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US4206276A
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Chalcogenide electrochemical cell
Assignee: University Patents Inc
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Filing: 1978-09-18
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Granted: 1980-06-03
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Expires: 1998-09-18
Abstract
Abstract A battery is provided in which the anode contains an alkali metal in a high state of thermodynamic activity; the cathode comprises a partially alkali metal-intercalated chalcogenide of the formula A y MZ x wherein A is an alkali metal more electropositive and larger than the anode alkali metal, M is a transition metal of Group IV or V, x is a numerical value of from about 1.8 to about 2.1, y is a numerical value of from about 0.01 to about 1 and Z is sulfur, selenium or tellurium; and the electrolyte comprises ions of the anode metal in a medium which is compatible with the anode and cathode allowing transport of the ion from anode to intercalate into the cathode. In the discharged state the battery includes a cathode characterized by the presence of A' z A y MZ x in which A' is alkali metal more electronegative than A and z is a numerical value in the range 0<z≦3.25.
Inventors
- 👤 Samarnath Basu
- 👤 Wayne L. Worrell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:13
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/36; H01M4/00; H01M4/02; H01M4/36; H01M4/58; H01M4/581; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
92 words
A cathode of an electrochemical cell in the discharged state, comprising a mixed alkali metal intercalated dichalcogenide of the formula A' z A y MZ x wherein: A and A' are each alkali metals with A being more electropositive and larger than A'; M is at least one transition metal from Group IV or V; Z is sulfur, selenium or tellurium; x is a numerical value from about 1.8 to about 2.1; y is a numerical value from about 0.01 to 1; and z is a numerical value in the range 0<z≦3.25.
Claim 2
Dependent Claim
92 words
A cathode of an electrochemical cell in the discharged state, comprising a mixed alkali metal intercalated dichalcogenide of the formula A' z A y MZ x wherein: A and A' are each alkali metals with A being more electropositive and larger than A'; M is at least one transition metal from Group IV or V; Z is sulfur, selenium or tellurium; x is a numerical value from about 1.8 to about 2.1; y is a numerical value from about 0.01 to 1; and z is a numerical value in the range 0<z≦3.25.
Claim 3
Dependent Claim
10 words
A cathode according to claim 1 wherein A' is lithium.
Claim 4
Dependent Claim
10 words
A cathode according to claim 1 wherein A is sodium.
Claim 5
Dependent Claim
14 words
A cathode according to claim 1 wherein A is sodium and A' is lithium.
Claim 6
Dependent Claim
10 words
A cathode according to claim 4 wherein Z is sulfur.
Claim 7
Dependent Claim
10 words
A cathode according to claim 5 wherein M is tantalum.
Claim 8
Dependent Claim
10 words
A cathode according to claim 5 wherein M is titanium.
Claim 9
Dependent Claim
77 words
A composition of the formula A y A' z M.Z x wherein A and A' are each alkali metals with A being more electropositive and larger than A'; M is at least one transition metal from Group IV or V; Z is sulfur, selenium or tellurium; x is a numerical value from about 1.8 to about 2.1; y is a numerical value from about 0.01 to 1; and z is a numerical value in the range 0<z≦3.25.
Claim 10
Dependent Claim
77 words
A composition of the formula A y A' z M.Z x wherein A and A' are each alkali metals with A being more electropositive and larger than A'; M is at least one transition metal from Group IV or V; Z is sulfur, selenium or tellurium; x is a numerical value from about 1.8 to about 2.1; y is a numerical value from about 0.01 to 1; and z is a numerical value in the range 0<z≦3.25.
Claim 11
Dependent Claim
10 words
A composition according to claim 8 wherein A is sodium.
Claim 12
Dependent Claim
10 words
A composition according to claim 8 wherein A' is lithium.
Claim 13
Dependent Claim
14 words
A composition according to claim 8 wherein A is sodium and A' is lithium.
Claim 14
Dependent Claim
10 words
A composition according to claim 8 wherein Z is sulfur.
Claim 15
Dependent Claim
10 words
A composition according to claim 8 wherein M is tantalum.
Claim 16
Dependent Claim
10 words
A composition according to claim 8 wherein M is titanium.
Claim 17
Dependent Claim
25 words
A composition of the formula Na 0 .177 Li z TiS 2 wherein z is a numerical value from about 10- 3 to about 3.25.
Claim 18
Dependent Claim
25 words
A composition of the formula Na 0 .177 Li z TiS 2 wherein z is a numerical value from about 10- 3 to about 3.25.
Claim 19
Dependent Claim
114 words
A battery in the discharged state wherein the cathode comprises a mixed alkali metal intercalated dichalcogenide of the formula A' z A y MZ x wherein A and A' are each alkali metals with A being more electropositive and larger than A'; M is at least one transition metal from Group IV or V; Z is sulfur, selenium or tellurium; x is a numerical value from about 1.8 to about 2.1; y is a numerical value from about 0.01 to 1; and z is a numerical value in the range 0<z≦3.25 and said battery further including an electrolyte comprising a salt of A' so that on battery charging A' forms as the anode-active material.
Claim 20
Dependent Claim
114 words
A battery in the discharged state wherein the cathode comprises a mixed alkali metal intercalated dichalcogenide of the formula A' z A y MZ x wherein A and A' are each alkali metals with A being more electropositive and larger than A'; M is at least one transition metal from Group IV or V; Z is sulfur, selenium or tellurium; x is a numerical value from about 1.8 to about 2.1; y is a numerical value from about 0.01 to 1; and z is a numerical value in the range 0<z≦3.25 and said battery further including an electrolyte comprising a salt of A' so that on battery charging A' forms as the anode-active material.
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) | 1983-06-03 | 1983-12-03 | 1984-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-06-03 | 1987-12-03 | 1988-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-06-03 | 1991-12-03 | 1992-06-03 | $7700.00 | Window Closed / Lapsed |