SULFIDE-BASED SOLID ELECTROLYTE

• US 20200136179A1
• Filed: 10/24/2019
• Published: 04/30/2020
• Est. Priority Date: 10/29/2018
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: OSADA, Naoki
• Granted Patent: US 11,056,718 B2
• Time in Patent Office: Days
• CPC Class Codes: H01M 10/0525 Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
• CPC Class Codes: H01M 10/054 Accumulators with insertion or intercalation of metals other than lithium, e.g. with magnesium or aluminium
• CPC Class Codes: H01M 10/0562 Solid materials
• CPC Class Codes: H01M 2300/0068 inorganic
• CPC Class Codes: H01M 2300/008 Halides
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

Provided is a sulfide-based solid electrolyte with high lithium ion conductivity. The sulfide-based solid electrolyte may be a sulfide-based solid electrolyte, wherein the sulfide-based solid electrolyte comprises a lithium (Li) element, a phosphorus (P) element, a sulfur (S) element and a halogen element, and it has a LGPS-type crystal structure, and wherein a ratio (P_4d/P_2b) between a proportion (P_4d) of an area of a peak assigned to phosphorus atoms occupying 4d sites in the crystal structure and a proportion (P_2b) of an area of a peak assigned to phosphorus atoms occupying 2b sites in the crystal structure, both of which are peaks observed in a ³¹P-MAS-NMR spectrum of the sulfide-based solid electrolyte, is 1.77 or more and 2.14 or less.

Claims

1. A sulfide-based solid electrolyte,

wherein the sulfide-based solid electrolyte comprises a lithium (Li) element, a phosphorus (P) element, a sulfur (S) element and a halogen element, and it has a LGPS-type crystal structure, and

wherein a ratio (P_4d/P_2b) between a proportion (P_4d) of an area of a peak assigned to phosphorus atoms occupying 4d sites in the crystal structure and a proportion (P_2b) of an area of a peak assigned to phosphorus atoms occupying 2b sites in the crystal structure, both of which are peaks observed in a ³¹P-MAS-NMR spectrum of the sulfide-based solid electrolyte, is 1.77 or more and 2.14 or less.

2. The sulfide-based solid electrolyte according to claim 1, wherein a crystallinity of the sulfide-based solid electrolyte is 70% or more and 82% or less.