Abstract: According to one embodiment of the present invention, provided is an ionic conductor comprising lithium (Li), borohydride (BH4?), phosphorus (P), and sulfur (S), wherein, in X-ray diffraction (CuK?: ?=1.5405 ?), the ionic conductor has diffraction peaks, at least, at 2?=14.4±1.0 deg, 15.0±1.0 deg, 24.9±1.0 deg, 29.2±1.5 deg, 30.3±1.5 deg, 51.1±2.5 deg and 53.5±2.5 deg.

Abstract: One embodiment provides a solid-state battery that has a positive-electrode layer; a negative-electrode layer; and a lithium-ion-conducting solid electrolyte layer disposed between the positive-electrode layer and the negative-electrode layer. The positive-electrode layer contains a positive-electrode active material and a solid electrolyte comprising a hydride of a complex. Said positive-electrode active material is sulfur-based, and the solid electrolyte layer contains a solid electrolyte comprising a hydride of a complex.

Abstract: One embodiment provides a solid-state battery that has a positive-electrode layer, a negative-electrode layer, and a lithium-ion-conducting solid electrolyte layer disposed between the positive-electrode layer and the negative-electrode layer. The positive-electrode layer and/or the solid electrolyte layer contains a sulfide solid electrolyte, the negative-electrode layer and/or the solid electrolyte layer contains a solid electrolyte comprising a hydride of a complex, and at least part of the sulfide solid electrolyte is in contact with at least part of the solid electrolyte comprising a hydride of a complex.

Abstract: According to one embodiment of the present invention, provided is an ionic conductor comprising lithium (Li), borohydride (BH4?), phosphorus (P), and sulfur (S), wherein, in X-ray diffraction (CuK?: ?=1.5405 ?), the ionic conductor has diffraction peaks, at least, at 2?=14.4±1.0 deg, 15.0±1.0 deg, 24.9±1.0 deg, 29.2±1.5 deg, 30.3±1.5 deg, 51.1±2.5 deg and 53.5±2.5 deg.

Abstract: A solid electrolyte comprising: LiBH4; and an alkali metal compound represented by the following formula (1): MX??(1) (in the formula (1), M represents an alkali metal atom, and X represents one selected from the group consisting of halogen atoms, NR2 groups (each R represents a hydrogen atom or an alkyl group) and N2R groups (R represents a hydrogen atom or an alkyl group)).

Abstract: One embodiment provides a solid-state battery that has a positive-electrode layer, a negative-electrode layer, and a lithium-ion-conducting solid electrolyte layer disposed between the positive-electrode layer and the negative-electrode layer. The positive-electrode layer and/or the solid electrolyte layer contains a sulfide solid electrolyte, the negative-electrode layer and/or the solid electrolyte layer contains a solid electrolyte comprising a hydride of a complex, and at least part of the sulfide solid electrolyte is in contact with at least part of the solid electrolyte comprising a hydride of a complex.

Abstract: One embodiment provides a solid-state battery that has a positive-electrode layer; a negative-electrode layer; and a lithium-ion-conducting solid electrolyte layer disposed between the positive-electrode layer and the negative-electrode layer. The positive-electrode layer contains a positive-electrode active material and a solid electrolyte comprising a hydride of a complex. Said positive-electrode active material is sulfur-based, and the solid electrolyte layer contains a solid electrolyte comprising a hydride of a complex.

Abstract: A solid electrolyte comprising: LiBH4; and an alkali metal compound represented by the following formula (1): MX??(1) (in the formula (1), M represents an alkali metal atom, and X represents one selected from the group consisting of halogen atoms, NR2 groups (each R represents a hydrogen atom or an alkyl group) and N2R groups (R represents a hydrogen atom or an alkyl group)).