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

Patent metadata

Field	Value
Publication number	US-2021280904-A1
Application number	US-202117320799-A
Country	US
Kind code	A1
Filing date	May 14, 2021
Priority date	Dec 27, 2017
Publication date	Sep 9, 2021
Grant date	—

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

1 . A solid electrolyte for all-solid batteries comprising:
a compound represented by the following Formula 1:
Li a PS b N c X d   [Formula 1]

wherein in Formula 1, 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), wherein the compound has an argyrodite-type crystal structure.

2 . The solid electrolyte of claim 1 , wherein the compound is represented by the following Formula 2:
Li 6+a PS 5−a N a X   [Formula 2]
wherein in Formula 2, 0<a≤1; and each X is the same or different halogen atom selected from the group consisting of chlorine (Cl), bromine (Br), and iodine (I).

3 - 5 . (canceled)

6 . 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 .

7 . 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).

8 . The method of claim 7 , wherein the compound is represented by the following Formula 1:
Li a PS b N c X d   [Formula 1]
wherein in Formula 1, 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).

9 . The method of claim 7 , wherein the compound is represented by the following Formula 2:
Li 6+a PS 5−a N a X   [Formula 2]
wherein in Formula 2, 0<a≤1; and each X is the same or different halogen atom selected from the group consisting of chlorine (Cl), bromine (Br), and iodine (I).

10 - 12 . (canceled)

13 . A vehicle comprising an all-solid battery of claim 6 .

Assignees

• Hyundai Motor Co Ltd
• Kia Corp
• Iucf Hyu

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

• H01M10/052

  Li-accumulators · CPC title

• H01M4/62

  Selection of inactive substances as ingredients for active masses, e.g. binders, fillers · CPC title

• C01B25/14

  Sulfur, selenium, or tellurium compounds of phosphorus · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title

• Y02P70/50

  Manufacturing or production processes characterised by the final manufactured product · CPC title