Solid Power Operating, Inc.

Sean P Culver

Ilya Lisenker

Brian E Francisco

Benjamin Carlson

Ilya Iisenker

A method of synthesizing a solid-state electrolyte where PS, NaS 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.

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

A solid electrolyte material comprises Li, T, X and A wherein T is at least one of Sb, P, As, Si, Ge, Al, and B; X is one or more halogens or N; A is one or more of S or Se. The solid electrolyte material has peaks at 2θ=14.5°±0.50°, 16.8°±0.50°, 23.9°±0.50°, 28.1°±0.50°, and 32.5°±0.50 in X-ray diffraction measurement with Cu-Kα(1,2)=1.54064 Å and may include glass ceramic and/or mixed crystalline phases.

Solid electrolyte material and solid-state battery made therewith

A process for producing a low-cost water-reactive metal sulfide material includes dissolving a substantially anhydrous alkali metal salt and a substantially anhydrous sulfide compound in a substantially anhydrous polar solvent, providing differential solubility for a substantially high solubility alkali metal sulfide and a substantially low solubility by-product, and forming a mixture of the high solubility alkali metal sulfide and the low solubility by-product; separating the low solubility by-product from the mixture to isolate the supernatant including the alkali metal sulfide, and separating the polar solvent from the alkali metal sulfide to produce the alkali metal sulfide. The present invention provides a scalable process for production of a high purity alkali metal sulfide that is essentially free of undesired by-products.

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Broomfield, CO, United States of America

Sean P Culver