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Title: Electrode assembly for use in a solid polymer electrolyte fuel cell

Abstract

A gas reaction fuel cell may be provided with a solid polymer electrolyte membrane. Porous gas diffusion electrodes are formed of carbon particles supporting a catalyst which is effective to enhance the gas reactions. The carbon particles define interstitial spaces exposing the catalyst on a large surface area of the carbon particles. A proton conducting material, such as a perfluorocarbon copolymer or ruthenium dioxide contacts the surface areas of the carbon particles adjacent the interstitial spaces. The proton conducting material enables protons produced by the gas reactions adjacent the supported catalyst to have a conductive path with the electrolyte membrane. The carbon particles provide a conductive path for electrons. A suitable electrode may be formed by dispersing a solution containing a proton conducting material over the surface of the electrode in a manner effective to coat carbon surfaces adjacent the interstitial spaces without impeding gas flow into the interstitial spaces.

Inventors:
 [1]
  1. (Los Alamos, NM)
Publication Date:
Research Org.:
Los Alamos National Laboratory (LANL), Los Alamos, NM
OSTI Identifier:
867152
Patent Number(s):
US 4876115
Assignee:
United States Department of Energy (Washington, DC) LANL
DOE Contract Number:
W-7405-ENG-36
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
electrode; assembly; solid; polymer; electrolyte; fuel; cell; gas; reaction; provided; membrane; porous; diffusion; electrodes; formed; carbon; particles; supporting; catalyst; effective; enhance; reactions; define; interstitial; spaces; exposing; surface; proton; conducting; material; perfluorocarbon; copolymer; ruthenium; dioxide; contacts; adjacent; enables; protons; produced; supported; conductive; path; provide; electrons; suitable; dispersing; solution; containing; manner; coat; surfaces; impeding; flow; fuel cell; proton conducting; gas diffusion; electrolyte membrane; conducting material; electrolyte fuel; electrode assembly; solution containing; gas flow; polymer electrolyte; solid polymer; carbon particles; supported catalyst; conductive path; gas reaction; reaction fuel; surfaces adjacent; carbon surface; particles provide; diffusion electrodes; porous gas; material enables; /427/429/

Citation Formats

Raistrick, Ian D. Electrode assembly for use in a solid polymer electrolyte fuel cell. United States: N. p., 1989. Web.
Raistrick, Ian D. Electrode assembly for use in a solid polymer electrolyte fuel cell. United States.
Raistrick, Ian D. 1989. "Electrode assembly for use in a solid polymer electrolyte fuel cell". United States. doi:. https://www.osti.gov/servlets/purl/867152.
@article{osti_867152,
title = {Electrode assembly for use in a solid polymer electrolyte fuel cell},
author = {Raistrick, Ian D.},
abstractNote = {A gas reaction fuel cell may be provided with a solid polymer electrolyte membrane. Porous gas diffusion electrodes are formed of carbon particles supporting a catalyst which is effective to enhance the gas reactions. The carbon particles define interstitial spaces exposing the catalyst on a large surface area of the carbon particles. A proton conducting material, such as a perfluorocarbon copolymer or ruthenium dioxide contacts the surface areas of the carbon particles adjacent the interstitial spaces. The proton conducting material enables protons produced by the gas reactions adjacent the supported catalyst to have a conductive path with the electrolyte membrane. The carbon particles provide a conductive path for electrons. A suitable electrode may be formed by dispersing a solution containing a proton conducting material over the surface of the electrode in a manner effective to coat carbon surfaces adjacent the interstitial spaces without impeding gas flow into the interstitial spaces.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 1989,
month = 1
}

Patent:

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  • This paper describes a gas reaction fuel cell provided with a solid polymer electrolyte membrane. Porous gas diffusion electrodes are formed of carbon particles supporting a catalyst which is effective to enhance the gas reactions. The carbon particles define interstitial spaces exposing the catalyst on a large surface area of the carbon particles. A proton conducting material, such as perfluorociarbon copolymer or ruthenium dioxide contacts the surface areas of the carbon particles adjacent the interstitial spaces. The proton conducting material enables protons produced by the gas reactions adjacent the supported catalyst to have a conductive path with the electrolyte membrane.more » The carbon particles provide a conductive path for electrons. A suitable electrode may be formed by dispersing a solution containing a proton conducting material over the surface of the electrode in a manner effective to coat carbon surfaces adjacent the interstitial spaces without impeding gas flow into the interstitial spaces.« less
  • A gas reaction fuel cell may be provided with a solid polymer electrolyte membrane. Porous gas diffusion electrodes are formed of carbon particles supporting a catalyst which is effective to enhance the gas reactions. The carbon particles define interstitial spaces exposing the catalyst on a large surface area of the carbon particles. A proton-conducting material, such as a perfluorocarbon copolymer or ruthenium dioxide, contacts the surface areas of the carbon particles adjacent the interstitial spaces. The proton-conducting material enables protons produced by the gas reactions adjacent the supported catalyst to have a conductive path with the electrolyte membrane. The carbonmore » particles provide a conductive path for electrons. A suitable electrode may be formed by dispersing a solution containing a proton-conducting material over the surface of the electrode in a manner effective to coat carbon surfaces adjacent the interstitial spaces without impeding gas flow into the interstitial spaces.« less
  • The invention concerns a process for manufacturing electrodes for fuel cells operating at elevated temperatures, said process consisting in depositing by cathodic sputtering on a solid electrolyte substrate active mixtures of oxides and metals. The control of the relative rates of deposition of the various constituents of these active compositions is achieved by regulating individually independent magnetic fields acting on each of the components subjected to sputtering. A very high degree of homogeneity within the layers and of reproducibility of the compositions of the mixtures is achieved in this manner.
  • This patent describes solid polymer furl cell stack power assembly comprising: (a) fuel cells stacked on atop another, each of the fuel cells comprising: (i) a solid polymer electrolyte membrane; (ii) means forming an anode on one face of the electrolyte membranes, and means forming a cathode of an opposite face of the electrolyte membrane; (iii) a porous anode flow field plate disposed adjacent to the anode. The anode flow field plate having a contoured surface facing the anode with grooves forming a hydrogen reactant flow field, and intervening projections disposed in contact with the anode; (iv) a porous cathodemore » flow field plate disposed adjacent to the cathode. The cathode flow field plate having a contoured surface facing the cathode with groves forming an oxygen reactant flow field, and a plurality of intervening projections disposed in contact with the cathode; (b) with the exception of an initial cell in the stack, each of the cells in the stack having its anode flow field plate disposed back-to-back with the cathode flow field plate of an adjacent cell; (c) porous hydrophilic separator plates interposed between each of the back-to-back anode and cathode flow field plates; (d) means for admitting hydrogen into the hydrogen reactant flow fields.« less