All-solid state battery and method of manufacturing the same

Patent metadata

Field	Value
Publication number	US-2017324076-A1
Application number	US-201615356912-A
Country	US
Kind code	A1
Filing date	Nov 21, 2016
Priority date	May 4, 2016
Publication date	Nov 9, 2017
Grant date	—

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 . An all-solid state battery comprising:
a current collector comprising an electrode mixture, the electrode mixture comprising an active material, a conductive material, a binder, and a nano-solid electrolyte; and a composite electrode comprising microcapsules, the microcapsules containing the slurry and configured to coat the slurry on the current collector.

2 . The all-solid state battery according to claim 1 , wherein the electrode mixture is formed in a slurry.

3 . The all-solid state battery according to claim 2 , wherein the microcapsule comprises a first microcapsule comprising a cathode active material, the conductive material, the binder, and the slurry and a second microcapsule comprising an anode active material, the conductive material, the binder, and the slurry, and
the composite electrode includes a composite cathode coated with the first microcapsule and a composite anode coated with the second microcapsule.

4 . The all-solid state battery according to claim 1 , wherein the microcapsules comprise a solid electrolyte layer that comprises a conductive polymer material and forms an outer layer of the microcapsules.

5 . The all-solid battery according to claim 2 , wherein the slurry is formed in a gel-type or a solid and is present inside of the microcapsules.

6 . The all-solid state battery according to claim 4 , wherein in the microcapsule, the solid electrolyte layer is ruptured at a predetermined temperature, such that the nano-solid electrolyte from the slurry inside the microcapsule fills empty spaces in an electrode.

7 . The all-solid state battery according to claim 3 , wherein a diameter ratio of the microcapsule to active materials of the composite cathode or the composite anode is about 1:1 to 10:1.

8 . The all-solid state battery according to claim 1 , wherein a diameter of the nano-solid electrolyte is about 1 to 20 μm.

9 . The all-solid state battery according to claim 3 , wherein the anode active material comprises natural graphite, artificial graphite, soft carbon, or hard carbon.

10 . A method of manufacturing an all-solid state battery of claim 1 , the method comprising:
impregnating the microcapsule with a solid electrolyte; preparing a slurry comprising the active material, the conductive material, the binder, and the nano-solid electrolyte; adding the microcapsules to the prepared slurry; and performing a rolling process for supplying the nano-solid electrolyte in the microcapsules into empty spaces generated between interfaces of the microcapsules.

11 . The method according to claim 10 , wherein the microcapsule is added in an amount of about 0.1 to 30% based on the weight of the composite electrode.

12 . The method according to claim 11 , 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).

13 . The method according to claim 12 , wherein the binder comprises a polymer compound comprising a fluorine component, diene component, acrylic component, or silicon component.

14 . The method according to claim 12 , further comprising injecting a mixture of the active material, the conductive material, the binder, and the nano-solid electrolyte into an organic solvent and mixing thereof to prepare the slurry uniformly dispersed,
wherein the slurry is formed to have a viscosity of about 800 to 1200 cPs for coating the microcapsules.

15 . The method according to claim 14 , wherein the organic solvent is an aromatic hydrocarbon based non-polar solvent.

16 . A vehicle comprising an all-solid state battery of claim 1 .

Assignees

• Hyundai Motor Co Ltd

Inventors

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

Classifications

• H01M4/133

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

• H01M4/583

  Carbonaceous material, e.g. graphite-intercalation compounds or CFx · CPC title

• H01M10/058

  Construction or manufacture · CPC title

• H01M2004/021

  Physical characteristics, e.g. porosity, surface area · CPC title

• H01M4/0407 Primary

  by coating on an electrolyte layer · CPC title