Sodium/lithium phosphorothioates as novel solid-state electrolyte for sodium/lithium battery
AssigneeTrustees of Dartmouth College
InventorsChuanlong Wang, Yiwen Zhang, Weiyang Li
Life of this patent
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Abstract
The disclosure relates to solid-phase and molten metal phosphorothioates useful as electrolytes, batteries comprising solid-phase and molten metal phosphorothioates, and methods of making solid-phase and molten metal phosphorothioates.
Claims20
A solid-phase or molten electrolyte comprising an mP2S5-nNa2Sx complex, wherein the molar ratio of P2S5 to Na2Sx (m:n) is between 1:2 and 2:1 and x is an integer from 1 to 12.
A solid-state battery comprising a cathode, an anode, and a solid-state electrolyte in contact with the cathode and the anode, wherein the cathode and/or anode comprise:
- an active material;
- optionally a conductive additive;
- and
- a solid-state qP2S5-rNa2Sx complex, wherein:
- the molar ratio of P2S5 to Na2Sx (q:r) is between 1:2 and 2:1;
- and
- x is an integer from 1 to 12;
- and wherein the solid-state electrolyte comprises a solid-phase mP2S5-nNa2Sx complex, wherein the molar ratio of P2S5 to Na2Sx (m:n) is between 1:2 and 2:1 and wherein x is an integer from 1 to 12.
A method of manufacturing a solid-phase electrolyte comprising an mP2S5-nNa2Sx complex, wherein the method comprises:
- mixing sodium sulfide (Na2S), phosphorus pentasulfide (P2S5), and sulfur powder (S) in an organic solvent to form a solvated mP2S5-nNa2Sx complex;
- and
- exposing the solvated mP2S5-nNa2Sx complex to less-than-atmospheric pressure to precipitate a solid-phase mP2S5-nNa2Sx complex;
- wherein the molar ratio of P2S5 to Na2Sx (m:n) is between 1:2 and 2:1 and x is an integer from 1 to 12.
Dependencies are inferred from the claim text.