Electrochromic device containing acid copolymer electrolyte
AssigneeAmerican Cyanamid Company
InventorsSun Y. Huang, Robert D. Giglia
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Abstract
In electrochromic devices having a layer of electrochromic material, e.g. tungsten oxide, in contact with a polymeric electrolyte layer, the stability and speed of the device are improved by using a copolymer of 2-acrylamido-2-methylpropanesulfonic acid and vinyl sulfonic acid as the polymeric electrolyte.
Claims5
In an electrochromic device comprising a film of persistent electrochromic material in ion-conductive contact with a polymeric electrolytic film, and with both of said layers between two electrode layers of opposite polarity, the improvement wherein said polymeric electrolyte film is a copolymer of 2-acrylamido-2-methylpropanesulfonic acid and vinyl sulfonic acid.
Dependencies are inferred from the claim text.