Patent ID: 8535849

Claim:
An electrochemical cell comprising: an anode; a cathode; and an electrolyte membrane having one side bonded to the anode and the other side bonded to the cathode and containing at least two types of ionic conductors different from each other, wherein each of the ionic conductors comprises: (a) any one of: (i) a cation expressed by any one of Formulae (1) and (2): R 1 R 2 R 3 HN + (1) where, in Formula (1), R 1 , R 2 and R 3 each indicate any one of alkyl groups C1 to C18 except a structure in which R 1 =R 2 =R 3 , R 1 R 2 HS + (2) where, in Formula (2), R 1 and R 2 each indicate any one of alkyl groups C1 to C18 except a structure in which R 1 =R 2 ; (ii) a cation expressed by any one of Formulae (4) and (5): R 5 R 6 H 2 N + (4) where, in Formula (4), R 5 and R 6 each indicate any one of alkyl groups C1 to C18 except a structure in which R 5 =R 6 , R 5 H 2 S + (5) where, in Formula (5), R 5 indicates any one of alkyl groups C1 to C18; (iii) a cation expressed by Formula (7): R 8 H 3 N + (7) where, in Formula (7), R 8 indicates any one of alkyl groups C1 to C18; and (iv) a cation expressed by Formula (9): where, Formula (9) indicates an aliphatic heterocyclic compound containing X in which X indicates N, R 10 indicates any one of alkyl groups C1 to C18, and n indicates any one of 3 to 18; and (b) an anion expressed by Formula (3): R 4 SO 3 − (3) where, in Formula (3), R 4 indicates any one of an alkyl group and a fluoroalkyl group, and wherein one of the at least two types of ionic conductors has the highest oxygen reduction activity among the at least two types of ionic conductors and the other type of ionic conductor has a higher hydrogen oxidation activity than the ionic conductor having the highest oxygen reduction activity.