Abstract: The solid electrolyte material of the present disclosure is made of Li, Ca, Y, Gd, X, and O, where X is at least one selected from the group consisting of F, Cl, Br, and I; and the molar ratio of O to the sum of Y and Gd is greater than O and 0.51 or less.

Abstract: A solid electrolyte material contains Li, M, and X. M is at least one selected from metallic elements, and X is at least one selected from the group consisting of Cl, Br, and I. A plurality of atoms of X form a sublattice having a closest packed structure. An average distance between two adjacent atoms of X among the plurality of atoms of X is 1.8% or more larger than a distance between two adjacent atoms of X in a rock-salt structure composed only of Li and X.

Abstract: A solid electrolyte material is made of Li, Ca, Y, Gd, X, O, and H, where X is at least one selected from the group consisting of F, Cl, Br, and I; and the molar ratio of O to the sum of Y and Gd is greater than 0 and less than 0.82.

Abstract: The solid electrolyte material of the present disclosure is a solid electrolyte material made of Li, Ca, Y, Gd, X, and O, where X is at least one selected from the group consisting of F, Cl, Br, and I; the molar ratio of O to the sum of Y and Gd in the entire solid electrolyte material is greater than 0 and 0.42 or less; and O is present in a surface region of the solid electrolyte material.

Abstract: The solid electrolyte material of the present disclosure includes Li, Ca, Y, Sm, X, and O, wherein X is at least one selected from the group consisting of F, Cl, Br, and I.

Abstract: A production method for producing a halide, the method includes a heat treatment step of heat-treating a mixed material containing (NH4)aY?3+a, (NH4)bGd?3+b, Li?, and Ca?2 in an inert gas atmosphere, wherein ?, ?, ?, and ? are each independently at least one selected from the group consisting of F, Cl, Br, and I, and the formulas: 0?a?3, 0?b?3, and 0<a+b?6, are satisfied.

Abstract: The solid electrolyte material of the present disclosure includes Li, Ca, Y, Sm, X, O, and H, wherein, X is at least one selected from the group consisting of F, Cl, Br, and I; and the molar ratio of O to the sum of Y and Sm is greater than 0 and less than 0.32.

Abstract: The solid electrolyte material of the present disclosure includes Li, Ca, Y, Sm, X, and O, where Xis at least one selected from the group consisting of F, Cl, Br, and I; and the molar ratio of O to the sum of Y and Sm in a surface area of the solid electrolyte material is higher than the molar ratio of O to the sum of Y and Sm in the entire solid electrolyte material.

Abstract: The production method of the present disclosure includes: heat-treating a material mixture containing LiA, YB3, GdC3, and CaD2 in an inert gas atmosphere. A, B, C, and D are each independently at least one selected from the group consisting of F, Cl, Br, and I. In the heat-treating, the material mixture is heat-treated at higher than or equal to 200° C. and lower than or equal to 700° C.

Abstract: A solid electrolyte material is represented by the following compositional formula (1): Li3-3?-2aY1+?-aMaCl6-x-yBrxIy where, M is at least one selected from the group consisting of Ta and Nb; and ?1<?<1, 0<a<1.2, 0<(3?3??2a), 0<(1+??a), 0?x?6, 0?y?6, and (x+y)?6 are satisfied.

Abstract: A solid electrolyte material contains Li, Y, at least one selected from the group consisting of Mg, Ca, Sr, Ba, Zn, Sc, La, Sm, Bi, Zr, Hf, Nb, and Ta, and at least one selected from the group consisting of Cl, Br, and I. An X-ray diffraction pattern of the solid electrolyte material obtained by using Cu-K? radiation as the X-ray source includes peaks within the range in which the diffraction angle 2? is 25° or more and 35° or less, and also includes at least one peak within the range in which the diffraction angle 2? is 43° or more and 51° or less.

Abstract: A solid electrolyte material contains Li; Y; at least one selected from the group consisting of Mg, Ca, Sr, Ba, Zn, Zr, Nb, and Ta; and at least one selected from the group consisting of Cl, Br, and I. An X-ray diffraction pattern of the solid electrolyte material obtained using Cu—K? radiation as an X-ray source includes peaks in a range of diffraction angles 2? of 30° or more and 33° or less, in a range of diffraction angles 2? of 39° or more and 43° or less, and in a range of diffraction angles 2? of 47° or more and 51° or less.

Abstract: The solid electrolyte material comprises Li, Y, X, and O, where X is one selected from the group consisting of F, Cl, Br, and I, and the molar ratio of O to Y is greater than 0.01 and less than 0.52.

Abstract: The solid electrolyte material comprises Li, Y, X, O, and H, where X is one selected from the group consisting of F, Cl, Br, and I, and the molar ratio of O to Y is greater than 0.01 and less than 0.38.

Abstract: A solid electrolyte material includes a first crystal phase. The first crystal phase has a composition that is deficient in Li as compared with a composition represented by the following composition formula (1).

Abstract: A solid electrolyte composition of the present disclosure includes: a solid electrolyte material having ion-binding properties; and an organic solvent. The organic solvent includes: a halogen-group-containing compound; and at least one selected from the group consisting of an ether-group-containing compound and a hydrocarbon.

Abstract: A solid electrolyte composition of the present disclosure includes: a solid electrolyte material including an oxygen element and a halogen element; and an organic solvent. The organic solvent includes at least one selected from the group consisting of a halogen-group-containing compound and a hydrocarbon. The solid electrolyte material includes at least one selected from the group consisting of Zn, Sn, Al, Sc, Ga, Bi, Sb, Zr, Hf, Ti, Ta, Nb, W, Y, Gd, Tb, and Sm.

Abstract: A solid electrolyte composition according to the present disclosure includes a halide solid electrolyte material and an organic solvent. The halide solid electrolyte material has an average particle size of less than or equal to 1 ?m. The organic solvent consists of at least one selected from the group consisting of a compound having a functional group and a hydrocarbon. The functional group includes at least one selected from the group consisting of an ether group and a halogen group.

Abstract: Provided is a solid electrolyte material comprising Li, Y, Br, and I, wherein in an X-ray diffraction pattern in which Cu-K? is used as a radiation source, peaks are present within all ranges of diffraction angles 2? of 12.5° to 14.0°, 25.0° to 27.8°, 29.2° to 32.3°, 41.9° to 46.2°, 49.5° to 54.7°, and 51.9° to 57.5°.

Abstract: Provided is a solid electrolyte material represented by the following composition formula (1) Li3?3??aY1+??aMaCl6?x?yBrxIy??Formula (1) where M is one or more kinds of elements selected from the group consisting of Zr, Hf, and Ti; ?1<?<2; 0<a<1.5; 0<(3?3??a); 0<(1+??a); 0?x?6; 0?y?6; and (x+y)?6.