Gas diffusion electrode material

  • US 4,551,220 A
  • Filed: 07/28/1983
  • Issued: 11/05/1985
  • Est. Priority Date: 08/03/1982
  • Status: Expired due to Fees
First Claim
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1. A gas diffusion electrode material which comprises a continuously micro-porous electrically insulating material and partially graphitized carbon black powder uniformly incorporated in the insulating material, said continuously microporous electrically insulating material comprising numerous fine nodes of polytetrafluoroethylene and fine fibers of a polytetrafluoroethylene extending from the nodes and three dimensionally connecting the nodes to one another, the nodes being partially in contact or connected with one another, said partially graphitized carbon black powder being carbon black which has been graphitized to a graphitization ratio of from 10% to 90% by subjecting the carbon black to a treatment at a temperature of from 1,200°

  • C. to 2,500°

    C. for 5 to 60 minutes.

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