The specification discloses electrochemichromic solutions and devices based on the use of solvents comprising at least about 25% 3-hydroxypropionitrile, 3,3'-oxydipropionitrile, 2-acetylbutyrolactone, 2-methylglutaronitrile, 3-methylsulfolane and mixtures thereof. The specification also discloses vacuum...http://www.google.ca/patents/US5340503?utm_source=gb-gplus-sharePatent US5340503 - High performance electrochemichromic solutions and devices thereof
