Nitrogen-doped sulfide-based solid electrolyte for all-solid batteries

Patent metadata

Field	Value
Publication number	US-11637313-B2
Application number	US-202117320903-A
Country	US
Kind code	B2
Filing date	May 14, 2021
Priority date	Dec 27, 2017
Publication date	Apr 25, 2023
Grant date	Apr 25, 2023

Abstract

The present invention relates to a nitrogen-doped sulfide-based solid electrolyte for all-solid batteries. The a nitrogen-doped sulfide-based solid electrolyte for all-solid batteries includes a compound with an argyrodite-type crystal structure represented by the following Formula 1:

Li a PS b N c X d   [Formula 1]
wherein 6≤a≤7, 3<b<6, 0<c≤1, 0<d≤2, and each X is the same or different halogen atom selected from the group consisting of chlorine (Cl), bromine (Br), and iodine (I).

First claim

What is claimed is:

1. A solid electrolyte for all-solid batteries comprising:
a compound represented by the following Formula 4:
Li 7 PS 6−2c N c X c   [Formula 4]

wherein in Formula 4, 0<c≤1; and
each X is the same or different halogen atom selected from the group consisting of chlorine (Cl), bromine (Br), and iodine (I),
wherein the compound has an argyrodite-type crystal structure.

2. An all-solid battery comprising:
a cathode;
an anode; and
a solid electrolyte layer interposed between the cathode and the anode,
wherein at least one of the cathode, the anode and the solid electrolyte layer comprises a solid electrolyte of claim 1 .

3. A method of manufacturing a solid electrolyte for all-solid batteries comprising:
providing a mixture of Li 2 S, P 2 S 5 , LiX and Li 3 N;
grinding the mixture; and
heat-treating the mixture to obtain a compound having an argyrodite-type crystal structure, wherein each X is the same or different halogen atom selected from the group consisting of chlorine (Cl), bromine (Br), and iodine (I),
wherein the compound is represented by the following Formula 4:
Li 7 PS 6−2c N c X c   [Formula 4]

wherein in Formula 4.0<c≤1; and
each X is the same or different halogen atom selected from the group consisting of chlorine (Cl), bromine (Br), and iodine (I).

4. A vehicle comprising an all-solid battery of claim 2 .

Assignees

• Hyundai Motor Co Ltd
• Kia Corp
• Iucf Hyu
• Univ Hanyang Ind Univ Coop Found

Inventors

• Seong Ju Yeong
• Jang Yong Jun
• Min Hong Seok
• Kim Sa Heum
• Yoon Yong Sub
• Oh Pil Gun
• Shin Dong Wook
• Park Chan Hwi
• Son Jin Oh

Classifications

• C04B35/547

  based on sulfides or selenides {or tellurides} · CPC title

• C01P2002/72

  by d-values or two theta-values, e.g. as X-ray diagram · CPC title

• C04B2235/76

  Crystal structural characteristics, e.g. symmetry · CPC title

• C01P2006/40

  Electric properties · CPC title

• C01B25/10 Primary

  Halides or oxyhalides of phosphorus · CPC title