Low cost bipolar current collector-separator for electrochemical cells
Patent 4214969 Issued on July 29, 1980. Estimated Expiration Date: 
January 2, 1999. 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.
January 2, 1999. 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 3134696 Solid polymer electrolyte cell construction Electrically conductive rear view mirror Novel cathode and bipolar electrode incorporating the same Thin sheet apparatus and a fluid flow device Method of electrolysis, and electrode for the electrolysis Patent #: 4135995 InventorAssigneeApplicationNo. 06/000489 filed on 01/02/1979US Classes:204/255, With feeding and/or withdrawal means204/263, With feeding and/or withdrawal means204/279, Elements204/290.06, And noble metal (i.e., Ru, Rh, Pd, Os, Ir, Pt, Ag, or Au) or compound containing204/290.07, And free carbon containing205/628, Oxygen and hydrogen produced252/511, Resin, rubber, or derivative thereof containing429/38, Having support or spacers with fluid distribution means429/39And fluid directing meansExaminersPrimary: Mack, John H.Assistant: Valentine, D. R. Attorney, Agent or FirmInternational ClassesC25B 9/20 (20060101)C25B 9/04 (20060101) H01M 8/02 (20060101) C25B 9/18 (20060101) AbstractA bipolar current collector-separator for electrochemical cells consists of a molded aggregate of electro-conductive graphite and a thermoplastic fluoropolymer combined in a weight ratio of 2.5:1 to 16:1. The bulk resistivity of such a molded bipolar current collector-separator is less than 4×10-3 ohm inches (Ω in.). It has excellent corrosion resistance to a variety of feedstocks such as brine, aqueous HCl, etc. and to various electrolysis products such as caustic, chlorine, hydrogen, etc. In one alternative form the anodic side of a current collector-separator for a water electrolyzer is covered by a thin layer of a passivated metallic foil thus protecting the graphite current collector against attack by oxygen.Field of SearchElementsWith feeding and/or withdrawal means With feeding and/or withdrawal means Diaphragm type Plural cells Bipolar electrode With feeding and/or withdrawal means Gas Gas Carbon containing And filter Gas feeding Gas withdrawal Plural cells Bipolar electrode With feeding and/or withdrawal means Gas Diaphragms |
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