Lithium-ion conducting haloboro-oxysulfides

Patent metadata

Field	Value
Publication number	US-12476276-B2
Application number	US-202017620229-A
Country	US
Kind code	B2
Filing date	Jun 16, 2020
Priority date	Jun 17, 2019
Publication date	Nov 18, 2025
Grant date	Nov 18, 2025

Abstract

Described are a solid material which has ionic conductivity for lithium ions, a process for preparing the solid material, a use of the solid material as a solid electrolyte for an electrochemical cell, a solid structure selected from the group consisting of a cathode, an anode and a separator for an electrochemical cell, and an electrochemical cell including the solid structure.

First claim

The invention claimed is:

1 . A solid material having a composition according to general formula (I)
Li 2x+z B 2y M a O b*a S x+3y X z   (I)
wherein M is one or more selected from the group consisting of P, Si, and Sb X is one or more selected from the group consisting of Cl, Br, and I x is in the range of from 0.1 to 0.7 y is in the range of from 0.05 to 0.5 z is in the range of from 0.01 to 0.5 a is in the range of from 0.2 to 0.3 b is in the range of from 1.9 to 2.6 0.995≤x+y+z+a≤1.005.

2 . The solid material according to claim 1 , wherein said solid material having a composition according to general formula (I) is glassy.

3 . The solid material according to claim 1 , wherein M is Si and X is selected from the group consisting of Cl, Br and I.

4 . The solid material according to claim 1 , having a composition according to general formula (Ia)
Li 2x+z B 2y Si a O b*a S x+3y I z   (Ia)
wherein x is in the range of from 0.1 to 0.3 y is in the range of from 0.1 to 0.25 z is in the range of from 0.2 to 0.48 a is in the range of from 0.2 to 0.3 b is in the range of from 1.95 to 2.05 0.995≤x+y+z+a≤1.005.

5 . The solid material according to claim 1 , wherein the solid material has an ionic conductivity of 0.1 mS/cm or more.

6 . The solid material according to claim 1 , wherein the solid material is in the form of a sheet.

7 . A process for preparing a solid material as defined in claim 1 , said process comprising
a) providing the precursors Li 2 S B 2 S 3 or both of boron and sulfur one or more oxides of elements M selected from the group consisting of P, Si, Ge, As and Sb one or more compounds LiX wherein X is selected from the group consisting of halides and pseudohalides b) preparing a mixture comprising the precursors provided in a), wherein in said mixture the molar ratio of the elements Li, S, B, M, O and X matches general formula (I) c) heat-treating the mixture to obtain a melt d) quenching the melt so that a solid material having a composition according to general formula (I) is obtained.

8 . The process according to claim 7 , wherein
the precursors provided in a) are Li 2 S, S, B, SiO 2 and one or more of LiCl, LiBr and LiI and/or in b) mixing is performed by means of mechanical milling and/or in c) heat-treating is performed in a closed vessel and/or in d) quenching is performed by contacting the melt with water, ice, a sub-cooled gas, a metal plate or a chemically inert mold.

9 . The process according to claim 7 , wherein c) comprises
a first stage of heat-treating at a temperature in the range of from 400° C. to 650° C. for a duration of 1 to 13 hours, and a second stage of heat treating at a temperature in the range of from 700° C. to 1000° C. for a duration of from 1 to 40 hours.

10 . The process according to claim 8 , wherein in b) the mixture comprising the precursors is formed into pellets, which are heat-treated in c).

11 . The process according to claim 8 , wherein in b) any handling is performed under a protective gas atmosphere.

12 . The solid material according to claim 1 for use as a solid electrolyte for an electrochemical cell, wherein preferably the solid electrolyte is a component of a solid structure for an electrochemical cell selected from the group consisting of cathode, anode and separator.

13 . A solid structure for an electrochemical cell, wherein said solid structure is selected from the group consisting of cathode, anode and separator, wherein the solid structure comprises a solid material according to claim 1 .

14 . An electrochemical cell comprising a solid material wherein preferably the solid material is a component of a solid structure as defined in claim 13 .

15 . The solid material according to claim 1 , wherein z is in the range of from 0.33 to 0.41.

Assignees

• Basf Se
• Univ Waterloo

Inventors

• Kaup Kavish
• Nazar Linda
• Kulisch Joem
• Wu Xiaohan

Classifications

• H01M2300/008

  Halides · CPC title

• C03C4/14

  for electro-conductive glass · CPC title

• C03C3/11 Primary

  containing halogen or nitrogen · CPC title

• C03C3/064

  containing boron · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title