Abstract: A method for producing a sulfide solid electrolyte having an argyrodite-type crystal structure may involve: mixing a raw material containing elemental phosphorus at an integrated power of 0.5 kWh/kg or more, and heat-treating a precursor obtained in the mixing at 350 to 500° C.

Abstract: A method of producing lithium hydroxide using a variety of aqueous solutions as a source liquid. The method includes: providing a lithium ion extraction liquid, including a first mixing of an aqueous solution containing lithium and at least one kind of an element other than lithium and a base in a reaction tank, with a pH regulated to 6 or more and 10 or less, a second mixing of the aqueous solution and the base, with a pH regulated to 12 or more, and removal of a hydroxide of the element other than lithium formed through the first and second mixing; recovering only lithium ion from the lithium ion extraction liquid to a recovery liquid with an electrochemical device including a Li-selectively permeable membrane; and performing the regulation of pH by returning the lithium ion extraction liquid after recovering lithium ion with the electrochemical device to the reaction tank.

Abstract: A resin composition containing a compound including phosphorus and sulfur as constituent elements and having a disulfide bond, and a thermoplastic resin.

Abstract: Provided is a lithium hydroxide production method for producing high-purity lithium hydroxide efficiently and at a lower energy, wherein Li ions alone are recovered in a recovery liquid from a lithium ion extract extracted from a processed member of a lithium secondary battery, using a Li permselective membrane, and lithium hydroxide is produced from the recovery liquid.

Abstract: A sulfide solid electrolyte that contains lithium, phosphorus, sulfur, chlorine and bromine, wherein in powder X-ray diffraction analysis using CuK? rays, it has a diffraction peak A at 2?=25.2±0.5 deg and a diffraction peak B at 2?=29.7±0.5 deg, the diffraction peak A and the diffraction peak B satisfy the following formula (A), and a molar ratio of the chlorine to the phosphorus “c (Cl/P)” and a molar ratio of the bromine to the phosphorus “d (Br/P)” satisfies the following formula (1): 1.2<c+d<1.9??(1) 0.845<SA/SB<1.200??(A) where SA is an area of the diffraction peak A and SB is an area of the diffraction peak B.

Abstract: A Li ion recovery member and a Li recovery device may prevent occurrence of breakage of a permselective membrane and implement stable Li ion recovery for a long period of time even when a size of a Li recovery device is increased. The Li ion recovery member may include: a permselective membrane including a Li ion conductor made of an inorganic substance; electrodes; and a reticular elastic body, in which the electrodes are provided on at least one main surface side of the permselective membrane, at least one electrode of the electrodes is a porous electrode or a membrane electrode, and the porous electrode or the membrane electrode is sandwiched between the reticular elastic body and the permselective membrane. The Li recovery device may include a Li ion recovery electrolytic cell including the Li ion recovery member and configured to recover Li ions by electrodialysis.

Abstract: To provide an electrode composite material that is excellent in conductivity through the excellent contact state of a solid electrolyte and an electrode active material, and is capable of exhibiting a high battery capability, containing the sulfide solid electrolyte and the electrode active material, having an electron conductivity parameter X represented by the prescribed expression satisfying 0.30?X?2.10.

Abstract: An ion recovery device including an ion selective permeable membrane with an ion conductive layer containing a lithium ion conductor formed of an inorganic substance, and a support layer is formed of a porous body wherein the ion selective permeable membrane has a configuration (I). In configuration (I) the ion conductive layer is provided in contact with one principal surface side of a support layer, and an electrode is provided in contact with another principal surface side opposite to the one principal surface side on which the ion conductive layer is provided.

Abstract: A sulfide solid electrolyte may include lithium, phosphorus and sulfur, and the sulfide solid electrolyte may have a diffraction peak A at 2?=25.2±0.5 deg and a diffraction peak B at 29.7±0.5 deg in powder X-ray diffraction using CuK? rays, and a crystallite diameter in a range of from 5 to 20 nm.

Abstract: A sulfide solid electrolyte containing the following (A) and (B): (A) a sulfide solid electrolyte having an argyrodite-type crystal structure; and (B) a sulfide solid electrolyte having a crystal structure different from the argyrodite-type crystal structure of the above-mentioned (A).

