Wet proofed conductive current collector for the electrochemical cells
In an electrochemical cell in which one of the electrodes is exposed to water, the combination comprising, (A) a housing, (B) a fluid impervious ion transporting membrane separating said housing into anode an cathode chamber, (C) a catalytic anode electrode bonded to the side of said membrane facing the anode chamber and adapter to the exposed to a fuel gas, (D) a catalytic cathode electrode bonded to the other side of said membrane facing the cathode chamber adapted to be exposed to an oxidant gas and to water, (E) an electrically conductive, porous, carbon paper sheet in contact with the cathode electrode bonded to said membrane over a substantial portion thereof said carbon paper including a hydrophobic polymer dispersed therein for wet proofing said carbon paper sheet to prevent formation of a water film adjacent to said bonded electrode and interruption of the conductive path between said bonded electrode and said conductive carbon paper sheet, (F) a conductive screen in contact with the wet proofed carbon paper on the side remote from the cathode electrode bonded to the membrane, and (G) conductive plate means in contact with said screen and an output terminal to permit axial current flow from the surface of the bonded cathode electrode to said terminal.
- Assignee:
- General Electric Co
- Patent Number(s):
- US 4215183
- OSTI ID:
- 7064636
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
300501* -- Fuel Cells-- Design & Development
300503 -- Fuel Cells-- Materials
Components
& Auxiliaries
ANODES
CARBON
CATHODES
CHEMICAL REACTIONS
COMPARTMENTS
CURRENTS
DESIGN
DIRECT ENERGY CONVERTERS
ELECTRIC CONDUCTIVITY
ELECTRIC CURRENTS
ELECTRICAL PROPERTIES
ELECTROCHEMICAL CELLS
ELECTRODES
ELECTROLYTES
ELEMENTS
FLUIDS
FLUORINATED ALIPHATIC HYDROCARBONS
FUEL CELLS
FUEL GAS
FUELS
GAS FUELS
GASES
HALOGENATED ALIPHATIC HYDROCARBONS
HYDROGEN COMPOUNDS
ION EXCHANGE MATERIALS
MATERIALS
MEMBRANES
NONMETALS
ORGANIC COMPOUNDS
ORGANIC FLUORINE COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANIC POLYMERS
OXIDATION
OXYGEN COMPOUNDS
PERFORMANCE
PHYSICAL PROPERTIES
PLATES
POLYETHYLENES
POLYMERS
POLYOLEFINS
POLYTETRAFLUOROETHYLENE
POROSITY
POWER GENERATION
SHEETS
WATER
WATERPROOFING