Metal/air cells and improved air electrodes for use therein
Patent 3977901 Issued on August 31, 1976. Estimated Expiration Date: 
August 31, 1993. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
August 31, 1993. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2946836 3380856 3527616 3684579 3793085 InventorAssigneeApplicationNo. 05/517115 filed on 10/23/1974US Classes:429/40, Catalytic electrode structure or composition429/30, Solid electrolyte429/33, Electrolyte composition chemically specified429/44Having an inorganic matrix, substrate or supportExaminersPrimary: Mack, John H.Assistant: Feeley, H. A. Attorney, Agent or FirmInternational ClassesH01M 4/96 (20060101)H01M 4/86 (20060101) AbstractAir electrodes for use in electrochemical energy cells which comprise a hydrophilic layer and a hydrophobic layer laminated thereto. The hydrophilic layer essentially comprises a hydrophilic composite which includesI. an oxygen absorption/reduction carbon,Ii. a material selected from the group consisting ofA. CuWO4, NiWO4, CoWO4 and WC with 1-20 wt. % Co. for a unifunctional electrode, orB. WS2, WC, and WC with 1-20 Wt.% Co. for a bi-functional electrode, andIii. 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 of the invention. |
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