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

Patent metadata

Field	Value
Publication number	US-11588177-B2
Application number	US-202117140763-A
Country	US
Kind code	B2
Filing date	Jan 4, 2021
Priority date	Nov 25, 2020
Publication date	Feb 21, 2023
Grant date	Feb 21, 2023

Abstract

A solid-state ion conductor includes a compound of Formula 1:Li6+(5−a)x−b*y−z(c+2)wA1−x(M1)ax(M2)byO5−z−wX1+zQcw  Formula 1wherein, in Formula 1, A is an element having an oxidation state of +5, M1 is an element having an oxidation state of a, wherein a is +2, +3, +4, +6, +7, or a combination thereof, M2 is an element having an oxidation state of b, wherein b is +1, +2, or a combination thereof, X is an element having an oxidation state of −1, Q is an element having an oxidation state of c, wherein c is less than −2, and wherein −2≤(5−a)x−b*y−z−(c+2)w≤2, 0≤x≤0.5, 0≤y≤0.5, −1≤z≤1, 0≤w≤0.5.

First claim

What is claimed is:

1. A solid-state ion conductor comprising a compound of Formula 1:
Li 6+(5−a)x−b*y−z(c+2)w A 1−x (M1) a x (M2) b y O 5−z−w X 1+z Q c w   Formula 1

wherein, in Formula 1,
A is an element having an oxidation state of +5,
M1 is an element having an oxidation state of a, wherein a is +2, +3, +4, +6, +7, or a combination thereof,
M2 is an element having an oxidation state of b, wherein b is +1, +2, or a combination thereof,
X is an element having an oxidation state of −1,
Q is an element having an oxidation state of c, wherein c is less than −2, a wherein −2≤( 5 −a)x−b*y−z−(c+2)w≤2, 0≤x≤0.5, 0≤y≤0.5, −1≤z≤1, 0≤w≤0.5, and
wherein when z=0, at least one of x, y, and w does not equal 0.

2. The solid-state ion conductor of claim 1 , wherein A comprises an element of Group 15, or a combination thereof.

3. The solid-state ion conductor of claim 1 , wherein A comprises P, As, Sb, or a combination thereof.

4. The solid-state ion conductor of claim 1 , wherein M1 comprises an element of Groups 2 to 4, an element of Groups 6 to 17, or a combination thereof.

5. The solid-state ion conductor of claim 4 , wherein M1 is Mg, Ca, Sr, Sc, Y, Ti, Zr, Hf, Cr, Mo, Mn, Re, Fe, Co, Ni, Cu, Zn, Al, Ga, In, Si, Ge, Sn, P, As, Sb, Bi, S, Se, Cl, Br, I, or a combination thereof.

6. The solid-state ion conductor of claim 1 , wherein M2 comprises an element of Group 1, Group 2, Group 10, Group 11, Group 12, or a combination thereof.

7. The solid-state ion conductor of claim 6 , wherein M2 is Na, K, Cs, Mg, Ca, Sr, Ba, Ni, Cu, Ag, Zn, or a combination thereof.

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

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

10. The solid-state ion conductor of claim 1 , wherein Q is a Group 15 element or a combination thereof.

11. The solid-state ion conductor of claim 10 , wherein Q is N.

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

13. The solid-state ion conductor of claim 12 , having an ionic conductivity of 1×10 −6 to 1×10 −2 Siemens per centimeter at room temperature.

14. The solid-state ion conductor of claim 1 , further comprising Li 3 OX, wherein X is as defined in claim 1 .

15. The solid-state ion conductor of claim 14 , comprising
the solid-state ion conductor of claim 1 , wherein the compound has an ionic conductivity of 1×10 −6 to 1×10 −2 Siemens per centimeter at room temperature, and
Li 3 OBr or Li 3 OCl.

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

17. The component of claim 16 , wherein the solid-state ion conductor is in a form of a layer on the current collector.

18. A negative electrode comprising:
a negative active material comprising lithium metal, a lithium metal alloy, or combination thereof; and
the solid-state ion conductor of claim 1 on the negative active material.

19. 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.

20. 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, the negative electrode and the electrolyte comprise the solid-state ion conductor of claim 1 .

21. The electrochemical cell of claim 20 ,
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.

22. The electrochemical cell of claim 21 , wherein the solid-state ion conductor is directly on the negative electrode.

23. 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 +5, a compound comprising an element having an oxidation state of +2, +3, +4, +6, +7, or a combination thereof, a compound comprising an element having an oxidations state of +1, +2, or a combination thereof, a compound comprising an element having an oxidation state of −1, and a compound comprising an element having an oxidation state of less than −2 to provide a mixture; and
heat-treating the mixture to prepare the compound.

24. A method of manufacturing an electrochemical cell, the method comprising:
providing a negative electrode comprising lithium, a lithium alloy, or combination thereof;
disposing the compound of claim 1 on the negative electrode;
disposing an electrolyte on the negative electrode; and
disposing a positive 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
• Ouyang Bin
• Sun Yingzhi

Classifications

• Y02E60/10

  Energy storage using batteries · CPC title

• H01M10/058

  Construction or manufacture · CPC title

• H01M2300/008

  Halides · CPC title

• H01M50/431

  Inorganic material · CPC title

• C01B25/455

  containing halogen {(completely halogenated alkali metal phosphates C01D, e.g. lithium hexafluorophosphate C01D15/005)} · CPC title