US4042482A
Expired / Lapsed
US
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Substituted lithium orthosilicates and solid electrolytes therefrom
Assignee: EIDP Inc
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Filing: 1976-08-26
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Granted: 1977-08-16
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Expires: 1996-08-26
Abstract
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 x S y O 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 4 SiO 4 crystal structure. These substituted orthosilicates are useful as solid electrolytes in electrochemical cells such as galvanic cells and electrolytic cells.
Inventors
- 👤 Robert Day Shannon
- 👤 Barry Edward Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:10
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/20; C25; C25C; C25C3/00; C25C3/02; H; H01; H01M; H01M10/00; H01M10/05; H01M10/056; H01M10/0561; H01M10/0562; H01M6/00; H01M6/14; H01M6/18; H01M6/185; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
58 words
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 4 SiO 4 crystal structure.
Claim 2
Dependent Claim
58 words
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 4 SiO 4 crystal structure.
Claim 3
Dependent Claim
21 words
The composition of claim 1 wherein w+x+y is no greater than about 0.5 and w-x-2y is no less than about -0.7.
Claim 4
Dependent Claim
75 words
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 w where w is a number from about 0.1 to about 0.45 and x and y are each zero, b. P x where x is a number from about 0.15 to about 0.5 and w and y are each zero, or c. S y where y is a number from about 0.05 to about 0.35 and w and x are each zero.
Claim 5
Dependent Claim
75 words
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 w where w is a number from about 0.1 to about 0.45 and x and y are each zero, b. P x where x is a number from about 0.15 to about 0.5 and w and y are each zero, or c. S y where y is a number from about 0.05 to about 0.35 and w and x are each zero.
Claim 6
Dependent Claim
23 words
The composition of claim 3 having the formula: Li.sub.4.sub.+w Si.sub.1.sub.-w Al.sub.w O.sub.4 where w is a number from about 0.2 to about 0.45.
Claim 7
Dependent Claim
23 words
The composition of claim 3 having the formula: Li.sub.4.sub.-x Si.sub.1.sub.-x P.sub.x O.sub.4 where x is a number from about 0.15 to about 0.5.
Claim 8
Dependent Claim
23 words
The composition of claim 3 having the formula: Li.sub.4.sub.-2y Si.sub.1.sub.-y S.sub.y O.sub.4 where y is a number from about 0.15 to about 0.35.
Claim 9
Dependent Claim
56 words
In an electrochemical device having: a. two electrodes, one of which is lithium metal, LiAl or a LiHg amalgam; b. a solid electrolyte separating the two electrodes; and c. an inert connecting electrode to complete an electrical circuit between the two electrodes; the improvement wherein the solid electrolyte consists essentially of a composition of claim 1.
Claim 10
Dependent Claim
11 words
The device of claim 7 wherein it is an electrolytic cell.
Claim 11
Dependent Claim
11 words
The device of claim 7 wherein it is a galvanic cell.
Claim 12
Dependent Claim
17 words
The device of claim 8 wherein the solid electrolyte consists essentially of the composition of claim 2.
Claim 13
Dependent Claim
17 words
The device of claim 9 wherein the solid electrolyte consists essentially of the composition of claim 2.
Claim 14
Dependent Claim
22 words
The device of claim 8 wherein the solid electrolyte consists essentially of the composition of claim 4, claim 5, or claim 6.
Claim 15
Dependent Claim
22 words
The device of claim 9 wherein the solid electrolyte consists essentially of the composition of claim 4, claim 5, or claim 6.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-08-15 | 1981-02-14 | 1981-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-15 | 1985-02-14 | 1985-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-15 | 1989-02-14 | 1989-08-16 | $7700.00 | Window Closed / Lapsed |