Method of reducing leakage current in electrochemichromic solutions and solutions based thereon

  • US 5,142,407 A
  • Filed: 12/22/1989
  • Issued: 08/25/1992
  • Est. Priority Date: 12/22/1989
  • Status: Expired due to Fees
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First Claim
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1. An electrochemichromic cell comprising:

  • spaced plates, each having an inwardly facing conductive surface;

    an electrochemichromic solution located in said cell between said inwardly facing conductive surfaces, said solution comprising;

    a solvent;

    a redox chemical pair in solution in said solvent which colors in the presence of an applied voltage and which bleaches to a colorless condition in the absence of an applied voltage;

    said solvent comprising from at least about 5% weight by volume of a nonpolymeric material having a volume resistivity of at least 5×

    109 ohm.cm at 25°

    C. and dielectric constant of at least 15 at 25°

    C. and 60 hertz.

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