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Electrochromic device having a current-reducing additive

  • US 7,031,044 B2
  • Filed: 07/02/2004
  • Issued: 04/18/2006
  • Est. Priority Date: 12/10/2001
  • Status: Expired due to Term
First Claim
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1. An electrochromic medium for use in an electrochromic device, comprising:

  • at least one solvent;

    an anodic electroactive material;

    a cathodic electroactive material, wherein at least one of the anodic and cathodic electroactive materials is electrochromic;

    a current-reducing additive, wherein the current-reducing additive comprises a polymer present in an effective concentration to reduce the current of the electrochromic medium upon application of an electrical potential by at least approximately 20% relative to an electrochromic medium without the current-reducing additive; and

    wherein the electrochromic medium comprises a cross-linked polymer matrix.

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