Polymer electrolyte membrane fuel cells

Details Polymer electrolyte membrane fuel cells Polymer electrolyte membrane fuel cells

2005-09-20

2005-09-20

Ryan, Patrick Joseph (Department: 1745)

Chemistry: electrical current producing apparatus, product, and

With pressure equalizing means for liquid immersion operation

C429S006000, C429S047000, C429S047000, C429S047000, C029S623100, C029S623500

Reexamination Certificate

active

06946211

ABSTRACT:
A method for preparing polybenzimidazole or polybenzimidazole blend membranes and fabricating gas diffusion electrodes and membrane-electrode assemblies is provided for a high temperature polymer electrolyte membrane fuel cell. Blend polymer electrolyte membranes based on PBI and various thermoplastc polymers for high temperature polymer electrolyte fuel cells have also been developed. Miscible blends are used for solution casting of polymer membranes (solid electrolytes). High conductivity and enhanced mechanical strength were obtained for the blend polymer solid electrolytes. With the thermally resistant polymer, e.g., polybenzimidazole or a mixture of polybenzimidazole and other thermoplastics as binder, the carbon-supported noble metal catalyst is tape-cast onto a hydrophobic supporting substrate. When doped with an acid mixture, electrodes are assembled with an acid doped solid electrolyte membrane by hot-press. The fuel cell can operate at temperatures up to at least 200° C. with hydrogen-rich fuel containing high ratios of carbon monoxide such as 3 vol % carbon monoxide or more, compared to the carbon monoxide tolerance of 10-20 ppm level for Nafion®-based polymer electrolyte fuel cells.

REFERENCES:
patent: 4814399 (1989-03-01), Sansone et al.
patent: 5091087 (1992-02-01), Calundann et al.
patent: 5525436 (1996-06-01), Savinell et al.
patent: 5599639 (1997-02-01), Sansone et al.
patent: 5688613 (1997-11-01), Li et al.
patent: 5716727 (1998-02-01), Savinell et al.
patent: 197 21 952 (1998-12-01), None
patent: 19721952 (1998-12-01), None
patent: 0557291 (1994-01-01), None
patent: 0 577 291 (1994-01-01), None
patent: 0 687 023 (1995-12-01), None
patent: 0 869 568 (1998-10-01), None
patent: 0869568 (1998-10-01), None
patent: 99/04445 (1999-01-01), None
patent: WO 99/04445 (1999-01-01), None
Performance Study of a Fuel Cell Pt-on-C Anode in Presence of CO and CO2, and Calculation of Adsorption Parameters for CO Poisoning, by H. P. Dhar et al., Energy Research Corporation, vol. 133, No. 8, Aug. 1986, pp. 1574-1582.
Nature of CO Adsorption during H2Oxidation in Relation to Modeling for CO Poisoning of a Fuel Cell Anode, by H.P. Dhar et al., Journal of Electrochemical Society, vol. 134, No. 12, Dec. 1987, pp. 3021-3026.
Acid-Doped Polybenzimidazoles: A New Polymer Electrolyte, by J.S. Wainwright, et al, Journal of Electrochemical Society, vol. 142, No. 7, Jul. 1995, pp. L121-L123.
Real-Time Mass Spectrometric Study of the Methanol Crossover in a Direct Methanol Fuel Cell, by J.-T. Wang et al., Journal of Electrochemical Society, vol. 143, No. 4, Apr. 1996, pp. 1233-1239.
Thermal Stability of Proton Conducting Acid Doped Polybenzimidazole in Simulated Fuel Cell Environments, by S.R. Samms et al., Journal of Electrochemical Society, vol. 143, No. 4, Apr. 1996, pp. 1225-1232.
Electro-osmotic Drag Coefficient of Water and Methanol in Polymer Electrolytes at Elevated Temperatures, by D. Weng et al., Journal of Electrochemical Society, vol. 143, No. 4, Apr. 1996, pp. 1260-1263.
Kinetics of O2Reduction on a Pt Electrode Covered with a Thin Film of Solid Polymer Electrolyte, by S.K. Zecevic et al., Journal of Electrochemical Society, vol. 144, No. 9, Sep. 1997, pp. 2973-2982.
Formic Acid Oxidation in a Polymer Electrolyte Fuel Cell, A Real-Time Mass-Spectrometry Study, by M. Weber et al., Journal of Electrochemical Society, vol. 143, No. 7, Apr. 1996, pp. L158-L160.
Acid-Doped Polybenzimidazole as the Membrane of Electrochemical Hydrogen Sensors, by R. Bouchet et al., Journal of Electrochemical Society, vol. 144, No. 5, May 1997, pp. L95-L97.

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