Solid-state electrolyte, solid-state battery including the electrolyte, and method of making the same

Patent metadata

Field	Value
Publication number	US-11600855-B2
Application number	US-202117140248-A
Country	US
Kind code	B2
Filing date	Jan 4, 2021
Priority date	Nov 25, 2020
Publication date	Mar 7, 2023
Grant date	Mar 7, 2023

Abstract

A solid-state ion conductor includes a compound of Formula 1:Li(6-a)x+2y-b*z-6A1−xMaxOyXbz  Formula 1wherein, in Formula 1, A is an element having an oxidation state of +6, M is an element having an oxidation state of a, wherein a is +2, +3, +4, +5, or a combination thereof, X is an element having an oxidation state of b, wherein b is −1, −3, or a combination thereof, and 2<[(6−a)x+2y−b*z−6]≤6.5, 0≤x≤1, y>0, and z≥0.

First claim

What is claimed is:

1. A solid-state ion conductor comprising a compound of Formula 1:
Li (6-a)x+2y-b*z-6 A 1−x M a x O y X b z   Formula 1

wherein, in Formula 1,
A is an element having an oxidation state of +6,
M is Mg, Ca, Sr, Sc, Y, Zr, Hf, V, Nb, Ta, Cr, Mo, Re, Fe, Co, Ni, Cu, Zn, Al, Ga, In, Si, Ge, Sn, P, As, Sb, S, Se, Cl, Br, I, or a combination thereof,
X is a group having an oxidation state of b, wherein b is −1, −3, or a combination thereof, and
2<[(6−a)x+2y−b*z−6]≤6.5, 0≤x<1, y>0, and z≥0.

2. The solid-state ion conductor of claim 1 , wherein A comprises an element of Group 6, Group 8, Group 16, or a combination thereof.

3. The solid-state ion conductor of claim 2 , wherein A is Cr, Mo, W, Fe, S, Se, Te, or a combination thereof.

4. The solid-state ion conductor of claim 1 , wherein A is Te.

5. The solid-state ion conductor of claim 1 , wherein M comprises an element of Groups 2 to 17, or a combination thereof.

6. The solid-state ion conductor of claim 1 , wherein M is Sb, Nb, or a combination thereof.

7. The solid-state ion conductor of claim 1 , wherein X comprises an element of Group 15, an element of Group 17, a cluster anion, or a combination thereof.

8. The solid-state ion conductor of claim 1 , wherein X comprises N, F, Cl, Br, BH 4 − , BF 4 − , AlH 4 − , NH 2 − , OH − , SH − , or a combination thereof.

9. The solid-state ion conductor of claim 1 , having an ionic conductivity of greater than 1×10 −7 Siemens per centimeter at room temperature.

10. The solid-state ion conductor of claim 9 , having an ionic conductivity of 1×10 −6 to 1×10 −2 Siemens per centimeter at room temperature.

11. A component for a lithium secondary electrochemical cell comprising:
a current collector; and
the solid-state ion conductor of claim 1 on the current collector.

12. The component of claim 11 , wherein the solid-state ion conductor is in a form of a layer on the current collector.

13. A positive electrode comprising:
a positive electrode active material; and
the solid-state ion conductor of claim 1 on the positive electrode active material.

14. A separator for a lithium battery comprising:
a substrate; and
the solid-state ion conductor of claim 1 disposed on a surface of the substrate.

15. An electrochemical cell comprising:
a positive electrode;
a negative electrode; and
an electrolyte between the positive electrode and the negative electrode, wherein at least one of the positive electrode and the electrolyte comprises the solid-state ion conductor of claim 1 .

16. The electrochemical cell of claim 15 ,
wherein the negative electrode comprises lithium metal, a lithium metal alloy, or combination thereof, and
wherein the solid-state ion conductor is between the positive electrode and the negative electrode.

17. The electrochemical cell of claim 16 , wherein the solid-state ion conductor is directly on the positive electrode.

18. A method of preparing the compound of claim 1 , the method comprising:
contacting a lithium compound, a compound comprising an element having an oxidation state of +6, a compound comprising an element having an oxidation state of +2, +3, +4, +5, or a combination thereof, and a compound comprising an element having an oxidation state of −1, −3, or a combination thereof to provide a mixture; and
treating the mixture to prepare the compound.

19. The method of claim 18 , wherein treating the mixture comprises mechanochemical milling of the mixture to prepare a compound of Formula 1.

20. The method of claim 18 , wherein the treating is heat-treating the mixture at 25° C. to 800° C. to prepare the compound of Formula 1.

21. The method of claim 20 , wherein the heat-treating comprises heating from 300° C. to 700° C. under flowing oxygen.

22. A method of manufacturing an electrochemical cell, the method comprising:
providing a positive electrode;
disposing the solid-state ion conductor of claim 1 on the positive electrode;
disposing an electrolyte on the positive electrode; and
disposing a negative electrode on the electrolyte to manufacture the electrochemical cell.

Assignees

• Samsung Electronics Co Ltd
• Univ California

Inventors

• Wang Yan
• Miara Lincoln
• Xiao Yihan
• Ceder Gerbrand

Classifications

• H01M10/0525

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

• H01M10/052

  Li-accumulators · CPC title

• H01M4/13

  Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof · CPC title

• H01M10/0562 Primary

  Solid materials · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title