US3877988A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lithium-metal telluride organic electrolyte cell
Assignee: Duracell Inc USA
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Filing: 1973-03-21
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Granted: 1975-04-15
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Expires: 1993-03-21
Abstract
Abstract This invention relates to novel primary electric cells (with extremely flat discharge curves) comprising positive electrodes composed of metal tellurides wherein the metals are selected from the group consisting of silver, copper, iron, cobalt, nickel, mercury, thallium, lead, bismuth and the mixtures thereof, and the negative electrodes composed of light metals, said electrodes being disposed in an electrolyte comprising an organic solvent selected from the group consisting of tetrahydrofuran, Nnitrosodimethylamine, dimethyl sulfite, propylene carbonate, gamma-butyrolactone, acetonitrile, dimethyl sulfoxide, dimethyl formamide, and mixtures thereof, and having dissolved therein soluble salts of the metals, for example, the perchlorates, hexafluorophosphates, tetrafluoroborates, tetrachloroaluminates, hexafluoroarsenates of lithium.
Inventors
- 👤 Arabinda N Dey
- 👤 Per Bro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:18
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/36; H01M4/58; H01M4/581; H01M6/00; H01M6/14; H01M6/16
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
118 words
A HIGH ENERGY DENSITY CELL COMPRISING A POSITIVE ELECTRODE SELECTED FROM THE GROUP CONSISTING OF THE TELLURIDES OF SILVER, COPPER, IRON, COBALT, NICKEL, MERCURY, THALLIUM, LEAD, AND BISMUTH AND THE MIXTURES THEREOF; A NEGATIVE ELECTRODE COMPRISING A LIGHT METAL SELECTED FROM THE GROUP CONSISTING OF LI, NA, K, BE, MG, CA AND AL, SAID ELECTRODES BEING DISPOSED IN AN ELECTROLYTE COMPRISING AN ORGANIC SOLVENT SELECTED FROM THE GROUP CONISTING OF TETRAHYDROFURAN, N-NITROSODIMETHYLAMINE, DIMETHYL SULFITE, PROPYLENE CARBONATE, GAMMA-BUTYROLACTONE, DIMETHYL CARBONATE, DIMETHOXYETHANE, ACETONITRILE, DIMETHYL SULFOXIDE. DIMETHYL FORMIMIDE, ANF THE MIXTURES THEREOF, AND HAVING DISSOLVED THEREIN SOLUBLE SALTS OF THE LIGHT METALS, SAID SALTS SELECTED FROM THE GROUP CONSISTING OF THE PERCHLORATES, HEXAFLUOROPHOSPHATES, TETRAFLUOROBORATES, TETRACHLORLUMINATES, AND HEXAFLUOROARESNATES OF THE LIGHT METALS.
Claim 2
Dependent Claim
118 words
A HIGH ENERGY DENSITY CELL COMPRISING A POSITIVE ELECTRODE SELECTED FROM THE GROUP CONSISTING OF THE TELLURIDES OF SILVER, COPPER, IRON, COBALT, NICKEL, MERCURY, THALLIUM, LEAD, AND BISMUTH AND THE MIXTURES THEREOF; A NEGATIVE ELECTRODE COMPRISING A LIGHT METAL SELECTED FROM THE GROUP CONSISTING OF LI, NA, K, BE, MG, CA AND AL, SAID ELECTRODES BEING DISPOSED IN AN ELECTROLYTE COMPRISING AN ORGANIC SOLVENT SELECTED FROM THE GROUP CONISTING OF TETRAHYDROFURAN, N-NITROSODIMETHYLAMINE, DIMETHYL SULFITE, PROPYLENE CARBONATE, GAMMA-BUTYROLACTONE, DIMETHYL CARBONATE, DIMETHOXYETHANE, ACETONITRILE, DIMETHYL SULFOXIDE. DIMETHYL FORMIMIDE, ANF THE MIXTURES THEREOF, AND HAVING DISSOLVED THEREIN SOLUBLE SALTS OF THE LIGHT METALS, SAID SALTS SELECTED FROM THE GROUP CONSISTING OF THE PERCHLORATES, HEXAFLUOROPHOSPHATES, TETRAFLUOROBORATES, TETRACHLORLUMINATES, AND HEXAFLUOROARESNATES OF THE LIGHT METALS.
Claim 3
Dependent Claim
26 words
The cell in claim 1 wherein the electrolyte is composed of a solution of lithium perchlorate in tetrahydrofuran and the negative electrode is composed of lithium.
Claim 4
Dependent Claim
21 words
The cell in claim 2 wherein the positive electrode is composed of a mixture of silver telluride and a conductive diluent.
Claim 5
Dependent Claim
21 words
The cell in claim 2 wherein the positive electrode is composed of a mixture of copper telluride and a conductive diluent.
Claim 6
Dependent Claim
21 words
The cell in claim 2 wherein the positive electrode is composed of a mixture of iron telluride and a conductive diluent.
Claim 7
Dependent Claim
21 words
The cell in claim 2 wherein the positive electrode is composed of a mixture of cobalt telluride and a conductive diluent.
Claim 8
Dependent Claim
21 words
The cell in claim 2 wherein the positive electrode is composed of a mixture of nickel telluride and a conductive diluent.
Claim 9
Dependent Claim
21 words
The cell in claim 2 wherein the positive electrode is composed of a mixture of mercury telluride and a conductive diluent.
Claim 10
Dependent Claim
21 words
The cell in claim 2 wherein the positive electrode is composed of a mixture of thallium telluride and a conductive diluent.
Claim 11
Dependent Claim
21 words
The cell in claim 2 wherein the positive electrode is composed of a mixture of lead telluride and a conductive diluent.
Claim 12
Dependent Claim
21 words
The cell in claim 2 wherein the positive electrode is composed of a mixture of bismuth telluride and a conductive diluent.
Claim 13
Dependent Claim
25 words
The cell in claim 1 wherein the soluble salts are selected from the group consisting of the perchlorates, hexafluorophosphates, tetrafluoroborates, tetrachloroaluminates, and hexafluoroarsenates of lithium.
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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) | 1978-04-14 | 1978-10-14 | 1979-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-14 | 1982-10-14 | 1983-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-14 | 1986-10-14 | 1987-04-15 | $7700.00 | Window Closed / Lapsed |