SULFIDE-BASED SOLID ELECTROLYTE, METHOD FOR PREPARING SULFIDE-BASED SOLID ELECTROLYTE, AND ALL-SOLID-STATE BATTERY INCLUDING SULFIDE-BASED SOLID ELECTROLYTE

• Main Authors: MATSUBARA, Keiko, NARIMATSU, Eiichiro, IKENOMOTO, Shun
• Format: Patent
• Language: English; French; Korean
• Published: 29.08.2024
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The objective of the present invention is to provide: a sulfide-based solid electrolyte having improved ionic conductivity; a method for preparing the sulfide-based solid electrolyte; and an all-solid-state battery including the sulfide-based solid electrolyte. The present invention provides a sulfide-based solid electrolyte containing a Group 13 element and having an argyrodite-type crystal structure, the sulfide-based solid electrolyte being represented by chemical formula Li7-x-2yMyPS6-xHax, where M is at least one element selected from the Group 13 elements, Ha is at least one element selected from the halogen elements and comprises Br, 0＜x＜2.5, and 0＜y＜0.2. Le but de la présente invention est de fournir : un électrolyte solide à base de sulfure ayant une conductivité ionique améliorée ; un procédé pour la préparation de l'électrolyte solide à base de sulfure ; et une batterie tout solide comprenant l'électrolyte solide à base de sulfure. La présente invention concerne un électrolyte solide à base de sulfure contenant un élément du groupe 13 et ayant une structure cristalline de type argyrodite, l'électrolyte solide à base de sulfure étant représenté par la formule chimique Li7-x-2yMyPS6-xHax, où M est au moins un élément choisi parmi les éléments du groupe 13, Ha est au moins un élément choisi parmi les éléments halogènes et comprend Br, 0＜x＜2,5, et 0＜y＜0,2. 이온 전도율이 향상된 황화물계 고체 전해질, 황화물계 고체 전해질의 제조 방법, 및 황화물계 고체 전해질을 포함하는 전고체 전지를 제공하는 것을 목적으로 한다. 본 발명은, 제13족 원소를 포함하고, 아지로다이트형 결정 구조를 갖는 황화물계 고체 전해질로서, 상기 황화물계 고체 전해질이 화학식 Li7-x-3yMyPS6-xHax로 표시되고, 상기 화학식에서, 상기 M이 제13족 원소로부터 선택되는 1종 이상의 원소이고, 상기 Ha가 할로겐 원소로부터 선택되는 1종 이상의 원소이고, 상기 Ha가 Br을 포함하고, 0＜x＜2.5, 0＜y＜0.2를 만족하는, 황화물계 고체 전해질을 제공한다.