Abstract: A positive electrode includes a positive electrode current collector, an adhesive layer, and a positive electrode layer. The positive electrode current collector, the adhesive layer, and the positive electrode layer are stacked in this order. The adhesive layer contains spherical carbon and fibrous carbon as an electrically conductive material, and contains an acrylic binder as an adhesive.

Abstract: The positive electrode active material of the present disclosure includes a complex oxide represented by a formula (1): LiNixMe1-xO2 as a main component and contains water generated during heating at 300° C. in Karl Fischer titration in an amount of 317.5 ppm by mass or less. Here, x satisfies 0.5 ? x ? 1, and Me is at least one element selected from the group consisting of Mn, Co, and Al.

Abstract: A solid electrolyte composition includes a solvent and a solid electrolyte dispersed in the solvent. The solid electrolyte includes a halide solid electrolyte. The solvent has a polar component ?p of Hansen solubility parameters that is greater than 0 and less than 5.9. The halide solid electrolyte contains Li, M1, and X1. M1 is at least one selected from the group consisting of metalloid elements and metal elements other than Li. X1 is at least one selected from the group consisting of F, Cl, Br, and I.

Abstract: The positive electrode active material of the present disclosure includes a complex oxide represented by formula (1): LiNixMe1-xO2 as a main component and has a hydrogen element content of 238.8 ppm by mass or less. Here, x satisfies 0.5?x?1, and Me is at least one element selected from the group consisting of Mn, Co, and Al.

Abstract: The positive electrode active material of the present disclosure includes a complex oxide represented by a formula (1): LiNixMe1-xO2 as a main component and contains water in an amount of 2.9 ppm by mass or more and 44.7 ppm by mass or less. Here, x satisfies 0.5?x?1, and Me is at least one element selected from the group consisting of Mn, Co, and Al.

Abstract: A solid electrolyte material contains Li, M, and X. M contains Y, and X is at least one selected from the group consisting of Cl, Br, and I. A first converted pattern, which is obtained by converting the X-ray diffraction pattern of the solid electrolyte material to change its horizontal axis from the diffraction angle to q, includes its base peak within the range in which q is 2.109 ??1 or more and 2.315 ??1 or less. A second converted pattern, which is obtained by converting the X-ray diffraction pattern to change its horizontal axis from the diffraction angle to q/q0, where q0 is the q corresponding to the base peak in the first converted pattern, includes a peak within each of the range in which q/q0 is 1.28 or more and 1.30 or less and the range in which q/q0 is 1.51 or more and 1.54 or less.

Abstract: The production method of the present disclosure includes heat-treating a material mixture containing a compound containing Y, a compound containing Gd, NH4?, Li?, and Ca?2 in an inert gas atmosphere. The compound containing Y is at least one selected from the group consisting of Y2O3 and Y?3, and the compound containing Gd is at least one selected from the group consisting of Gd2O3 and Gd?3. The material mixture contains at least one selected from the group consisting of Y2O3 and Gd2O3, and ?, ?, ?, ?, and ? are each independently at least one selected from the group consisting of F, Cl, Br, and I.

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: 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: 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 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: 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: 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, 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, 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: 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: 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.