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US4288508A
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Chalcogenide electrochemical cell
Assignee: University Patents Inc
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Filing: 1979-12-04
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Granted: 1981-09-08
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Expires: 1999-12-04
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
2026-10-29 21:02
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: 14
Claim 1
Independent Claim
102 words
An electrochemical cell in the charge state, said cell having a cathode-active material, an anode-active material and an electrolyte, wherein the cathode-active material is an alkali metal comprising a partially alkali metal intercalated dichalcogenide of the formula A y MZ x wherein A is an alkali metal more electropositive than the anode active material; M is at least one transition metal of Group IV or V; Z is selenium, sulfur or tellurium; y is a numerical value from about 0.01 to about 1; x is a numerical value from about 1.8 to about 2.1; and, the anode-active material is an alkali metal.
Claim 2
Dependent Claim
102 words
An electrochemical cell in the charge state, said cell having a cathode-active material, an anode-active material and an electrolyte, wherein the cathode-active material is an alkali metal comprising a partially alkali metal intercalated dichalcogenide of the formula A y MZ x wherein A is an alkali metal more electropositive than the anode active material; M is at least one transition metal of Group IV or V; Z is selenium, sulfur or tellurium; y is a numerical value from about 0.01 to about 1; x is a numerical value from about 1.8 to about 2.1; and, the anode-active material is an alkali metal.
Claim 3
Dependent Claim
17 words
A cell according to claim 1 wherein A is sodium, M is titanium, and Z is sulfur.
Claim 4
Dependent Claim
17 words
A cell according to claim 1 wherein A is sodium, M is tantalium and Z is sulfur.
Claim 5
Dependent Claim
9 words
A cell according to claim 2 in pellet form.
Claim 6
Dependent Claim
18 words
A cell according to claim 2 wherein y is a numerical value from about 0.15 to about 0.2.
Claim 7
Dependent Claim
99 words
A battery in the charged state, said battery having a cathode-active material, an anode-active material and an electrolyte, wherein the cathode-active material comprises a partially alkali metal intercalated dichalcogenide of the formula A y MZ x wherein A is an alkali metal more electropositive and larger than the anode active material; M is at least one transition metal of Group IV or V; Z is selenium, sulfur or tellurium; y is a numerical value from about 0.01 to about 1; x is a numerical value from about 1.8 to about 2.1 and the anode-active material comprises an alkali metal.
Claim 8
Dependent Claim
99 words
A battery in the charged state, said battery having a cathode-active material, an anode-active material and an electrolyte, wherein the cathode-active material comprises a partially alkali metal intercalated dichalcogenide of the formula A y MZ x wherein A is an alkali metal more electropositive and larger than the anode active material; M is at least one transition metal of Group IV or V; Z is selenium, sulfur or tellurium; y is a numerical value from about 0.01 to about 1; x is a numerical value from about 1.8 to about 2.1 and the anode-active material comprises an alkali metal.
Claim 9
Dependent Claim
103 words
An electrochemical cell in the charge state, said cell having a cathode-active material, an anode-active material and an electrolyte, wherein the cathode-active material is a metal intercalated dichalcogenide of the formula A y MZ x wherein A is a metal selected from the group consisting of Be, Mg, Ba, Ca and Sr and is more electropositive and larger than the anode-active material; M is at least one transition metal of Group IV or V; z is selenium, sulfur or tellurium; y is a numerical value from about 0.01 to about 1; and x is a numerical value from about 1.8 to about 2.1.
Claim 10
Dependent Claim
103 words
An electrochemical cell in the charge state, said cell having a cathode-active material, an anode-active material and an electrolyte, wherein the cathode-active material is a metal intercalated dichalcogenide of the formula A y MZ x wherein A is a metal selected from the group consisting of Be, Mg, Ba, Ca and Sr and is more electropositive and larger than the anode-active material; M is at least one transition metal of Group IV or V; z is selenium, sulfur or tellurium; y is a numerical value from about 0.01 to about 1; and x is a numerical value from about 1.8 to about 2.1.
Claim 11
Dependent Claim
10 words
A cell according to claim 7 wherein A is calcium.
Claim 12
Dependent Claim
10 words
A cell according to claim 7 wherein A is magnesium.
Claim 13
Dependent Claim
10 words
A cell according to claim 7 wherein M is tantalum.
Claim 14
Dependent Claim
10 words
A cell according to claim 7 wherein M is titanium.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-09-07 | 1985-03-09 | 1985-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-09-07 | 1989-03-09 | 1989-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-09-07 | 1993-03-09 | 1993-09-08 | $7700.00 | Window Closed / Lapsed |