Abstract: A method of producing a sulfide solid-state electrolyte having an LGPS-type crystal phase containing Li, Sn, P and S includes: amorphizing a raw material composition, to obtain an ion-conductive material; heating the ion-conductive material in an inert gas stream, to obtain a sulfide solid-state electrolyte intermediate; pulverizing the sulfide solid-state electrolyte intermediate into a fine particle form, to obtain intermediate fine particles; and heating the intermediate fine particles at a temperature of from 300° C. to 450° C. in an inert gas stream, to obtain a sulfide solid-state electrolyte.

Abstract: In a method of recovering a sulfide solid electrolyte, the sulfide solid electrolyte includes lithium, phosphorus, sulfur, and an M element, the M element includes at least one element selected from a group consisting of germanium, tin, and silicon, and the sulfide solid electrolyte is heated at a temperature of 100° C. or more under an environment with a dew point temperature of ?70° C. or less.

Abstract: A main object of the present disclosure is to provide a sulfide solid electrolyte with high ion conductivity. The present disclosure achieves the object by providing a sulfide solid electrolyte including a LGPS-type crystal phase containing a Li element, a Sn element, a P element, and a S element, wherein: the sulfide solid electrolyte has a composition represented by Li4?xSn1?xPxS4, provided that 0.67<x<0.76; the sulfide solid electrolyte includes, in a 31P-NMR measurement, a first peak of which peak position is 77 ppm±1 ppm, and a second peak of which peak position is 93 ppm±1 ppm; and when S1 designates a total area of all peaks obtained in the 31P-NMR measurement, and S2 designates a total area of the first peak and the second peak, a rate of S2 with respect to S1, which is S2/S1 is 92.0% or more.

Abstract: An all-solid-state battery includes a case, a battery element, and a restraint component. The case accommodates the battery element. The battery element includes an electrode part and a resin part. The resin part covers at least a part of a side face of the electrode part. The restraint component applies a first pressure to the electrode part. The restraint component applies a second pressure to the resin part. The ratio of the second pressure to the first pressure is from 1.5 to 18.

Abstract: A sulfide solid electrolyte material contains element M1, element M2, element M3 and element S. Element M1 is at least one type selected from the group consisting of Li, Na, K, Mg Ca and Zn, and contains at least one of Li and Na. Element M2 is at least one type selected from the group consisting of P, Sb, Si, Ge, Sn, B, Al, Ga, In, Ti, Zr and V, and contains at least P.

Abstract: An electrode for an all-solid-state battery comprises an active material layer. The active material layer includes an active material, a first solid electrolyte, and a second solid electrolyte. The active material, the first solid electrolyte, and the second solid electrolyte satisfy a relationship of the following expression (1) “G2<G1<GA”. GA represents a compressive elastic modulus of the active material. G1 represents a compressive elastic modulus of the first solid electrolyte. G2 represents a compressive elastic modulus of the second solid electrolyte. Further, the active material and the first solid electrolyte satisfy a relationship of the following expression (2) “0.41rA<r1”. rA represents a particle radius of the active material. r1 represents a particle radius of the first solid electrolyte.

Abstract: A secondary battery system of the present disclosure includes a secondary battery and a heating device, wherein the secondary battery includes a positive electrode and a negative electrode, and one or both of the positive electrode and the negative electrode include an active material and a granulated body, the active material includes a material whose volume changes with charge and discharge of the secondary battery, the granulated body includes an inorganic solid electrolyte and an alkali metal-containing salt, and a target heated by the heating device includes the alkali metal-containing salt.

Abstract: An all-solid-state battery includes a case, a battery element, and a restraint component. The case accommodates the battery element. The battery element includes an electrode part and a resin part. The resin part covers at least a part of a side face of the electrode part. The restraint component applies a first pressure to the electrode part. The restraint component applies a second pressure to the resin part. The ratio of the second pressure to the first pressure is from 1.5 to 18.

Abstract: An all-solid-state battery includes a case, a battery element, and a restraint component. The case accommodates the battery element. The battery element includes an electrode part and a resin part. The resin part covers at least a part of a side face of the electrode part. The restraint component applies a first pressure to the electrode part. The restraint component applies a second pressure to the resin part. The ratio of the second pressure to the first pressure is from 1.5 to 18.

Abstract: A main object of the present disclosure is to provide a sulfide solid electrolyte with high ion conductivity. The present disclosure achieves the object by providing a sulfide solid electrolyte including a LGPS-type crystal phase containing a Li element, an M element, a P element, and a S element, wherein: the M element is at least one kind or more of an element selected from Sb, Si, Ge, Sn, B, Al, Ga, In, Ti, Zr, V, and Nb; and in a 31P-NMR measurement, when y (ppm) designates a half value width of a peak having an apex at a position of 77 ppm±1 ppm, and x (%) designates a rate of impurity phase measured, the sulfide solid electrolyte satisfies a below formula (1): y??0.0431x+4.28??(1).

