Patent EP0032267A1 successfully refreshed from Google Patents.
US3871918A
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Negative electrode for electrochemical generator
Assignee: Industrielle Des Piles Electriques 'cipel'fr197205307219352 Cie
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Filing: 1973-05-29
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Granted: 1975-03-18
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Expires: 1993-05-29
Abstract
Abstract Electrochemical storage cell embodying a novel negative electrode of zinc powder grains suspended in a three-dimensional gel constituted by a polymerizing reaction product of acrylamide, acrylic acid and methylenebisacrylamide, a novel polymer type electrolyte for said cell, method of preparing said negative electrode and said electrolyte, and method for producing said cell are described.
Inventors
- 👤 Claude Viescou
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:13
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/62; H01M4/621; H01M4/622; H01M12/00; H01M12/04; H01M12/06; H01M4/06; H01M2004/026; H01M2004/027; H01M2300/00; H01M2300/0002; H01M2300/0014; H01M2300/0085; Y; Y02; Y02P; Y02P70/00; Y02P70/50
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
71 words
NEGATIVE ELECTRODE FOR AN ELECTROCHEMICAL CELL WHOSE ACTIVE MATERIAL MAINLY CONSISTS OF ZINC POWDER IN THE FORM OF A SUSPENSION IN A GEL, CHARACTERIZED IN THAT THE ZINC PARTICLES ARE CONTAINED AND RETAINED IN A THREE-DIMENSIONAL GEL AND MAINTAINED THEREIN IN A STABLE SPACE CONFIGURATION, THE THREEDIMENSIONAL GEL BEING CONSTITUTED BY A POLYMERIZING REACTION PRODUCT OF ACRYLAMIDE, ACRYLIC ACID AND METHYLENEBISACRYLAMIDE, SAID GEL CONTAINING AN ELECTROLYTE CONSISTING OF POTASSIUM HYDROXIDE SOLUTION.
Claim 2
Dependent Claim
71 words
NEGATIVE ELECTRODE FOR AN ELECTROCHEMICAL CELL WHOSE ACTIVE MATERIAL MAINLY CONSISTS OF ZINC POWDER IN THE FORM OF A SUSPENSION IN A GEL, CHARACTERIZED IN THAT THE ZINC PARTICLES ARE CONTAINED AND RETAINED IN A THREE-DIMENSIONAL GEL AND MAINTAINED THEREIN IN A STABLE SPACE CONFIGURATION, THE THREEDIMENSIONAL GEL BEING CONSTITUTED BY A POLYMERIZING REACTION PRODUCT OF ACRYLAMIDE, ACRYLIC ACID AND METHYLENEBISACRYLAMIDE, SAID GEL CONTAINING AN ELECTROLYTE CONSISTING OF POTASSIUM HYDROXIDE SOLUTION.
Claim 3
Dependent Claim
40 words
Negative electrode according to claim 1, characterized in that the zinc particles are not contiguous, in the whole, when the electrode is in the charged state and in that they become contiguous as the discharge of the said electrode progresses.
Claim 4
Dependent Claim
17 words
Negative electrode according to claim 1, characterized in that the potassium hydroxide solution is saturated with zincate.
Claim 5
Dependent Claim
28 words
Negative electrode according to claim 1, characterized in that the final porosity of the electrode in the discharged state is comprised between about 25 and about 80 percent.
Claim 6
Dependent Claim
24 words
Negative electrode according to claim 1, characterized in that the original porosity of the electrode in the charged state is greater than 50 percent.
Claim 7
Dependent Claim
14 words
Negative electrode according to claim 1, characterized in that the zinc particles are amalgamated.
Claim 8
Dependent Claim
72 words
Electrochemical cell comprising a positive electrode, a negative electrode consisting of zinc particles as a suspension in a gel, and wherein said zinc particles are contained and retained in said gel in stable spaced configuration, said gel being of three-dimensional type constituted by a polymerizing reaction product of acrylamide, acrylic Acid and methylenebisacrylamide, a porous separator and KOH electrolyte located between the said electrodes and in the pores of said porous separator.
Claim 9
Dependent Claim
72 words
Electrochemical cell comprising a positive electrode, a negative electrode consisting of zinc particles as a suspension in a gel, and wherein said zinc particles are contained and retained in said gel in stable spaced configuration, said gel being of three-dimensional type constituted by a polymerizing reaction product of acrylamide, acrylic Acid and methylenebisacrylamide, a porous separator and KOH electrolyte located between the said electrodes and in the pores of said porous separator.
Claim 10
Dependent Claim
31 words
Electrochemical cell according to claim 7, characterized in that the said electrolyte located between the electrodes and in the pores of said porous separator is constituted by a potassium hydroxide solution.
Claim 11
Dependent Claim
17 words
Electrochemical cell according to claim 8, characterized in that the potassium hydroxide solution is saturated with zincate.
Claim 12
Dependent Claim
21 words
Electrochemical cell according to claim 8, characterized in that the electrolyte located between the electrodes is immobilized in said porous separator.
Claim 13
Dependent Claim
30 words
Electrochemical cell according to claim 8, characterized in that the electrolyte located between the electrodes and in the pores of the said separator is in the form of a gel.
Claim 14
Dependent Claim
43 words
Electrochemical cell according to claim 8, characterized in that the electrolyte located between the electrodes is also in the form of a three-dimensional type gel constituted by a polymerizing reaction product of acrylamide, acrylic acid and methylenebisacrylamide that gells said postassium hydroxide solution.
References Cited (Backward Citations)
US2593893A
Cited
US2938064A
Cited
US3056849A
Cited
US3207633A
Cited
US3451851A
Cited
US3335031A
Cited
US3586539A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-17 | 1978-09-16 | 1979-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-17 | 1982-09-16 | 1983-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-17 | 1986-09-16 | 1987-03-18 | $7700.00 | Window Closed / Lapsed |