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Membrane electrode assembly for fuel cell
 
   
Document Number
US Patent 7459230
Issued Date
December 2, 2008
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Abstract
A membrane electrode assembly for a fuel cell includes an electrolyte membrane having ionic conductivity and a pair of gas diffusion electrodes having gas diffusivity and electric conductivity. Each of the pair of gas diffusion electrodes is bonded to one side or the other of the electrolyte membrane in a thickness direction. A bonding force for bonding at least one part of an outer circumferential area of the gas diffusion electrodes to the electrolyte membrane is set to at an inferior level to that of the bonding force for bonding a central area of the gas diffusion electrodes to the electrolyte membrane, so that an area of the electrolyte membrane facing the at least one part of the outer circumferential area of the gas diffusion electrodes can be protected from damage.
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Number of Claims:
7
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Published
December 2, 2008
Application Number
11/038,251
Filed
January 21, 2005
US Classification
429/36   29/623.2 429/30 429/44
Int'l Classification
H01M   2/08   (20060101)   H01M   4/94   (20060101)   H01M   8/10   (20060101)  
Examiner
Assistant Examiner
Priority Data
Jan 22, 2004 [JP] 2004-014844 Dec 03, 2004 [JP] 2004-351253
USPTO Field of Search
429/36   429/44   429/30  
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