Abstract: A method for producing aluminum includes: a dissolution step of dissolving a hydrate containing Al in water to prepare an aqueous solution that contains Al ions; an extraction step of bringing an organic phase that is composed of an extractant into contact with an aqueous phase that is composed of the aqueous solution to extract the Al ions in the aqueous phase into the organic phase; and an electrodeposition step of electrolyzing the organic phase as an electrolytic solution to electrodeposit metallic Al onto a surface of a cathode from the Al ions in the electrolytic solution.

Abstract: A production method of aluminum including: a step of synthesizing an aluminum compound from a mixture including a halogenated aluminum hydrate and a perfluoroalkylsulfonimide-type or perfluoroalkylsulfonamide-type ionic liquid represented by general formula (1); a step of dissolving the aluminum compound in a nitrile-based organic solvent to prepare an aluminum electrolyte; a step of adding at least one ligand selected from a phosphorus compound and an organic compound having an amide group to the aluminum electrolyte and dehydrating water molecules from a hydrate included in the aluminum electrolyte; and a step of electrodepositing aluminum on a cathode by allowing electricity to pass between an anode and the cathode in the aluminum electrolyte after the dehydrating step.

Abstract: A production method of aluminum including: a step of synthesizing an aluminum compound from a mixture including a halogenated aluminum hydrate and a perfluoroalkylsulfonimide-type or perfluoroalkylsulfonamide-type ionic liquid represented by general formula (1); a step of dissolving the aluminum compound in a nitrile-based organic solvent to prepare an aluminum electrolyte; a step of adding at least one ligand selected from a phosphorus compound and an organic compound having an amide group to the aluminum electrolyte and dehydrating water molecules from a hydrate included in the aluminum electrolyte; and a step of electrodepositing aluminum on a cathode by allowing electricity to pass between an anode and the cathode in the aluminum electrolyte after the dehydrating step.

Abstract: A method for producing aluminum includes: a dissolution step of dissolving a hydrate containing Al in water to prepare an aqueous solution that contains Al ions; an extraction step of bringing an organic phase that is composed of an extractant into contact with an aqueous phase that is composed of the aqueous solution to extract the Al ions in the aqueous phase into the organic phase; and an electrodeposition step of electrolyzing the organic phase as an electrolytic solution to electrodeposit metallic Al onto a surface of a cathode from the Al ions in the electrolytic solution.

Abstract: A method of producing a silicon-plated metal sheet, comprises: melting at least one of a silicon-containing alkali metal salt or a silicon-containing ammonium salt in a molten salt comprising lithium chloride, potassium chloride, and an alkali metal fluoride to prepare a molten salt electrolytic bath; and performing constant-current pulse electrolysis or constant-potential pulse electrolysis with a metal sheet, serving as a cathode, immersed in the molten-salt electrolytic bath under conditions of a pulse duration of from 0.1 seconds to 3.0 seconds and a duty ratio of from 0.5 to 0.94 to thereby form a silicon layer on the metal sheet.

Abstract: 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), R1 represents an unsubstituted or substituent-containing C1 to C20 alkyl group, R2 represents a C1 to C4 alkyl group or the like, each of R3 and R4 independently represents a hydrogen atom or the like, X represents AlCl4 or the like, and Y represents Al2Cl7 or the like.

Abstract: 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), R1 represents an unsubstituted or substituent-containing C1 to C20 alkyl group, R2 represents a C1 to C4 alkyl group or the like, each of R3 and R4 independently represents a hydrogen atom or the like, X represents AlCl4 or the like, and Y represents Al2Cl7 or the like.

Abstract: 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), R1 represents an unsubstituted or substituent-containing C1 to C20 alkyl group, R2 represents a C1 to C4 alkyl group or the like, each of R3 and R4 independently represents a hydrogen atom or the like, X represents AlCl4 or the like, and Y represents Al2Cl7 or the like.