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US 4,042,482 AGranted
Substituted lithium orthosilicates and solid electrolytes therefrom
AssigneeE. I. Du Pont de Nemours and Company
InventorsRobert Day Shannon, Barry Edward Taylor
Life of this patent
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Abstract
Substituted lithium orthosilicates are provided having A. the formula Li.sub.4.sub.+w.sub.-x.sub.-2y Si.sub.1.sub.-w.sub.-x.sub.-y Al.sub.w P.sub.x S.sub.y O.sub.4 wherein W IS 0 TO ABOUT 0.45, X IS 0 TO ABOUT 0.5, AND Y IS 0 TO ABOUT 0.35, With the proviso that one or both of w or x+2y is at least about 0.1, and B. the monoclinic Li.sub.4 SiO.sub.4 crystal structure. These substituted orthosilicates are useful as solid electrolytes in electrochemical cells such as galvanic cells and electrolytic cells.
Claims13
A composition having
- a. the formula
- Li.sub.4.sub.+w.sub.-x.sub.-2y Si.sub.1.sub.-w.sub.-x.sub.-y Al.sub.w P.sub.x S.sub.y O.sub.4
- wherein
- w is 0 to about 0.45,
- x is 0 to about 0.5, and
- y is 0 to about 0.35,
- with the proviso that one or both of w or x+2y is at least about 0.1, and
- b. the monoclinic Li.sub.4 SiO.sub.4 crystal structure.
5 more elements
A composition having the formula:
- Li.sub.4.sub.+w.sub.-x.sub.-2y Si.sub.1.sub.-w.sub.-x.sub.-y MO.sub.4
- wherein M is
- a. Al.sub.w where w is a number from about 0.1 to about 0.45 and x and y are each zero,
- b. P.sub.x where x is a number from about 0.15 to about 0.5 and w and y are each zero, or
- c. S.sub.y where y is a number from about 0.05 to about 0.35 and w and x are each zero.
2 more elements
Dependencies are inferred from the claim text.