Patent US3898097A successfully refreshed from Google Patents.
US3898097A
Expired / Lapsed
US
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Secondary power cell
Assignee: Individual
•
Filing: 1974-11-11
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Granted: 1975-08-05
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Expires: 1994-11-11
Abstract
Abstract A secondary electrochemical power-producing cell is described which contains an alkali metal or alkaline earth metal (e.g., lithium) anode having an energetically homogeneous amalgamated surface film saturated with anode metal atoms. The cell cathode collector is preferably coulombically asymmetrical to permit, during recharge, the reforming of gravimetrically deformed or sagged anodes.
Inventors
- 👤 Anthony V Fraioli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:14
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/05; H01M4/00; H01M4/02; H01M4/13; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
93 words
A SECONDARY ELECTROCHEMICAL POWER-PRODUCING CELL COMPRISING, IN COMBINATION: A. A SOLID ALKALI METAL OR ALKALINE EARTH METAL ANODE DISPOSED ON A COPPER SCREEN COATED WITH A METAL ALLOYABLE TO BOTH MERCURY AND ANODE METAL, SAID ANODE HAVING AN ENERGCTICALLY HOMOGENEOUS AMALGAMATED SURFACE FILM SATURATED WITH ANODE METAL ATOMS SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL ATOMS AND ALKALINE EARTH METAL ATOMS, B. A NON-AQUEOUS ELECTROLYTE COMPRISING A CATHODE DEPOLIZER MISCIBLE IN SAID ELECTROLYTE, C. A SALT OF THE ANODE METAL PROVIDES IONIC TRANSFER AND CELL CONDUCTIVITY IN THE ELECTROLYTE, SAID SALT CONSTITU-
Claim 2
Dependent Claim
93 words
A SECONDARY ELECTROCHEMICAL POWER-PRODUCING CELL COMPRISING, IN COMBINATION: A. A SOLID ALKALI METAL OR ALKALINE EARTH METAL ANODE DISPOSED ON A COPPER SCREEN COATED WITH A METAL ALLOYABLE TO BOTH MERCURY AND ANODE METAL, SAID ANODE HAVING AN ENERGCTICALLY HOMOGENEOUS AMALGAMATED SURFACE FILM SATURATED WITH ANODE METAL ATOMS SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL ATOMS AND ALKALINE EARTH METAL ATOMS, B. A NON-AQUEOUS ELECTROLYTE COMPRISING A CATHODE DEPOLIZER MISCIBLE IN SAID ELECTROLYTE, C. A SALT OF THE ANODE METAL PROVIDES IONIC TRANSFER AND CELL CONDUCTIVITY IN THE ELECTROLYTE, SAID SALT CONSTITU-
Claim 3
Dependent Claim
54 words
A secondary electrochemical power-producing cell according to claim 1 wherein: the anode metal atoms consist essentially of lithium atoms; the cathode depolarizer is a Lewis acid selected from the group consisting of thionyl chloride, sulfur dioxide, and phosphoryl chloride; and the salt of the anode metal is a lithium salt of the cathode depolarizer.
Claim 4
Dependent Claim
31 words
A secondary electrochemical power-producing cell according to claim 2 wherein the mercury required to form the energetically homogeneous amalgamated anode surface film is introduced in the electrolyte as a mercurous salt.
Claim 5
Dependent Claim
69 words
A secondary electrochemical power-producing cell according to claim 2 wherein the energetically homogeneous amalgamated anode surface film is formed after cell assembly by direct reaction of the anode metal with a mercurous salt, the mercurous salt being added to the non-aqueous electrolyte in an amount sufficient to provide substantially complete anode surface amalgamation, said mercurous salt being replaced by a substantially equivalent amount of anode metal salt following amalgamation.
Claim 6
Dependent Claim
30 words
A secondary electrochemical power-producing cell according to claim 1 wherein the cathode is coulombically asymmetrical to permit the reforming of gravimetrically deformed or sagged anodes during recharging of the cell.
Claim 7
Dependent Claim
43 words
A secondary electrochemical power-producing cell according to claim 5 wherein the cathode has asymmetrically distributed capacity, said cathode when fully discharged and then recharged, preferentially redistributes the anode metal onto those sections of the anode screen from which the metal was gravitationally displaced.
Claim 8
Dependent Claim
34 words
A secondary electrochemical power-producing cell according to claim 1 wherein the metal alloyable to both mercury and anode metal coated on the anode screen is selected from the group consisting of aluminum and magnesium.
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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) | 1978-08-04 | 1979-02-03 | 1979-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-04 | 1983-02-03 | 1983-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-04 | 1987-02-03 | 1987-08-05 | $7700.00 | Window Closed / Lapsed |