Abstract: A sulfide solid electrolyte that contains lithium, phosphorus, sulfur, chlorine and bromine, wherein in powder X-ray diffraction analysis using CuK? rays, it has a diffraction peak A at 2?=25.2±0.5 deg and a diffraction peak B at 2?=29.7±0.5 deg, the diffraction peak A and the diffraction peak B satisfy the following formula (A), and a molar ratio of the chlorine to the phosphorus “c (Cl/P)” and a molar ratio of the bromine to the phosphorus “d (Br/P)” satisfies the following formula (1): 1.2<c+d<1.9??(1) 0.845<SA/SB<1.200??(A) where SA is an area of the diffraction peak A and SB is an area of the diffraction peak B.

Abstract: A compound comprising phosphorus atoms and sulfur atoms as constituent elements and having a peak in Raman spectroscopy, the peak being attributable to a disulfide bond bonding between two phosphorus atoms.

Abstract: Provided is a sulfide solid electrolyte containing lithium, phosphorus, sulfur and chlorine, in which a molar ratio of the chlorine to the phosphorus, c (Cl/P), is greater than 1.0 and 1.9 or less, the sulfide solid electrolyte includes an argyrodite-type crystal structure, and a lattice constant of the argyrodite-type crystal structure is 9.820 ? or less.

Abstract: Provided is a sulfide solid electrolyte containing lithium, phosphorus, sulfur and chlorine, in which a molar ratio of the chlorine to the phosphorus, c (Cl/P), is greater than 1.0 and 1.9 or less, the sulfide solid electrolyte includes an argyrodite-type crystal structure, and a lattice constant of the argyrodite-type crystal structure is 9.820 ? or less.

Abstract: To provide an electrode composite material capable of exhibiting a high battery capability, containing a particular crystalline sulfide solid electrolyte and an electrode active material, and a method for producing an electrode composite material, including; firstly mixing a raw material inclusion containing at least one kind of a lithium element, a sulfur element, and a phosphorus element, with a complexing agent, so as to form an electrolyte precursor; heating to decomplex the electrolyte precursor; and secondly mixing a decomplexed material obtained through the decomplexing, with an electrode active material.

Abstract: A sulfide solid electrolyte comprising lithium, phosphorus and sulfur, wherein the sulfide solid electrolyte has a diffraction peak A at 2?=25.2±0.5 deg and a diffraction peak B at 29.7±0.5 deg in powder X-ray diffraction using CuK? rays, an area ratio of a peak derived from PS43? glass to the total area of peaks derived from glass observed in solid 31P-NMR measurement is 90% or more and 100% or less, and an area ratio of peaks derived from glass to the total area of all peaks at 60 to 120 ppm observed in solid 31P-NMR measurement is 1% or more and 45% or less.

Abstract: A sulfide solid electrolyte particles comprising lithium, phosphorus and sulfur, having a volume-based average particle size measured by laser diffraction particle size distribution measurement of 0.1 ?m to 10 ?m, having a diffraction peak having 2? of 29.0 to 31.0 deg in powder X-ray diffraction measurement using CuK? ray, and an intensity ratio (Ib/Ip) of a peak intensity Ib at a high angle-side low part of the diffraction peak to a peak intensity Ip of the diffraction peak is less than 0.09.

Abstract: A sulfide solid electrolyte may include lithium, phosphorus and sulfur, and the sulfide solid electrolyte may have a diffraction peak A at 2?=25.2±0.5 deg and a diffraction peak B at 29.7±0.5 deg in powder X-ray diffraction using CuK? rays, and a crystallite diameter in a range of from 5 to 20 nm.

Abstract: A sulfide solid electrolyte that contains lithium, phosphorus, sulfur, chlorine and bromine, wherein in powder X-ray diffraction analysis using CuK? rays, it has a diffraction peak A at 2?=25.2±0.5 deg and a diffraction peak B at 2?=29.7±0.5 deg, the diffraction peak A and the diffraction peak B satisfy the following formula (A), and a molar ratio of the chlorine to the phosphorus “c (Cl/P)” and a molar ratio of the bromine to the phosphorus “d (Br/P)” satisfies the following formula (1): 1.2<c+d<1.9??(1) 0.845<SA/SB<1.200??(A) where SA is an area of the diffraction peak A and SB is an area of the diffraction peak B.

Abstract: It is an object of the invention to provide sulfide solid electrolytes having good processability at the time of manufacturing a battery and high ionic conductivity. The present invention relates to a sulfide solid electrolyte containing lithium, phosphorus and sulfur, having a diffraction peak A at 2?=25.2±0.5 deg and a diffraction peak B at 29.7±0.5 deg in powder X-ray diffraction using CuK? rays, and the half-value width of at least one peak obtained by separating the peaks observed in a range of 60 to 120 ppm in solid-state 31P-NMR measurements is 500 to 800 Hz.