Metal/air cells and improved air electrodes for use therein
Air electrodes for use in electrochemical energy cells comprise a hydrophilic layer and a hydrophobic layer laminated to it. The hydrophilic layer essentially comprises a hydrophilic composite which includes an oxygen absorption/reduction carbon; a material selected from the group consisting of CuWO/sub 4/, NiWO/sub 4/, CoWO/sub 4/, and WC with 1 to 20 wt percent Co for a unifunctional electrode, or WS/sub 2/, WC, and WC with 1 to 20 wt percent Co for a bi-functional electrode; and a nonwetting agent containing a polytetrafluoroethylene. A metal current collector is molded into the composite to form a substantially flat hydrophilic layer. A catalyst is preferably incorporated into the composite of a bifunctional electrode to increase cycling life. The hydrophobic layer, comprising a sheet of porous fluorinated ethylene propylene, polypropylene or polytetrafluoroethylene, is laminated to the hydrophilic layer to complete the air electrodes. 11 figures.
- Assignee:
- Westinghouse Electric Corp.
- Patent Number(s):
- US 3977901
- OSTI ID:
- 7252020
- Resource Relation:
- Patent File Date: Filed date 23 Oct 1974
- Country of Publication:
- United States
- Language:
- English
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Bifunctional air electrodes containing elemental iron powder charging additive
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30 DIRECT ENERGY CONVERSION
HYDROGEN FUEL CELLS
CATHODES
IRON-AIR BATTERIES
METAL-GAS BATTERIES
CARBON
COBALT
COPPER TUNGSTATES
DESIGN
ELECTRIC-POWERED VEHICLES
NICKEL CARBIDES
POTASSIUM HYDROXIDES
TEFLON
ALKALI METAL COMPOUNDS
CARBIDES
CARBON COMPOUNDS
COPPER COMPOUNDS
DIRECT ENERGY CONVERTERS
ELECTRIC BATTERIES
ELECTROCHEMICAL CELLS
ELECTRODES
ELEMENTS
ENERGY STORAGE SYSTEMS
FLUORINATED ALIPHATIC HYDROCARBONS
FUEL CELLS
HALOGENATED ALIPHATIC HYDROCARBONS
HYDROGEN COMPOUNDS
HYDROXIDES
METALS
NICKEL COMPOUNDS
NONMETALS
ORGANIC COMPOUNDS
ORGANIC FLUORINE COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANIC POLYMERS
OXYGEN COMPOUNDS
PETROCHEMICALS
PETROLEUM PRODUCTS
PLASTICS
POLYETHYLENES
POLYMERS
POLYOLEFINS
POLYTETRAFLUORETHYLENE
POTASSIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
TUNGSTATES
VEHICLES
250903* - Energy Storage- Batteries- Materials
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300503 - Fuel Cells- Materials
Components
& Auxiliaries