Patent ID: 8218225

Claim:
An electrolyte for electrochromic devices, comprising a mixture of: a solvent; said solvent having a structure according to: wherein X is a carbon atom, nitrogen atom, oxygen atom or aryl group with arbitrary substituents on the aryl ring, with the proviso that when X is a nitrogen atom, R 2 is null, and when X is an oxygen atom, both R 1 and R 2 are null, and when X is an aryl group, R 1 , R 2 and R 5 are all null; wherein R 1 is a hydrogen atom or a carbon-based group; wherein R 2 is a hydrogen atom or a carbon-based group; wherein R 3 is a hydrogen atom or a carbon-based group; wherein R 4 and R 5 individually are selected from a hydrogen atom or a carbon-based group or R 4 and R 5 together forming a carbon-based group, giving said solvent a ring structure; an ionisable substance, comprising a cation and an anion; said ionisable substance forming a solution of said cation and said anion together with said solvent; and a polymer solvated in said mixture; said electrolyte has an apparent Newtonian viscosity in the range of 5-1000 Pa·s at 22° C. and a shear rate of 4 sec −1 .