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Method of forming a reactive metal anode having an edge seal

  • US 4,618,503 A
  • Filed: 03/14/1985
  • Issued: 10/21/1986
  • Est. Priority Date: 03/14/1985
  • Status: Expired due to Fees
First Claim
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1. A method of forming a sealed reactive metal anode useful in an electrochemical cell comprising said anode, a cathode and an electrolyte in which said anode and cathode are in operation during operation of said cell, said method comprising the steps of:

  • (a) providing an anode of said reactive metal, said anode defining a first surface which contacts said electrolyte and at least one additional surface at the perimeter of at least a portion of said first surface; and

    ,(b) coating said additional surface with a hydrophobic polymer which is substantially chemically inert with respect to said reactive metal and said electrolyte and wherein;

    (i) the ratio of the flexural modulus to the flexural strength of said polymer is at least about 25;

    (ii) the Izod impact value of said polymer is less than or equal to about 2.0 ft.-lb./in.; and

    ,(iii) the percent elongation of said polymer is less than or equal to about 20%, said first surface being substantially free of said hydrophobic polymer, and said coating step (b) being carried out in an atmosphere which is non-reactive with respect to said reactive metal.

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