An improved electrochromic layer containing M.sub.X WO.sub.Y, M.sub.X NiO.sub.Y, M.sub.X VO.sub.Y, M.sub.X MoO.sub.Y, M.sub.XCrO.sub.Y, M.sub.X RuO.sub.Y, M.sub.X IrO.sub.Y, or M.sub.X TiO.sub.Y, where M is selected from the group consisting of alkali metals and alkaline earth metals, X is less than...http://www.google.fr/patents/US5707556?utm_source=gb-gplus-shareBrevet US5707556 - Tungsten oxide for reversible alkali metal intercalation reactions
Tungsten oxide for reversible alkali metal intercalation reactions
