Idemitsu Kosan Company, Limited

Japan Science and Technology Agency

Kota Terai

Futoshi Utsuno

Masaru Nakagawa

Takashi Umeki

Hiroshi Yamaguchi

Atsushi Sato

Koki Yano

Kazuyoshi Inoue

Hirokazu Kawashima

Masashi Kasami

Shigekazu Tomai

Toshiaki Tsuno

Hidetsugu Ikeda

Masashi Kawasaki

Hiroaki Nakamura

Hideomi Koinuma

Masatoshi Saito

Shigeo Matsuzaki

Hirofumi Kondo

Kazuaki Ebata

Hironari Kimpara

Yoichi Ikeda

Naoki Kurihara

Akiko Nakata

Tomoteru Fukumura

A sulfide solid electrolyte that contains lithium, phosphorus, sulfur, chlorine and bromine, wherein in powder X-ray diffraction analysis using CuKα rays, it has a diffraction peak A at 2θ=25.2±0.5 deg and a diffraction peak B at 2θ=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<<1.9  (1)0.845<<1.200  (A)

Sulfide solid electrolyte

A sulfide solid electrolyte may include lithium, phosphorus and sulfur, and the sulfide solid electrolyte may have a diffraction peak A at 2&#x3b8;=25.2&#xb1;0.5 deg and a diffraction peak B at 29.7&#xb1;0.5 deg in powder X-ray diffraction using CuK&#x3b1; rays, and a crystallite diameter in a range of from 5 to 20 nm.

A sulfide solid electrolyte containing the following (A) and (B):

A sulfide solid electrolyte that contains lithium, phosphorus, sulfur, chlorine and bromine, wherein in powder X-ray diffraction analysis using CuK&#x3b1; rays, it has a diffraction peak A at 2&#x3b8;=25.2&#xb1;0.5 deg and a diffraction peak B at 2&#x3b8;=29.7&#xb1;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&#x3c;&#x3c;1.9&#x2003;&#x2003;(1)0.845&#x3c;&#x3c;1.200&#x2003;&#x2003;(A)

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 &#x212b; or less.

A sulfide solid electrolyte comprising lithium, phosphorus and sulfur, wherein the sulfide solid electrolyte has a diffraction peak A at 2&#x3b8;=25.2&#xb1;0.5 deg and a diffraction peak B at 29.7&#xb1;0.5 deg in powder X-ray diffraction using CuK&#x3b1; rays, an area ratio of a peak derived from PSglass to the total area of peaks derived from glass observed in solidP-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 solidP-NMR measurement is 1% or more and 45% or less.

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 &#x3bc;m to 10 &#x3bc;m, having a diffraction peak having 2&#x3b8; of 29.0 to 31.0 deg in powder X-ray diffraction measurement using CuK&#x3b1; 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.

Sulfide solid electrolyte particles

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&#x3b8;=25.2&#xb1;0.5 deg and a diffraction peak B at 29.7&#xb1;0.5 deg in powder X-ray diffraction using CuK&#x3b1; 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-stateP-NMR measurements is 500 to 800 Hz.

A sulfide solid electrolyte that contains lithium, phosphorus, sulfur, chlorine and bromine, wherein in powder X-ray diffraction analysis using CuK&#x3b1; rays, it has a diffraction peak A at 2&#x3b8;=25.2&#xb1;0.5 deg and a diffraction peek B at 2&#x3b8;=29.7&#xb1;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&#x3c;&#x3c;1.9&#x2003;&#x2003;(1)0.845&#x3c;&#x3c;1.200&#x2003;&#x2003;(A)

A sulfide solid electrolyte containing lithium, phosphorus, sulfur; and one or more of elements X selected from the group consisting of halogen elements and chalcogen elements excluding sulfur, wherein the sulfide solid electrolyte includes an argyrodite-type crystal structure, and wherein a molar ratio of the lithium to the phosphorus, a (Li/P), a molar ratio of the sulfur to the phosphorus, b (S/P), and a molar ratio of the element X to the phosphorus, c (X/P), satisfy formulas (1) to (3): 5.0&#x2264;a&#x2264;7.1 (1) 1.0&#x3c;a&#x2212;b&#x2264;1.5 (2) 6.5&#x2264;a+c&#x3c;7.1 (3) wherein b&#x3e;0 and c&#x3e;0 are satisfied.

Aimed at providing a sulfide solid electrolyte comprising an argyrodite type crystal structure, having a high ionic conductivity due to presence of a large amount of a halogen element and is capable of suppressing agglomeration at the time of production. Provided is a sulfide solid electrolyte comprising lithium, phosphorus, sulfur and one or more elements X selected from halogen elements, wherein the sulfide solid electrolyte comprises an argyrodite type crystal structure, and wherein a molar ratio of the lithium to the phosphorus 'a (Li/P)', a molar ratio of the sulfur to the phosphorus 'b (S/P)' and a molar ratio of the element X to the phosphorus &#x201c;c (X/P)&#x201d; satisfy the following formulas (1) to (3):5.0&#x2264;&#x3c;7.3&#x2003;&#x2003;(1)0.70&#x2264;&#x3c;1.0&#x2003;&#x2003;(2)7.0&#x3c;&#x2264;7.3&#x2003;&#x2003;(3)provided that b&#x3e;0 and c&#x3e;0.

Sulfide solid electrolyte with argyrodite type crystal structure

A sulfide solid electrolyte containing lithium, phosphorus, sulfur, and two or more of elements X selected from halogen elements, where the sulfide solid electrolyte includes an argyrodite-type crystal structure, and a molar ratio of the sulfur to the phosphorus 'b (S/P)' and a molar ratio of the element X to the phosphorus 'c (X/P)' satisfy the following formula (1):0.23&#x3c;0.57&#x2003;&#x2003;(1).

An oxide sintered body includes indium oxide and gallium solid-solved therein, the oxide sintered body having an atomic ratio 'Ga/(Ga+In)' of 0.001 to 0.12, containing indium and gallium in an amount of 80 atom % or more based on total metal atoms, and having an InObixbyite structure.

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Sodegaura, Japan

Kota Terai