Method of synthesis of solid electrolyte, a solid-state electrolyte composition, and an electrochemical cell
A method of synthesizing a solid-state electrolyte where P 2 S 5 , Na 2 S 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.
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 .