Electrode layer and all-solid state battery

Patent metadata

Field	Value
Publication number	US-2023231122-A1
Application number	US-202217976456-A
Country	US
Kind code	A1
Filing date	Oct 28, 2022
Priority date	Jan 17, 2022
Publication date	Jul 20, 2023
Grant date	—

Abstract

There is provided an electrode layer for an all-solid state battery, which contains an electrode active material and a sulfide solid electrolyte, where the sulfide solid electrolyte has an average particle diameter of less than 1 µm and the electrode layer contains an imidazoline-based dispersion material.

First claim

What is claimed is:

1 . An electrode layer for an all-solid state battery, the electrode layers comprising:
an electrode active material; and a sulfide solid electrolyte, wherein:
the sulfide solid electrolyte has an average particle diameter of less than 1 µm; and
the electrode layer contains an imidazoline-based dispersion material.

2 . The electrode layer according to claim 1 , wherein the electrode layer further contains a rubber-based binder.

3 . The electrode layer according to claim 1 , wherein the electrode active material contains at least one of a transition metal oxide-based active material, a Si-based active material, and a carbon-based active material.

4 . The electrode layer according to claim 1 , wherein the electrode layer is a positive electrode layer.

5 . The electrode layer according to claim 1 , wherein the electrode layer is a negative electrode layer.

6 . The electrode layer according to claim 1 , wherein in the electrode layer, a content of the imidazoline-based dispersion material is 0.005 parts by weight or more and 0.5 parts by weight or less in a case where a content of the electrode active material is set to 100 parts by weight.

7 . The electrode layer according to claim 6 , wherein the electrode layer is a positive electrode layer, and the content of the imidazoline-based dispersion material is 0.01 parts by weight or more and 0.135 parts by weight or less.

8 . The electrode layer according to claim 1 , wherein:
the electrode layer further contains a binder; and a distance calculated from Hansen solubility parameters of the sulfide solid electrolyte and the imidazoline-based dispersion material is smaller than a distance calculated from Hansen solubility parameters of the sulfide solid electrolyte and the binder.

9 . The electrode layer according to claim 1 , wherein:
the electrode layer further contains a binder; and a distance calculated from Hansen solubility parameters of the electrode active material and the imidazoline-based dispersion material is smaller than a distance calculated from Hansen solubility parameters of the electrode active material and the binder.

10 . An all-solid state battery comprising:
a positive electrode layer; a negative electrode layer; and a solid electrolyte layer arranged between the positive electrode layer and the negative electrode layer, wherein at least one of the positive electrode layer and the negative electrode layer is the electrode layer according to claim 1 .

Assignees

• Toyota Motor Co Ltd

Inventors

• Mitsui Akio
• Sugita Yasunari
• Nagao Kenji
• Sasaki Izuru
• Tsutsui Yasutaka
• Tamura Takaaki
• Kamitake Hiroki

Classifications

• H01M4/485 Primary

  of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy (H01M4/505, H01M4/525 take precedence) · CPC title

• H01M4/48

  of inorganic oxides or hydroxides · CPC title

• H01M4/386

  Silicon or alloys based on silicon · CPC title

• H01M4/587

  for inserting or intercalating light metals · CPC title

• H01M4/622

  being polymers · CPC title