All solid-state battery and method of preparing same

Patent metadata

Field	Value
Publication number	US-2025201911-A1
Application number	US-202418935801-A
Country	US
Kind code	A1
Filing date	Nov 4, 2024
Priority date	Dec 14, 2023
Publication date	Jun 19, 2025
Grant date	—

Abstract

An all solid-state battery includes a negative electrode; a positive electrode; and a solid electrolyte layer between the negative electrode and the positive electrode, wherein the solid electrolyte layer includes a first solid electrolyte layer in contact with the negative electrode, and a second solid electrolyte layer in contact with the positive electrode, the first solid electrolyte layer is an irregular layer and includes an alcohol.

First claim

What is claimed is:

1 . An all solid-state battery, comprising:
a negative electrode; a positive electrode; and a solid electrolyte layer between the negative electrode and the positive electrode, wherein: the solid electrolyte layer includes:
a first solid electrolyte layer in contact with the negative electrode, and
a second solid electrolyte layer in contact with the positive electrode,
the first solid electrolyte layer is an irregular layer and includes an alcohol.

2 . The all solid-state battery as claimed in claim 1 , wherein the first solid electrolyte layer is a dense layer.

3 . The all solid-state battery as claimed in claim 1 , wherein the first solid electrolyte layer includes the alcohol in an amount of about 0.08 wt % to about 0.13 wt %, based on a total weight of the first solid electrolyte layer.

4 . The all solid-state battery as claimed in claim 1 , wherein:
the first solid electrolyte layer includes a first solid electrolyte, and the first solid electrolyte includes a sulfide solid electrolyte.

5 . The all solid-state battery as claimed in claim 1 , wherein:
the second solid electrolyte layer includes a second solid electrolyte, and the second solid electrolyte includes a sulfide solid electrolyte, an oxide solid electrolyte, a halide solid electrolyte, or a solid polymer electrolyte.

6 . The all solid-state battery as claimed in claim 1 , wherein:
the negative electrode includes a negative electrode current collector and a negative electrode coating layer on the negative electrode current collector, and the negative electrode coating layer includes a metal, a carbon material, and a binder.

7 . The all solid-state battery as claimed in claim 6 , wherein the carbon material includes amorphous carbon, crystalline carbon, or a mixture thereof.

8 . The all solid-state battery as claimed in claim 6 , wherein the metal includes Ag, Au, Sn, Zn, Al, Mg, Ge, Cu, In, Ni, Bi, Pt, Pd, or a combination thereof.

9 . The all solid-state battery as claimed in claim 1 , wherein the alcohol includes ethanol, propanol, isopropanol, butanol, t-butanol, or a combination thereof.

10 . The all solid-state battery as claimed in claim 1 , wherein the first solid electrolyte layer has a thickness of about 10 μm to about 200 μm.

11 . The all solid-state battery as claimed in claim 1 , wherein the second solid electrolyte layer has a thickness of about 10 μm to about 200 μm.

12 . The all solid-state battery as claimed in claim 1 , wherein the second solid electrolyte layer includes a large-particle solid electrolyte having a particle diameter of more than about 0.1 μm.

13 . The all solid-state battery as claimed in claim 12 , wherein the large-particle solid electrolyte has a particle diameter of about 0.5 μm to about 20 μm.

14 . A method of preparing an all solid-state battery, the method comprising:
coating a first solid electrolyte layer composition having a viscosity of about 5 cPs to about 1,000 cPs at 25° C. on a negative electrode and drying to prepare a first solid electrolyte layer; positioning a second solid electrolyte layer and a positive electrode on the first solid electrolyte layer to prepare a laminate, and pressurizing the laminate.

15 . The method of preparing the all solid-state battery as claimed in claim 14 , wherein the first solid electrolyte layer composition includes a first solid electrolyte and an alcohol.

16 . The method of preparing the all solid-state battery as claimed in claim 15 , wherein the alcohol includes ethanol, propanol, isopropanol, butanol, t-butanol, or a combination thereof.

17 . The method of preparing the all solid-state battery as claimed in claim 14 , wherein the first solid electrolyte layer composition includes a first solid electrolyte in an amount of about 1 wt % to about 20 wt %, based a total weight of the first solid electrolyte layer composition.

Assignees

• Samsung Sdi Co Ltd

Inventors

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

Classifications

• Y02E60/10

  Energy storage using batteries · CPC title

• H01M2300/0094

  in the form of layered products, e.g. coatings · CPC title

• H01M2300/0068

  inorganic · CPC title

• H01M2004/027

  Negative electrodes · CPC title

• H01M4/134

  Electrodes based on metals, Si or alloys · CPC title