Method of synthesis of solid electrolyte, a solid-state electrolyte composition, and an electrochemical cell

Patent metadata

Field	Value
Publication number	US-12159971-B2
Application number	US-202117643745-A
Country	US
Kind code	B2
Filing date	Dec 10, 2021
Priority date	Dec 11, 2020
Publication date	Dec 3, 2024
Grant date	Dec 3, 2024

Abstract

A method of synthesizing a solid-state electrolyte where P2S5, Na2S and LiCl are dissolved in one of more solvents; where upon reacting of the mixture, NaCl precipitates out and is removed from the solution; the solvent is removed; and the sulfide solid-state electrolyte is dried, then crystalized to be used in a solid-state battery. A solid-state battery comprising the produced sulfide solid-state electrolyte is also described.

First claim

What is claimed:

1. A method of synthesizing a solid-state electrolyte, comprising:
dissolving a phosphorous containing compound and at least one a first alkali metal material in a first solvent to form a first solution;
dissolving a second alkali metal material in a second solvent to form a second solution;
mixing the first solution and the second solution to create a combined solution wherein a metathesis reaction occurs in the combined solution between the first alkali metal material and the second alkali metal material to produce a solid-state electrolyte and a third alkali metal material;
precipitating the third alkali metal material to form a precipitated alkali metal material in the combined solution;
removing the precipitated alkali metal material from the combined solution;
removing the first solvent and the second solvent from the combined solution to recover an isolated solid-state electrolyte.

2. The method as recited in claim 1 further including processing the isolated solid-state electrolyte material via at least one of drying, milling, particle size reducing, and crystalizing the isolated solid-state electrolyte.

3. The method as recited in claim 1 wherein the first solvent, the second solvent, or both include at least one of an ether, an ester, a nitrile, a ketone, tetrahydrofuran, or acetonitrile.

4. The method as recited in claim 1 further comprising providing an additional solvent to the combined solution, the additional solvent comprising an alcohol comprising methanol, ethanol, propanol, or butanol.

5. The method as recited in claim 3 further comprising adding a non-reactive hydrocarbon solvent in any of the solutions.

6. The method as recited in claim 1 wherein one or both of the first alkali metal material and the second alkali metal material comprises Na 2 S, K 2 S, Rb 2 S, Cs 2 S, NaHS, KHS, RbHS, CsHS, LiF, LiBr, LiI, Li 2 SO 4 , Li 2 CO 3 , LiOH, or LiNO 3 .

7. The method as recited in claim 1 wherein one or both of the first alkali metal materials and the second alkali metal material are partially substituted for Li 2 S or LiHS.

8. A method of synthesizing a solid-state electrolyte, comprising:
dissolving a phosphorous containing compound and at least one first alkali metal material in one or more solvents to form a first solution;
dissolving at least one second alkali metal material in the first solution to form a second solution;

mixing the second solution wherein a metathesis reaction occurs between the at least one first alkali metal material and the at least one second alkali metal material to produce a solid-state electrolyte and one or more third alkali metal materials;
precipitating the one or more third alkali metal materials to form a precipitated alkali metal material in the second solution;
removing the precipitated alkali metal material from the second solution; and removing the one or more solvents from the second solution to recover an isolated solid-state electrolyte.

9. The method as recited in claim 8 wherein one or both of the first alkali metal material and the second alkali metal material comprises Na 2 S, K 2 S, Rb 2 S, Cs 2 S, NaHS, KHS, RbHS, CSHS, LIF, LiBr, LiI, Li 2 SO 4 , Li 2 CO 3 , LiOH, or LiNO 3 and wherein the one or more solvents includes at least one of an ether, an ester, a nitrile, a ketone, tetrahydrofuran, an alcohol or acetonitrile.

10. A solid-state electrolyte synthesized by the method of claim 1 .

11. A solid-state electrolyte synthesized by the method of claim 8 .

12. A lithium-based electrochemical cell comprising a solid-state electrolyte synthesized by the method of claim 1 .

13. A lithium-based electrochemical cell comprising a solid-state electrolyte synthesized by the method of claim 8 .

Assignees

• Solid Power Inc
• Solid Power Operating Inc

Inventors

• Carlson Benjamin
• Culver Sean P
• Iisenker Ilya

Classifications

• H01M2300/0068

  inorganic · CPC title

• H01M10/0525 Primary

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

• C01P2002/72

  by d-values or two theta-values, e.g. as X-ray diagram · CPC title

• C01B25/14

  Sulfur, selenium, or tellurium compounds of phosphorus · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title