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Electrochromic salts, solutions, and devices

United States Patent

October 14, 2008
View the Complete Patent at the US Patent & Trademark Office
Los Alamos National Laboratory - Visit the Technology Transfer Division Website
Electrochromic salts. Electrochromic salts of dicationic viologens such as methyl viologen and benzyl viologen associated with anions selected from bis(trifluoromethylsulfonyl)imide, bis(perfluoroethylsulfonyl)imide, and tris(trifluoromethylsulfonyl)methide are produced by metathesis with the corresponding viologen dihalide. They are highly soluble in molten quarternary ammonium salts and together with a suitable reductant provide electrolyte solutions that are used in electrochromic windows.
Burrell; Anthony K. (Los Alamos, NM), Warner; Benjamin P. (Los Alamos, NM), McClesky; T. Mark (Los Alamos, NM)
Los Alamos National Security, LLC (Los Alamos, NM)
10/ 996,927
November 24, 2004
STATEMENT REGARDING FEDERAL RIGHTS This invention was made with government support under Contract No. W-7405-ENG-36 awarded by the U.S. Department of Energy. The government has certain rights in the invention.