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Solid polymer electrolytes

  • US 6,645,675 B1
  • Filed: 09/02/1999
  • Issued: 11/11/2003
  • Est. Priority Date: 09/02/1999
  • Status: Expired due to Fees
First Claim
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1. A solid polymer electrolyte having a conductivity greater than 1×

  • 10

    4
    S/cm at 25°

    C. or below, absent any solvent, and comprising a mixture of;

    a base polymer material comprising at least one ionically conductive polymer and having an initial conductivity of at least about 1×

    10

    5
    S/cm at 25°

    C. when combined with a metal salt in the absence of solvent;

    a metal salt;

    an inorganic filler having an average particle size less than 0.05 micron in diameter and a surface area of at least approximately 100 m2/g; and

    an ionic conducting material having an average particle size less than 0.1 micron in diameter and an initial ionic conductivity of at least 2×

    10

    3
    S/cm at 25°

    C., wherein the solid polymer electrolyte does not contain a solvent.

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