Solid electrolyte material and solid-state battery made therewith
AssigneeSolid Power Operating, Inc.
InventorsBrian E. Francisco, Heather A. S. Platt, Collin R. Becker, Joshua Buettner-Garrett
Life of this patent
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Abstract
A solid electrolyte material comprises Li, T, X and A wherein T is at least one of P, As, Si, Ge, Al, and B; X is one or more halogens or N; A is one or more of S and Se. The solid electrolyte material has peaks at 17.8°±0.75° and 19.2°±0.75° in X-ray diffraction measurement with Cu-Kα(1,2)=1.5418 Å and may include glass ceramic and/or mixed crystalline phases.
Claims20
A solid electrolyte material comprising a formula:
- Li1-a-b-c-dPaTbAcXd
- wherein 0≤a≤0.129, 0≤b≤0.096, 0.316≤c≤0.484, and 0.012≤d≤0.125, and
- wherein T is at least one element selected from the group consisting of P, As, Si, Ge, Al, and B;
- X is one or more halogens or N;
- A is one or more of S and Se;
- and the solid electrolyte material has peaks at 17.8°±0.75° and 19.2°±0.75° in X-ray diffraction measurement with Cu-Kα(1,2)=1.5418 Å.
A method for producing a sulfide solid electrolyte material including glass ceramics, the sulfide solid electrolyte material comprising a formula:
- Li1-a-b-c-dPaTbAcXd, wherein 0≤a≤0.129, 0≤b≤0.096, 0.316≤c≤0.484, and 0.012≤d≤0.125,
- wherein T is at least one of P, As, Si, Ge, Al, and B;
- X is one or more halogens or N;
- A is one or more of S and Se;
- the method comprising
- mixing and milling a raw material composition containing an element A or compound Li2A, an element T or sulfide of T, and a compound LiX or Li3N to render the mixture amorphous under x-ray diffraction;
- and
- heating the sulfide glass at a heat treatment temperature equal to or greater than a crystallization temperature of the sulfide glass to synthesize the glass ceramics having peaks at 17.8°±0.75° and 19.2°±0.75° in X-ray diffraction measurement with Cu-Kα(1,2)=1.5418 Å.
Dependencies are inferred from the claim text.