ALUMINUM-HALOGEN FUEL CELL

An aluminum-halogen fuel cell has a positive electrode (2), a negative electrode (3), and an electrolyte (4) containing an ionic liquid represented by formula (1) or the like. In formula (1), Rrepresents an unsubstituted or substituent-containing C1 to C20 alkyl group, Rrepresents a C1 to C4 alkyl group or the like, each of Rand Rindependently represents a hydrogen atom or the like, X represents AlClor the like, and Y represents AlClor the like.