All-solid battery

Patent metadata

Field	Value
Publication number	US-2019198916-A1
Application number	US-201816163174-A
Country	US
Kind code	A1
Filing date	Oct 17, 2018
Priority date	Dec 27, 2017
Publication date	Jun 27, 2019
Grant date	—

Abstract

Disclosed is an all-solid battery, including a cathode, an anode, and a solid electrolyte layer. The solid electrolyte layer may include a first solid electrolyte having an ionic conductivity ranging from greater than about 5×10 −3 S/cm to about 1×10 −1 S/cm and a second solid electrolyte having an ionic conductivity ranging from greater than about 5×10 −4 S/cm to about 1×10 −2 S/cm.

First claim

What is claimed is:

1 . An all-solid battery, comprising:
a cathode; an anode; and a solid electrolyte layer disposed between the cathode and the anode, wherein the solid electrolyte layer comprises a first solid electrolyte having an ionic conductivity ranging from greater than about 5×10 −3 S/cm to about 1×10 −1 S/cm and a second solid electrolyte having an ionic conductivity ranging from greater than about 5×10 −4 S/cm to about 1×10 −2 S/cm.

2 . The all-solid battery of claim 1 , wherein the first solid electrolyte is at least one crystalline sulfide solid electrolyte selected from the group consisting of Li—Ge—P—S, Li—Si—P—S—Cl, Li—P—S—Cl, Li—P—S—Br and Li—P—S—Br—Cl.

3 . The all-solid battery of claim 1 , wherein the second solid electrolyte is at least one amorphous sulfide solid electrolyte selected from the group consisting of LiILi 2 S—P 2 S 5 , LiI—Li 2 S—B 2 S 3 , Li 3 PO 4 —Li 2 S—Si 2 S, Li 3 PO 4 —Li 2 S—SiS 2 , LiPO 4 —Li 2 S—SiS, LiI—Li 2 S—P 2 O 5 , LiI—Li 3 PO 4 —P 2 S 5 , Li 3 PS 4 , and Li 2 S—P 2 S 5 .

4 . The all-solid battery of claim 1 , wherein a particle size of the second solid electrolyte is less than a particle size of the first solid electrolyte.

5 . The all-solid battery of claim 4 , wherein the first solid electrolyte has a particle size of about 5 to 20 μm.

6 . The all-solid battery of claim 4 , wherein the second solid electrolyte has a particle size of about 0.5 to 4 μm.

7 . The all-solid battery of claim 1 , wherein a weight ratio of the first solid electrolyte to the second solid electrolyte is about 50:50 to 90:10.

8 . The all-solid battery of claim 1 , wherein the cathode comprises the first solid electrolyte, the second solid electrolyte and a cathode active material.

9 . The all-solid battery of claim 8 , wherein the cathode active material is at least one selected from the group consisting of lithium cobalt oxide, lithium iron phosphate, nickel cobalt aluminum, and nickel cobalt manganese.

10 . The all-solid battery of claim 1 , wherein the anode comprises the first solid electrolyte, the second solid electrolyte, and an anode active material.

11 . The all-solid battery of claim 10 , wherein the anode active material is at least one selected from the group consisting of graphitizable carbon (soft carbon), non-graphitizable carbon (hard carbon), natural graphite, artificial graphite, silicon (Si) and tin (Sn).

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

Assignees

• Hyundai Motor Co Ltd
• Kia Motors Corp

Inventors

• Yoon Yong Sub
• Kim Yun Sung
• Oh Pil Gun
• Min Hong Seok
• Kwon Oh Min

Classifications

• H01M2220/20

  Batteries in motive systems, e.g. vehicle, ship, plane · 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 Primary

  Solid materials · CPC title

• H01M4/387

  Tin or alloys based on tin · CPC title

• H01M4/366

  as layered products · CPC title