Idemitsu Kosan Company, Limited

Hironari Kimpara

Shota Totsuka

Atsushi Sato

Naoya Masuda

Futoshi Utsuno

Atsushi Yao

Minoru Senga

Kota Terai

Hiroyuki Tamura

Hiroaki Yamada

Takayoshi Kambara

Masayuki Shibata

Junpei Maruyama

Toshiaki Tsuno

Katsuhito Kondo

The present invention relates to a method for producing a crystalline solid electrolyte having a small particle diameter and also having a high ionic conductivity and containing a lithium element, a sulfur element, a phosphorus element and a halogen element, the method including a complexing step of mixing a solid electrolyte raw material and a complexing agent in a liquid phase, wherein the method includes a mixing step of obtaining a precursor containing a lithium element, a sulfur element, and a phosphorus element; and a crystallization step of heating the precursor in a solvent using a pressure-resistant container or while refluxing.

Method for producing solid electrolyte

A method of production of a solid electrolyte having an Argyrodite-type crystal structure, including steps of mixing raw materials such that lithium (Li), phosphorus (P), sulfur (S), oxygen (O), and halogen (X) satisfy the following formulas (11) to (14) to obtain a mixture; and heating the mixture:4.8≤Li/P≤5.3  (11)3.8≤S/P≤4.4  (12)0<O/P≤0.8  (13)1.0<X/P≤2.0  (14)

Solid electrolyte and method for producing same

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.

Method for producing sulfide solid electrolyte having argyrodite-type crystal structure

A method of production of a solid electrolyte, which comprises:

A method for producing a solid electrolyte having an argyrodite-type crystal structure, the method comprising:

Method for producing solid electrolyte having argyrodite type crystal structure

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.

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Sodegaura, Japan

Hironari Kimpara