Idemitsu Kosan Company, Limited

Yusuke Iseki

Hiroaki Yamada

Nobuhito Nakaya

Minoru Senga

Masayuki Shibata

Koji Kato

Takashi Hayakawa

Shogo Shimada

Tomoyuki Okuyama

Shinji Tanaka

Masao Aida

Naoya Masuda

Atsushi Yao

Fumio Yamakawa

Takashi Nakagawa

Akito Takashima

Takehiro Fujita

Toyohiko Iwai

A solid electrolyte includes a lithium element, a sulfur element, a phosphorus element, and a halogen element. The solid electrolyte does not include PSstructure, and the solid electrolyte has diffraction peaks at around 2θ=20.2° and 23.6° in the X-ray diffraction pattern using a CuKα ray.

Solid electrolyte containing a thio-lisicon region II crystal structure

A sulfide solid electrolyte, which is able to adjust the morphology unavailable traditionally, or is readily adjusted so as to have a desired morphology, the sulfide solid electrolyte having a volume-based average particle diameter measured by laser diffraction particle size distribution measurement of 3 μm or more and a specific surface area measured by the BET method of 20 m/g or more; and a method of treating a sulfide solid electrolyte including the sulfide solid electrolyte being subjected to at least one mechanical treatment selected from disintegration and granulation.

Sulfide solid electrolyte and treatment method therefor

[Problem] To provide a method for efficiently producing a sulfide solid electrolyte using a liquid-phase method. [Solution to Problem] A method for producing a sulfide solid electrolyte not using a pulverizer in reacting raw materials, wherein a raw material that contains lithium sulfide, a phosphorus compound and a halogen compound, and a complexing agent are stirred in a reactor while a fluid that contains the contents in the reactor is discharged outside the reactor through a discharging port arranged in the reactor and the fluid that contains the discharged contents is returned back to the reactor through a returning port arranged in the reactor to thereby make the contents-containing fluid circulate therethrough.

Method for producing sulfide solid electrolyte

Provided is a method for producing a sulfide solid electrolyte having a high purity as side reaction hardly occurs, and having a high ionic conductivity, in a simplified manner. The method is for producing a sulfide solid electrolyte containing a lithium atom, a sulfur atom, a phosphorus atom and a halogen atom, comprising separately preparing a complex (1) containing a sulfide that contains a lithium atom, a sulfur atom and a phosphorus atom, as a constituent element, and a complex (2) containing a halide that contains a lithium atom and a halogen atom, as a constituent element, and mixing the complex (1) and the complex (2).

Disclosed is a method for producing a sulfide solid electrolyte including a step of processing a slurry by at least one treatment selected from drying and heating, wherein a solid electrolyte raw material containing a lithium element, a sulfur element, a phosphorus element and a halogen element, and a complexing agent are mixed in a reactor to give a complex slurry containing a complex formed of the solid electrolyte raw material and the complexing agent, and the complex slurry is transferred into an intermediate tank equipped with a cooling device and cooled therein.

A sulfide solid electrolyte, which is able to adjust the morphology unavailable traditionally, or is readily adjusted so as to have a desired morphology, the sulfide solid electrolyte having a volume-based average particle diameter measured by laser diffraction particle size distribution measurement of 3 &#x3bc;m or more and a specific surface area measured by the BET method of 20 m2/g or more; and a method of treating a sulfide solid electrolyte including the sulfide solid electrolyte being subjected to at least one mechanical treatment selected from disintegration and granulation.

A method of producing a solid electrolyte having a high ionic conductivity, which adopts a liquid-phase method and suppresses the generation of hydrogen sulfide, wherein a raw material inclusion containing a lithium element, a sulfur element, a phosphorus element, and a halogen element is mixed with a complexing agent containing a compound having at least two tertiary amino groups; and an electrolyte precursor constituted of a lithium element, a sulfur element, a phosphorus element, a halogen element, and a complexing agent containing a compound having at least two tertiary amino groups.

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Chiba, Japan

Yusuke Iseki