Abstract: The secondary battery system according to the present disclosure includes a secondary battery, a heating device, and a control device, and the secondary battery includes a positive electrode and a negative electrode, and one or both of the positive electrode and the negative electrode include an active material, a solid electrolyte, and a Li containing salt, and the active material includes a material whose volume changes with charging and discharging of the secondary battery, and a target heated by the heating device includes Li containing salt, and the control device controls the heating by the heating device such that when it is determined that the performance of the secondary battery is equal to or lower than a certain level, the temperature of Li containing salt becomes equal to or higher than the melting point of Li containing salt.

Abstract: The lithium ion conductor of the present disclosure includes a first compound and a second compound, wherein the first compound is a complex halide represented by LiGaX4 (X is one or more halogens), the second compound is tetrabutylammonium bis(trifluoromethanesulfonyl)imide, and the ratio of the second compound to the sum of the first compound and the second compound is more than 0 mol % and 30 mol % or less.

Abstract: The present disclosure provides an ionic conductor containing Li, P, S, BH4, and I, and includes a crystalline phase X having peaks at a position of 2?=29.1°±0.5° and 30.4°±0.5° in XRD measurement using a CuK? ray.

Abstract: Disclosed is an alkali metal ion conductor capable of improving filling ratio and ionic conductivity. The alkali metal ion conductor of the present disclosure comprises an alkali metal salt, wherein said alkali metal salt comprises a quaternary ammonium cation, an alkali metal ion, a first sulfonylamide anion, and a second sulfonylamide anion different from said first sulfonylamide anion.

Abstract: Disclosed is a technique capable of improving the filling rate of an electrolytic material and inhibiting a decrease in ionic conductivity of the electrolytic material. The electrolytic material of the present disclosure is an electrolytic material used in secondary cells, comprising a sulfide solid electrolyte and an alkali metal salt, wherein the alkali metal salt comprises a quaternary ammonium cation, an alkali metal ion, and a bistrifluoromethanesulfonylamide anion.

Abstract: A main object of the present disclosure is to provide a sulfide solid electrolyte including water resistance while maintaining an argyrodite type crystal structure. The present disclosure achieves the object by providing a sulfide solid electrolyte including an argyrodite type crystal phase, and containing Li, Ge, Sb, S, I, and A, the A is an anion with ionic radius larger than that of a sulfide ion.

Abstract: A sulfide-based solid electrolyte having a composition represented by LiaGe1+bSbcP2?b?cS12, wherein 10?a?10.65, 0.35?b?0.65, and 0.075?c?0.15 are satisfied.

Abstract: A main object of the present disclosure is to provide a sulfide solid electrolyte with excellent water resistance. The present disclosure achieves the object by providing a sulfide solid electrolyte including a LGPS type crystal phase, and containing Li, Ge, P, and S, wherein: when an X-ray photoelectron spectroscopy measurement is conducted to a surface of the sulfide solid electrolyte, a proportion of Ge2+ with respect to total amount of Ge is 20% or more.

Abstract: A main object of the present disclosure is to provide a sulfide solid electrolyte with high ion conductivity. In the present disclosure, the above object is achieved by providing a sulfide solid electrolyte comprising: a Li element, an M element (M is at least one kind of P, Ge, Si and Sn), and a S element, and the sulfide solid electrolyte has an argyrodite type crystal phase, in 31P-MAS-NMR, the sulfide solid electrolyte has peak A at 82.1 ppm±0.5 ppm and peak B at 86.1 ppm±0.5 ppm, and when an area ratio of the peak A is regarded as SA, and an area ratio of the peak B is regarded as SB, a proportion of the SB to the SA, that is SB/SA, is 0.23 or less.

Abstract: Provided are sulfide solid electrolyte particles which have sufficient ion conductivity and which are, when used in an all-solid-state battery, configured to suppress a resistance increase rate after charge-discharge cycles, and an all-solid-state battery comprising the sulfide solid electrolyte particles. The sulfide solid electrolyte particles may be sulfide solid electrolyte particles comprising a sulfide solid electrolyte that comprises Li, P, S and a halogen as constituent elements, wherein an oxygen/sulfur element ratio of a particle surface measured by XPS, is 0.79 or more and 1.25 or less, and an oxygen/sulfur element ratio at a depth of 30 nm (in terms of a SiO2 sputter rate) from the particle surface measured by XPS, is 0.58 or less.