US4048406A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrode for a rechargeable electrochemical current source, and method of making same
Assignee: Prazska Akumulatorka Narodni Podnik
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Filing: 1975-05-21
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Granted: 1977-09-13
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Expires: 1995-05-21
Abstract
Abstract Electrode for a rechargeable electrochemical current source and a method of making the same, said current source employing an electrolyte, the electrode having an electrically conductive collector and a mixture of an active mass in a plastic material distributed over the collector and sintered thereon to form an integral element. The electrode has a porous layer of material covering at least a substantial portion of its active surface, the porous layer being made of an electrically non-conductive material which is chemically inert with respect to the electrolyte, the plastic material being bonded to the porous layer by being sintered thereto.
Inventors
- 👤 Josef Sandera
- 👤 Milan Calabek
- 👤 Miroslav Cenek
- 👤 Frantisek Kalab
- 👤 Vojtech Koudelka
- 👤 Oldrich Kouril
- 👤 Jiri Malik
- 👤 Josef Vanacek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:17
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
99 words
In an electrode for a rechargeable storage battery employing an electrolyte, the electrode having a current collector and a mixture of an active mass and a plastic material distributed over the current collector and sintered thereon to form a skeleton of plastic in the body of said electrode, the improvement which comprises a porous layer of material covering at least a substantial part of the active surface of the electrode, the porous layer being made of an electrically non-conductive material which is chemically inert with respect to the electrolyte and which is bonded to the skeleton of plastic material.
Claim 2
Dependent Claim
99 words
In an electrode for a rechargeable storage battery employing an electrolyte, the electrode having a current collector and a mixture of an active mass and a plastic material distributed over the current collector and sintered thereon to form a skeleton of plastic in the body of said electrode, the improvement which comprises a porous layer of material covering at least a substantial part of the active surface of the electrode, the porous layer being made of an electrically non-conductive material which is chemically inert with respect to the electrolyte and which is bonded to the skeleton of plastic material.
Claim 3
Dependent Claim
26 words
An electrode according to claim 1, wherein the plastic material is bonded to the porous layer by being sintered thereto to form an integral element therewith.
Claim 4
Dependent Claim
19 words
An electrode according to claim 2, wherein the porous layer covers all of the active surface of the electrode.
Claim 5
Dependent Claim
16 words
An electrode according to claim 1, wherein the porous layer is made of woven glass fibers.
Claim 6
Dependent Claim
105 words
In a method of making an electrode for a rechargeable storage battery employing an electrolyte, the electrode having a current collector and a mixture of an active mass and a plastic material distributed over the collector and sintered thereon to form an integral element therewith, the improved method which comprises placing a porous layer of material on the electrode to cover at least a substantial part of the active surface of the electrode, the porous layer being made of an electrically non-conductive material which is chemically inert with respect to the electrolyte, and bonding the plastic material to the porous layer by sintering it thereto.
Claim 7
Dependent Claim
105 words
In a method of making an electrode for a rechargeable storage battery employing an electrolyte, the electrode having a current collector and a mixture of an active mass and a plastic material distributed over the collector and sintered thereon to form an integral element therewith, the improved method which comprises placing a porous layer of material on the electrode to cover at least a substantial part of the active surface of the electrode, the porous layer being made of an electrically non-conductive material which is chemically inert with respect to the electrolyte, and bonding the plastic material to the porous layer by sintering it thereto.
Claim 8
Dependent Claim
38 words
A method according to claim 5, wherein the sintering of the mixture of the active mass and the plastic material and the bonding of the plastic material to the porous layer by sintering it thereto take place simultaneously.
Claim 9
Dependent Claim
50 words
A method according to claim 5, wherein the sintering of the mixture of the active mass and the plastic material takes place as a first sintering step, and the bonding of the plastic material to the porous layer by sintering it thereto takes place as a second, distinct sintering step.
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) | 1980-09-12 | 1981-03-14 | 1981-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-12 | 1985-03-14 | 1985-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-12 | 1989-03-14 | 1989-09-13 | $7700.00 | Window Closed / Lapsed |