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Title: Fuel cell with metal screen flow-field

Abstract

A polymer electrolyte membrane (PEM) fuel cell is provided with electrodes supplied with a reactant on each side of a catalyzed membrane assembly (CMA). The fuel cell includes a metal mesh defining a rectangular flow-field pattern having an inlet at a first corner and an outlet at a second corner located on a diagonal from the first corner, wherein all flow paths from the inlet to the outlet through the square flow field pattern are equivalent to uniformly distribute the reactant over the CMA. In a preferred form of metal mesh, a square weave screen forms the flow-field pattern. In a particular characterization of the present invention, a bipolar plate electrically connects adjacent fuel cells, where the bipolar plate includes a thin metal foil having an anode side and a cathode side; a first metal mesh on the anode side of the thin metal foil; and a second metal mesh on the cathode side of the thin metal foil. In another characterization of the present invention, a cooling plate assembly cools adjacent fuel cells, where the cooling plate assembly includes an anode electrode and a cathode electrode formed of thin conducting foils; and a metal mesh flow field there betweenmore » for distributing cooling water flow over the electrodes to remove heat generated by the fuel cells. 11 figs.« less

Inventors:
;
Issue Date:
Research Org.:
University of California
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
672661
Patent Number(s):
5,798,187
Application Number:
PAN: 8-873,049
Assignee:
Univ. of California, Los Alamos, NM (United States) PTO; SCA: 300501; PA: EDB-98:118878; SN: 98002026875
DOE Contract Number:  
W-7405-ENG-36
Resource Type:
Patent
Resource Relation:
Other Information: PBD: 25 Aug 1998
Country of Publication:
United States
Language:
English
Subject:
30 DIRECT ENERGY CONVERSION; SOLID ELECTROLYTE FUEL CELLS; MEMBRANES; DESIGN; FLOW REGULATORS; BATTERY SEPARATORS; COOLING SYSTEMS; TEMPERATURE CONTROL

Citation Formats

Wilson, M.S., and Zawodzinski, C. Fuel cell with metal screen flow-field. United States: N. p., 1998. Web.
Wilson, M.S., & Zawodzinski, C. Fuel cell with metal screen flow-field. United States.
Wilson, M.S., and Zawodzinski, C. Tue . "Fuel cell with metal screen flow-field". United States.
@article{osti_672661,
title = {Fuel cell with metal screen flow-field},
author = {Wilson, M.S. and Zawodzinski, C.},
abstractNote = {A polymer electrolyte membrane (PEM) fuel cell is provided with electrodes supplied with a reactant on each side of a catalyzed membrane assembly (CMA). The fuel cell includes a metal mesh defining a rectangular flow-field pattern having an inlet at a first corner and an outlet at a second corner located on a diagonal from the first corner, wherein all flow paths from the inlet to the outlet through the square flow field pattern are equivalent to uniformly distribute the reactant over the CMA. In a preferred form of metal mesh, a square weave screen forms the flow-field pattern. In a particular characterization of the present invention, a bipolar plate electrically connects adjacent fuel cells, where the bipolar plate includes a thin metal foil having an anode side and a cathode side; a first metal mesh on the anode side of the thin metal foil; and a second metal mesh on the cathode side of the thin metal foil. In another characterization of the present invention, a cooling plate assembly cools adjacent fuel cells, where the cooling plate assembly includes an anode electrode and a cathode electrode formed of thin conducting foils; and a metal mesh flow field there between for distributing cooling water flow over the electrodes to remove heat generated by the fuel cells. 11 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1998},
month = {8}
}