ELECTRODE INCLUDING HYDROPHOBIC POLYMER,METHOD OF PREPARATION AND FUEL CELL THEREWITH

• US 3,522,094 A
• Filed: 09/30/1965
• Issued: 07/28/1970
• Est. Priority Date: 09/30/1965
• Status: Expired due to Term

• Current Assignee: Peter D. Richman
• Original Assignee: Peter D. Richman
• Inventors: Richman, Peter D.
• Application Number:
  US04/491,871
• Time in Patent Office: 1,762 Days
• US Class Current: 429/513
• CPC Class Codes: H01M 4/8807 Gas diffusion layers
• CPC Class Codes: H01M 4/8821 Wet proofing
• CPC Class Codes: H01M 4/8853 Electrodeposition
• CPC Class Codes: Y02E 60/50 Fuel cells
• CPC Class Codes: Y10S 205/917 Treatment of workpiece between coating steps

Abstract

1,165,677. Fuel cell electrodes. LEESONA CORP. 23 Sept., 1966 [30 Sept., 1965], No. 42458/66. Heading H1B. Electrodes are made by applying a mixture of a base metal and a hydrophobic polymer to a porous metal support, heating the resultant structure to bond or sinter the polymer and then replacing the exposed surface of the base metal with a more noble metal. The replacement can be (1) electrolytic; (2) by amalgamation with Hg followed by replacement of the Hg; (3) by using a multi-component or multi-phase base metal alloy, selectively corroding the components or phases and simultaneously or subsequently replacing the metal with a noble metal; or (4) by impregnating the base metal with hydrogen and then replacing electrolytically the hydrogen on the base metal with a noble metal, in a modification of this method the base metal is replaced by niobium oxide.

Claims

10. A PROCESS FOR PREPARING AN ELECTRODE COMPRISING MIXING A RELATIVELY BASE METAL AND A HYDROPHOBIC POLYMER;

FORMING AN ELECTRODE THEREFROM AND REPLACING SUBSTANTIALLY ONLY THE EXPOSED SURFACE LAYER OF SAID BASE METAL WITH A MORE NOBLE METAL.