Fabrication method of electrode for all solid cell

Patent metadata

Field	Value
Publication number	US-10411247-B2
Application number	US-201715844934-A
Country	US
Kind code	B2
Filing date	Dec 18, 2017
Priority date	Oct 13, 2017
Publication date	Sep 10, 2019
Grant date	Sep 10, 2019

Abstract

A fabrication method of an electrode for an all solid cell includes: providing a sulfide-based solid electrolyte; forming a coating layer on a surface of the sulfide-based solid electrolyte by heating a nonmetallic oxide at 300 to 700° C.; forming electrode slurry by mixing an electrode active material, the sulfide-based solid electrolyte formed with the coating layer, and a conductive material with a polar solvent; casting the electrode slurry on at least one surface of an electrode current collector; removing the polar solvent by heating the cast electrode slurry at 100 to 300° C.; and removing the coating layer by heating the electrode slurry from which the polar solvent is removed at 300 to 700° C.

First claim

What is claimed is:

1. A fabrication method of an electrode for an all solid cell, comprising:
providing a sulfide-based solid electrolyte;
forming a coating layer on a surface of the sulfide-based solid electrolyte by heating a nonmetallic oxide at 300 to 700° C.;
forming electrode slurry by mixing an electrode active material, the sulfide-based solid electrolyte formed with the coating layer, and a conductive material with a polar solvent;
casting the electrode slurry on at least one surface of an electrode current collector;
removing the polar solvent by heating the cast electrode slurry at 100 to 300° C.; and
removing the coating layer by heating the electrode slurry from which the polar solvent is removed at 300 to 700° C.

2. The fabrication method of claim 1 , wherein in the forming of the coating layer, the nonmetallic oxide has a boiling point of 300° C. to 700° C.

3. The fabrication method of claim 1 , wherein in the forming of the coating layer, at least one of H 3 BO 3 or P 2 O 5 is provided as the nonmetallic oxide.

4. The fabrication method of claim 1 , wherein the forming of the coating layer is performed in an inert gas atmosphere.

5. The fabrication method of claim 1 , wherein in the forming of the electrode slurry, the polar solvent includes at least one of isopropanol, acetonitrile, and acetone.

6. The fabrication method of claim 1 , wherein in the forming of the electrode slurry, the electrode active material includes at least one of lithium cobalt oxide, lithium iron phosphate, nickel cobalt aluminum, and nickel cobalt manganese.

7. The fabrication method of claim 1 , wherein in the forming of the electrode slurry, the conductive material includes at least one of graphite, a spherical carbon material, and a needle-like carbon material.

8. The fabrication method of claim 1 , wherein in the casting of the electrode slurry, the electrode current collector includes at least one of aluminum, nickel, and steel use stainless.

Assignees

• Hyundai Motor Co Ltd
• Kia Motors Corp
• Iucf Hyu

Inventors

• Kwon Oh Min
• Yoon Yong Sub
• Noh Sung Woo
• Choi Sun Ho
• Son Jin Oh
• Shin Dong Wook
• Park Chan Hwi

Classifications

• H01M10/0525

  Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title

• H01M4/38

  of elements or alloys · CPC title

• H01M4/62

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

• H01M4/139 Primary

  Processes of manufacture · CPC title

• H01M4/0471

  involving thermal treatment, e.g. firing, sintering, backing particulate active material, thermal decomposition, pyrolysis · CPC title