Inorganic solid electrolytes and efficient methods for making the same

Patent metadata

Field	Value
Publication number	US-2025323315-A1
Application number	US-202519176492-A
Country	US
Kind code	A1
Filing date	Apr 11, 2025
Priority date	Apr 11, 2024
Publication date	Oct 16, 2025
Grant date	—

Abstract

In accordance with the purpose(s) of the present disclosure, as embodied and broadly described herein, the disclosure, in one aspect, relates to inorganic solid electrolytes and synthesis of inorganic solid electrolytes. The electrolytes have the general formula A z N v S 1-y O y X 5 , exhibit superionic conductivity, and can be produced via a relatively fast synthesis route. The electrolytes can be a component of different types of batteries.

First claim

1 . A compound having the formula A z N v S 1-y O y X 5 , wherein
A is Li, Na, K, or any combination thereof; N is Ta, Nb, or any combination thereof; X is Cl, Br, I, or any combination thereof; z is greater than zero to about 2; y is greater than or equal to zero to less than 1; and the sum (z+5v) is equal to 7.

2 . The compound of claim 1 , wherein A is Li or Na.

3 . The compound of claim 1 , wherein z is about 1.0 to about 2.0.

4 . The compound of claim 1 , wherein N is Ta.

5 . The compound of claim 1 , wherein v is about 1.00 to about 1.50.

6 . The compound of claim 1 , wherein y is from about 0.01 to about 0.99.

7 . The compound of claim 1 , wherein X is Cl or Br.

8 . The compound of claim 1 , wherein the compound is Li 2 TaS 1-y O y Cl 5 .

9 . The compound of claim 8 , wherein y is from about 0.10 to about 0.99.

10 . The compound of claim 1 , wherein the compound is Li 2 TaS 0.1 O 0.9 Cl 5 , Li 2 TaS 0.4 O 0.6 Cl 5 , or Li 2 TaS 0.7 O 0.3 Cl 5 .

11 . The compound of claim 1 , wherein the compound has an ionic conductivity of at least about 1.00 mS/cm to about 10.00 mS/cm.

12 . The compound of claim 1 , wherein the compound has an electronic conductivity of about 1.00×10 −8 S/cm to about 1.00×10 −10 S/cm.

13 . The compound of claim 1 , wherein the compound exhibits superionic conductivity over a temperature range of about 0° C. to about 80° C.

14 . The compound of claim 1 , wherein the compound has an activation energy for ion transport of from about 0.1 eV to about 0.5 eV.

15 . A method for making a compound having the formula A z N v S 1-y O y X 5 , wherein
A is Li, Na, K, or any combination thereof; N is Ta, Nb, or any combination thereof; X is Cl, Br, I, or any combination thereof; 1 z is greater than zero to about 2; y is greater than or equal to zero to less than 1; and the sum (z+5v) is equal to 7; the method comprising:
(a) combining in the solid state the following components: (i) A 2 S, selected from the group consisting of Li 2 S, Na 2 S, K 2 S, and any combination thereof; (ii) A 2 O, selected from the group consisting of Li 2 O, Na 2 O, K 2 O, and any combination thereof; and (iii) NX 5 , selected from the group consisting of TaCl 5 , TaBr 5 , Tal 5 , NbCl 5 , NbBr 5 , Nbl 5 , and any combination thereof, to produce a precursor mixture; and
(b) mixing the precursor mixture by mechanochemical milling.

16 . The method of claim 15 , wherein precursor mixture is mixed by mechanochemical milling for about 1 hour to about 4 hours, wherein the components are substantially anhydrous and mixed in an inert atmosphere.

17 . The method of claim 15 , wherein the components are combined in stoichiometric amounts.

18 . A compound produced by the method of claim 15 .

19 . A battery comprising the compound of claim 1 .

20 . A sensor for ion detection, comprising the compound of claim 1 .

Assignees

• Univ Florida State Res Found

Inventors

• Hu yan-yan
• Ogbolu Bright
• Dikella Gamaralalage Thilina Nadeemali Dikella

Classifications

• H01M10/0525

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

• H01M2300/008

  Halides · CPC title

• C01B33/08

  Compounds containing halogen · CPC title

• H01M10/052

  Li-accumulators · CPC title

• G01N27/333

  Ion-selective electrodes or membranes (glass electrodes G01N27/36) · CPC title