has a dense texture and excellent airtightness, but its mechanical properties are poor due to its high hardness and brittleness

Method used

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  • Method for producing separator material for solid polymer fuel cell
  • Method for producing separator material for solid polymer fuel cell
  • Method for producing separator material for solid polymer fuel cell

Examples

Experimental program
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Embodiment 1～4 and comparative example 1～4

[0064] 25 parts by weight of epoxy resin (base resin: o-cresol novolac resin, curing agent: phenol novolak resin) (resin binder) are dissolved in 80 to 120 parts by weight of methyl ethyl ketone (MEK) (organic solvent) . To the resulting mixture were added 1 part by weight of an oil-in dispersant (anionic surfactant; polycarboxylate, "Homogenol L-18" manufactured by Kao Corporation) and 1 part by weight of an anti-sagging agent ("Talen" manufactured by Kyoeisha Chemical Co., Ltd.), thereby preparing a resin solution.

[0065]After adding 100 parts by weight of natural flake graphite (average particle diameter: 55 μm (55%), 10 μm (5%), 3 μm (40%)) to the resin solution, the resulting mixture was sufficiently stirred using a general-purpose stirrer. The air was removed by centrifugation to obtain slurries with different viscosities.

[0066] Nonwoven fabrics (thickness: 90 μm) having different through-hole opening area ratios (R) spun from olefin yarns by a spunbonding method ...

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Abstract

The present invention discloses a method for efficiently producing a separator material for solid polymer fuel cells, which enables to obtain a uniformly thin separator material with good quality characteristics for miniaturizing fuel cells. This method for producing a separator material for solid polymer fuel cells is characterized by sequentially performing the following steps 1-3. Step 1: The slurry having a viscosity of 100-1500 mPa s is prepared by dispersing 100 parts by weight of a carbonaceous powder in a resin solution which is obtained by dissolving 10-35 parts by weight of a resin binder and 0.1-10 parts by weight of a dispersing agent in an organic solvent. Step 2: A green sheet is prepared by immersing an organic material sheet having an opening area ratio (R) of through holes of 25-85% in the slurry for applying the slurry over the both sides of the organic material sheet, and then drying the resulting sheet for fixing the slurry thereon. Step 3: The green sheet is cut into a predetermined shape, and one cut sheet or a laminate of two or more cut sheets are subjected to hot pressing.

Description

technical field [0001] The invention relates to a method for manufacturing a separator material for a polymer electrolyte fuel cell. Background technique [0002] Fuel cells directly convert the chemical energy of fuel into electrical energy with high conversion efficiency. For example, a polymer electrolyte fuel cell can output high power at a relatively low temperature, and therefore, a polymer electrolyte fuel cell is expected to be a small portable power source such as a car power source. [0003] A polymer electrolyte fuel cell includes a stack formed by stacking single cells, and two current collectors arranged outside the stack, and each single cell includes an electrolyte membrane, a catalytic electrode, a separator, etc., wherein the electrolyte membrane It is composed of a polymer ion exchange membrane (such as a fluorine resin ion exchange membrane with sulfonic acid groups, etc.); the catalytic electrode is loaded with a catalyst such as platinum, and is arrange...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/02H01M8/10
CPCY02E60/50H01M8/0226H01M8/0221H01M8/0213H01M2008/1095Y02P70/50H01M8/02H01M8/10
Inventor 平野信行
Owner TOKAI CARBON CO LTD
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