Method of predicting lithium ion conductivity of solid electrolyte

Patent metadata

Field	Value
Publication number	US-2023207867-A1
Application number	US-202217964424-A
Country	US
Kind code	A1
Filing date	Oct 12, 2022
Priority date	Dec 24, 2021
Publication date	Jun 29, 2023
Grant date	—

Abstract

Disclosed is a method of predicting the lithium ion conductivity of a solid electrolyte having a specific composition.

First claim

What is claimed is:

1 . A method of a predicting lithium ion conductivity value of a solid electrolyte, comprising:
obtaining a calculated value σ calc by calculating a lithium ion conductivity of a solid electrolyte; and obtaining a predicted value σ pre of the lithium ion conductivity of the solid electrolyte from the calculated value σ calc using Equation 1:
σ pre =σ calc ·χ c 7.14   [Equation 1]

in Equation 1, χ c represents the crystallinity of the solid electrolyte.

2 . The method according to claim 1 , wherein the solid electrolyte is represented by Chemical Formula 1,
Li 6-a PS 5-a X a   [Chemical Formula 1]
where 1≤a≤2, and X is a halogen selected from as chlorine (Cl), bromine (Br), and iodine (I).

3 . The method according to claim 1 , wherein the crystallinity is in a range of about 0.7 to 0.8.

4 . The method according to claim 1 , wherein Equation 1 is obtained by the steps of:
obtaining the calculated value σ calc of the lithium ion conductivity of each of a plurality of solid electrolytes; obtaining an actual lithium ion conductivity σ exp of each of the plurality of solid electrolytes after synthesizing the solid electrolytes; obtaining a degree of crystallinity χ c of each of the synthesized solid electrolytes; and performing regression analysis on the crystallinities χ e , the actual lithium ion conductivities σ exp , and the calculated values σ calc .

5 . A solid electrolyte comprising a compound of Chemical Formula 1,
Li 6-a PS 5-a χ a   [Chemical Formula 1]
where 1≤a≤2, and X is a halogen selected from as chlorine (Cl), bromine (Br), and iodine (I), wherein a crystallinity of the solid electrolyte satisfies the Equation 1:
σ pre =σ calc ·χ c 7.14   [Equation 1]

wherein σ calc is a calculated value by calculating a lithium ion conductivity of a solid electrolyte; χ c 7.14 is the crystallinity of the solid electrolyte; and σ pre is a predicted value of the lithium ion conductivity of the solid electrolyte from the calculated value σ calc using Equation 1.

6 . An all-solid-state battery comprising a solid electrolyte of claim 5 .

Assignees

• Hyundai Motor Co Ltd
• Kia Corp
• Iucf Hyu Erica Campus

Inventors

• Seong Ju Yeong
• Song In Woo
• Lee Sang Heon
• Noh Sung Woo
• Park Je Sik
• Seo Jeong Hyun
• Jang Yong Jun
• Ha A Reum
• Lee Sang Uck
• Jun Byeong Sun

Classifications

• H01M2300/008

  Halides · CPC title

• H01M10/0562 Primary

  Solid materials · CPC title

• H01M10/052

  Li-accumulators · CPC title

• H01M10/0525

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

• H01M2300/0068

  inorganic · CPC title