Patent ID: 8308970

Claim:
An ion conductor, consisting of an acid-base mixture, the mixture consisting of: a base component consisting of a mixture of unsubstituted imidazole and at least one selected from the group consisting of: 2-ethyl-4-methylimidazole, 4-methylimidazole, 2-ethylimidazole, and mixtures thereof, and an acid component selected from the group consisting of: sulfuric acid, trifluoromethane sulfonic acid, methanesulfonic acid and mixtures thereof, wherein, the acid-base mixture is ion conductive and has an ion conductivity of 10 −4 Scm −1 or higher at 100° C., the amount of unsubstituted imidazole is 60% or less by total weight of the base component, and the acid-base mixture is a liquid at 120° C. or lower.