Sulfide solid electrolyte material, manufacturing method thereof and battery comprising the same

Patent metadata

Field	Value
Publication number	US-2023238574-A1
Application number	US-202318159073-A
Country	US
Kind code	A1
Filing date	Jan 24, 2023
Priority date	Jan 25, 2022
Publication date	Jul 27, 2023
Grant date	—

Abstract

Disclosed are a solid electrolyte material including a naturally abundant element as a base, having lithium ion conductivity equal or superior to those of conventional sulfide solid electrolyte materials, being relatively inexpensive, and having a crystal structure, a manufacturing method thereof, and a battery using the same. The solid electrolyte material may include a naturally abundant element as a base, have lithium ion conductivity equal or superior to those of conventional sulfide solid electrolyte materials, be relatively inexpensive, and have a crystal structure. The sulfide solid electrolyte material includes a sulfide compound represented by a formula of Li2−4x−ySi1+x−yPyS3, and x and y satisfy conditions −0.040≤x≤0.095 and 0.036≤y≤0.192.

First claim

What is claimed is:

1 . A solid electrolyte material comprising a sulfide compound having a formula of Li 2−4x−y Si 1+x−y P y S 3 ,
wherein x and y satisfy conditions −0.040≤x≤0.095 and 0.036≤y≤0.192.

2 . The solid electrolyte material of claim 1 , wherein the solid electrolyte material has peaks at diffraction angles (2θ) of at least 15.43°±0.50°, 15.62°±0.50°, 19.49°±0.50°, 20.98°±0.50°, 24.94°±0.50°, 26.99°±0.50°, 27.68°±0.50°, 30.47°±0.50°, 31.04°±0.50°, and 39.55°±0.50° through X-ray powder diffraction using Cu k-al radiation having a wavelength of 1.5405 Å in X-rays.

3 . The solid electrolyte material of claim 1 , having ionic conductivity of about 4.0×10 −5 S/cm or greater at a temperature of 25° C.

4 . A method of manufacturing a solid electrolyte material of claim 1 , comprising:
preparing an amorphized ionically conductive material by mechanically milling; and heating the amorphized ionically conductive material.

5 . The method of claim 4 , wherein, in heating the amorphized ionically conductive material, the amorphized ionically conductive material is heated within a temperature range of about 300° C. to 500° C.

6 . A battery comprising a cathode active material layer, comprising:
a cathode active material, an anode active material layer comprising an anode active material, and an electrolyte layer interposed between the cathode active material layer and the anode active material layer, wherein at least one of the cathode active material layer, the anode active material layer and the electrolyte layer comprises the solid electrolyte material of claim 1 .

7 . A vehicle comprising a battery of claim 6 .

Assignees

• Hyundai Motor Co Ltd
• Kia Corp
• Tokyo Institute Of Technology A Japanese National Univ Corp

Inventors

• Yoon Yong Sub
• Yuki Sasaki
• Kim Sa Heum
• Kanno Ryoji
• Satoshi Hori

Classifications

• H01M10/0562 Primary

  Solid materials · CPC title

• H01M4/62

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

• H01M10/052 Primary

  Li-accumulators · CPC title

• C01B25/14

  Sulfur, selenium, or tellurium compounds of phosphorus · CPC title

• H01M2300/0068

  inorganic · CPC title