The present disclosure provides a method of producing a sulfide solid electrolyte material which includes a preparing process of preparing composite particles including a solid solution including a Li.sub.2S component and a LiBr component; an addition process of adding the composite particles and a phosphorus source to a reaction chamber; and a milling process in which a mechanical milling treatment is performed on the composite particles and the phosphorus source in the reaction chamber while thermal energy is applied.

The present disclosure provides a method of producing a sulfide solid electrolyte material which includes a preparing process of preparing composite particles including a solid solution including a Li.sub.2S component and a LiBr component; an addition process of adding the composite particles and a phosphorus source to a reaction chamber; and a milling process in which a mechanical milling treatment is performed on the composite particles and the phosphorus source in the reaction chamber while thermal energy is applied.

A LiSnOS compound, a manufacturing method therefor and use thereof as an electrolyte material of Li-ion batteries, and a LiSnOS hybrid electrolyte are provided. The LiSnOS compound of the present invention is laminated SnOS embedded with lithium ions. The LiSnOS compound is represented by the formula Li.sub.3x[Li.sub.xSn.sub.1x(O,S).sub.2], where x>0. The manufacturing method for a LiSnOS compound includes the following steps of: (S1000) providing a SnOS compound; (S2000) adding a lithium source into the SnOS compound to form a LiSnOS precursor; and (S3000) performing calcination on the LiSnOS precursor in a vulcanization condition.

Materials and methods for preparing Cu.sub.2XSnY.sub.4 nanoparticles, wherein X is Zn, Cd, Hg, Ni, Co, Mn or Fe and Y is S or Se, (CXTY) are disclosed herein. The nanoparticles can be used to make layers for use in thin film photovoltaic (PV) cells. The CXTY materials are prepared by a colloidal synthesis in the presence of labile organo-chalcogens. The organo-chalcogens serves as both a chalcogen source for the nanoparticles and as a capping ligand for the nanoparticles.

Provided are a solid electrolyte composition including a sulfide-based inorganic solid electrolyte and a plurality of kinds of alkane dispersion media, in which the plurality of kinds of alkane dispersion media include, with respect to a peak of each alkane dispersion medium obtained by measurement under specific conditions using a gas chromatography, two kinds of alkane dispersion media in which a difference in retention time between mutually adjacent peaks of dispersion media is more than 0 minutes and within 0.2 minutes, a solid electrolyte-containing sheet, an all-solid state secondary battery, and methods for manufacturing a solid electrolyte-containing sheet and an all-solid state secondary battery.

Provided is a solid electrolyte having a high ion conductivity and excellent in battery performance not going through a step of removing water such as a drying step, while simplifying the production process and reducing the production cost. Specifically, provided is a method for producing a sulfide-based solid electrolyte, including causing a reaction of an alkali metal sulfide and a specific substance through treatment of mixing, stirring, grinding or a combination thereof, in the absence of a solvent or in a solvent except for water.

Provided is a solid electrolyte having a high ion conductivity and excellent in battery performance not going through a step of removing water such as a drying step, while simplifying the production process and reducing the production cost. Specifically, provided is a method for producing a sulfide-based solid electrolyte, including causing a reaction of an alkali metal sulfide and a specific substance through treatment of mixing, stirring, grinding or a combination thereof, in the absence of a solvent or in a solvent except for water.

(Problem to be Solved) The present invention was made in view of the above-described problems, with an object of providing a LiPS-based sulfide solid electrolyte material with both excellent electrochemical stability and a high lithium ion conductivity, providing a method of producing the LiPS-based sulfide solid electrolyte material, and providing a lithium battery including the sulfide solid electrolyte material. (Solution) There is provided a sulfide solid electrolyte material including a Li element, a P element, and a S element and having peaks at positions of 2=17.900.20, 29.00.50, and 29.750.25 in powder X-ray diffraction measurement using a Cu-K ray having an X-ray wavelength of 1.5418 , in which assuming that the diffraction intensity of the peak at 2=17.900.20 is I.sub.A and the diffraction intensity of the peak at 2=18.500.20 is I.sub.B, a value of I.sub.B/I.sub.A is less than 0.50.

(Problem to be Solved) The present invention was made in view of the above-described problems, with an object of providing a LiPS-based sulfide solid electrolyte material with both excellent electrochemical stability and a high lithium ion conductivity, providing a method of producing the LiPS-based sulfide solid electrolyte material, and providing a lithium battery including the sulfide solid electrolyte material. (Solution) There is provided a sulfide solid electrolyte material including a Li element, a P element, and a S element and having peaks at positions of 2=17.900.20, 29.00.50, and 29.750.25 in powder X-ray diffraction measurement using a Cu-K ray having an X-ray wavelength of 1.5418 , in which assuming that the diffraction intensity of the peak at 2=17.900.20 is I.sub.A and the diffraction intensity of the peak at 2=18.500.20 is I.sub.B, a value of I.sub.B/I.sub.A is less than 0.50.

A solid electrolyte composition includes an inorganic solid electrolyte (A) having ion conductivity of a metal belonging to Group I or II of the periodic table, a binder (B), a dispersion medium (C), and a solvent (D) having any one of a fluorine atom, an oxygen atom, a nitrogen atom, or a chlorine atom in a chemical structure, in which a polymer constituting the binder (B) has a partial structure including an acyclic siloxane structure represented by General Formula (I) and a partial structure represented by General Formula (II). A solid electrolyte-containing sheet has a layer constituted of the solid electrolyte composition. The all-solid state secondary battery includes the solid electrolyte-containing sheet. Methods for manufacturing a solid electrolyte-containing sheet and an all-solid state secondary battery include a step of applying the solid electrolyte composition onto a base material.

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