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Method for fabricating a carbon electrode substrate

  • US 4,115,528 A
  • Filed: 08/15/1977
  • Issued: 09/19/1978
  • Est. Priority Date: 08/15/1977
  • Status: Expired due to Term
First Claim
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1. A method for fabricating a porous carbon sheet comprising the steps of:

  • coating chopped carbon fibers with a low viscosity mixture of at least 70% by weight furfuryl alcohol, 0.25-5%, by weight, of an aqueous solution of 85% phosphoric acid or an equivalent amount of phosphoric acid, and a balance of water;

    forming a mat of said coated fibers;

    polymerizing the furfuryl alcohol and curing the mat by heating the mat to a temperature between 50°

    -200°

    C.; and

    carbonizing the cured mat by heating to at least 1500°

    C.

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