Solid electrolyte for all solid-state battery and all solid-state battery including same

Patent metadata

Field	Value
Publication number	US-2025183363-A1
Application number	US-202418925229-A
Country	US
Kind code	A1
Filing date	Oct 24, 2024
Priority date	Nov 30, 2023
Publication date	Jun 5, 2025
Grant date	—

Abstract

A solid electrolyte for an all solid-state battery and an all solid-state battery including the solid electrolyte for an all solid-state battery, the solid electrolyte for an all solid-state battery includes zirconium (Zr), the Zr being included in an amount of about 100 ppm to about 1,000 ppm; and an argyrodite compound.

First claim

What is claimed is:

1 . A solid electrolyte for an all solid-state battery, the solid electrolyte comprising:
zirconium (Zr), the Zr being included in an amount of about 100 ppm to about 1,000 ppm; and an argyrodite compound.

2 . The solid electrolyte for an all solid-state battery as claimed in claim 1 , wherein:
the argyrodite compound is represented by Chemical Formula 1,
Li a M b S c P d X e   [Chemical Formula 1]

in Chemical Formula 1,
a, b, c, d, and e are each independently 0 or more and about 12 or less,
M is Ge, Sn, Si, Ag, Cu, or a combination thereof, and
X is F, Cl, Br, or I.

3 . The solid electrolyte for an all solid-state battery as claimed in claim 1 , wherein the Zr is in the form of a Zr metal, a Zr alloy, Li 2 O—ZrO 2 , Li 2 ZrO 3 , or a combination thereof.

4 . The solid electrolyte for an all solid-state battery as claimed in claim 1 , wherein the amount of the Zr is about 100 ppm to about 700 ppm.

5 . The solid electrolyte for an all solid-state battery as claimed in claim 2 , wherein a is about 4 to about 8.

6 . The solid electrolyte for an all solid-state battery as claimed in claim 2 , wherein b is about 0 to about 0.5.

7 . The solid electrolyte for an all solid-state battery as claimed in claim 2 , wherein c is about 4 to about 6.

8 . The solid electrolyte for an all solid-state battery as claimed in claim 2 , wherein d is about 0.1 to about 2.

9 . The solid electrolyte for an all solid-state battery as claimed in claim 2 , wherein e is about 0.1 to about 2.

10 . The solid electrolyte for an all solid-state battery as claimed in claim 2 , wherein the M is Cu, Sn, or a combination thereof.

11 . The solid electrolyte for an all solid-state battery as claimed in claim 2 , wherein X is Cl, Br, or a combination thereof.

12 . The solid electrolyte for an all solid-state battery as claimed in claim 1 ,
wherein the argyrodite compound includes Li 6 PS 5 Cl, Li 6 PS 5 Br, Li 5.8 PS 4.8 C 11.2 , Li 6.2 PS 5.2 Br 0.8 , Li 6 PS 5 I, Li 5.75 PS 4.75 Cl 1.25 , (Li 5.69 Cu 0.06 ) PS 4.75 Cl 1.25 , (Li 5.72 Cu 0.03 ) PS 4.75 Cl 1.25 , (Li 5.69 Cu 0.06 )P(S 4.70 (SO 4 ) 0.05 )Cl 1.25 , (Li 5.69 Cu 0.06 )P(S 4.60 (SO 4 ) 0.15 )Cl 1.25 , (Li 5.72 Cu 0.03 )P(S 4.725 (SO 4 ) 0.025 )Cl 1.25 , (Li 5.72 Na 0.03 )P(S 4.725 (SO 4 ) 0.025 )Cl 1.25 , Li 5.75 P(S 4.725 (SO 4 ) 0.025 )Cl 1.25 , or a combination thereof.

13 . The solid electrolyte for an all solid-state battery as claimed in claim 1 , wherein the solid electrolyte has an ionic conductivity of about 1 mS/cm to about 10 mS/cm at a temperature of 20° C. to 27° C.

14 . The solid electrolyte for an all solid-state battery as claimed in claim 1 , wherein the solid electrolyte is in the form of particles having an average particle diameter (D 50 ) is about 0.5 μm to about 5 μm.

15 . An all solid-state battery, comprising:
a negative electrode; a positive electrode; and a solid electrolyte layer between the positive electrode and the negative electrode, the solid electrolyte layer including the solid electrolyte of claim 1 .

16 . The all solid-state battery as claimed in claim 15 , wherein the negative electrode includes a metal and a carbon material.

17 . The all solid-state battery as claimed in claim 16 , wherein the metal includes Ag, Zn, Al, Sn, Mg, Ge, Cu, In, Ni, Bi, Au, Si, Pt, Pd, or a combination thereof.

18 . The all solid-state battery as claimed in claim 16 , wherein the carbon material includes crystalline carbon, amorphous carbon, or a combination thereof.

Assignees

• Samsung Sdi Co Ltd

Inventors

• Lee Kyulin
• Song Jayhyok
• Han Jungmin
• Kim Jinkyu

Classifications

• Y02E60/10

  Energy storage using batteries · CPC title

• H01M4/38

  of elements or alloys · CPC title

• H01M4/587 Primary

  for inserting or intercalating light metals · CPC title

• H01M10/0585

  of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators · CPC title

• H01M10/0562 Primary

  Solid materials · CPC title