All-solid state battery and method of manufacturing the same

Patent metadata

Field	Value
Publication number	US-10622616-B2
Application number	US-201615356912-A
Country	US
Kind code	B2
Filing date	Nov 21, 2016
Priority date	May 4, 2016
Publication date	Apr 14, 2020
Grant date	Apr 14, 2020

Abstract

Disclosed are an all-solid state battery and a method of manufacturing the same. The all-solid state battery includes: a current collector comprising an electrode mixture comprising an active material, a conductive material, a binder, and a nano-solid electrolyte; and a composite electrode comprising microcapsules. The electrode mixture is formed in a slurry and the microcapsules are configured to coat the slurry on the current collector.

First claim

What is claimed is:

1. A method of manufacturing an all-solid state battery, the method comprising:
preparing a slurry comprising a nano-solid electrolyte;
preparing a cathode slurry comprising the slurry, a cathode active material, a conductive material, and a binder;
preparing an anode slurry comprising the slurry, an anode active material, the conductive material, and the binder;
impregnating microcapsules containing the slurry inside with a solid electrolyte to form a solid electrolyte layer;
adding other microcapsules to the cathode slurry and the anode slurry to prepare a composite electrode comprising a composite cathode and a composite anode; and
performing a rolling process on the solid electrolyte layer to damage the microcapsules of the solid electrolyte layer for supplying the nano-solid electrolyte in the microcapsules into empty spaces between interfaces of adjacent microcapsules.

2. The method according to claim 1 , wherein the other microcapsule are added in an amount of about 0.1 to 30% based on the weight of the composite electrode to the cathode slurry and the anode slurry to prepare the composite electrode.

3. The method according to claim 2 , wherein the binder is formed in a solid form, and comprises one selected from the group consisting of powder type Super P, rod shaped Denka, and vapor-grown carbon fiber (VGCF).

4. The method according to claim 3 , wherein the binder comprises a polymer compound comprising a fluorine component, diene component, acrylic component, or silicon component.

5. The method according to claim 3 , further comprising injecting a mixture of the cathode or anode active material, the conductive material, the binder, and the nano-solid electrolyte into an organic solvent and mixing thereof to prepare the cathode or anode slurry uniformly dispersed,
wherein the slurry is formed to have a viscosity of about 800 to 1200 cPs for coating the microcapsules.

6. The method according to claim 5 , wherein the organic solvent is an aromatic hydrocarbon based non-polar solvent.

Assignees

• Hyundai Motor Co Ltd

Inventors

• Lee Sang Heon
• Min Hong Seok
• Kwon Oh Min
• Yoon Yong Sub
• Kim Kyung Su

Classifications

• H01M4/623

  fluorinated polymers · CPC title

• H01M10/052

  Li-accumulators · CPC title

• H01M4/133

  Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx · CPC title

• H01M10/0525

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

• H01M10/0562

  Solid materials · CPC title