US4383010A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of a layer of an electrode for a cell, particularly for a fuel cell and electrode containing such a layer
Assignee: ZERO EMISSION VEHICLE Co BELGIUM bvba
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Filing: 1981-07-09
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Granted: 1983-05-10
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Expires: 2001-07-09
Abstract
Abstract The invention relates to a process for the production of a layer of an electrode for a cell, particularly for a fuel cell, starting from an electrically conductive fine-grained powder and a powdery binder, according to which the powder and the binder are mixed in dry condition and the mixture is rolled to form a layer, characterized in that the dry mixture is subjected to an agglomeration step, the agglomerates obtained are broken and pressed together to form a whole and the pressed whole is rolled, in various steps, to form a layer. The process also relates to the production of an electrode containing such a layer.
Inventors
- 👤 Gustaaf J. F. Spaepen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:30
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/86; H01M4/88; H01M4/8875; H01M4/8878; H01M4/8882; H01M4/8896; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
98 words
A process for the production of a layer for an electrode for a cell, particularly for a fuel cell, comprising the steps of: (a) mixing an electrically conductive fine-grained powder and a powdery binder in a dry condition; (b) subjecting the conductive fine-grained powder and a powdery binder mixed according to step (a) to agglomeration in a dry condition; (c) breaking the agglomerates formed according to step (b) to obtain particles; (d) pressing the particles obtained according to step (c) to form a mass; and (e) rolling the mass obtained according to step (d) to form a layer.
Claim 2
Dependent Claim
98 words
A process for the production of a layer for an electrode for a cell, particularly for a fuel cell, comprising the steps of: (a) mixing an electrically conductive fine-grained powder and a powdery binder in a dry condition; (b) subjecting the conductive fine-grained powder and a powdery binder mixed according to step (a) to agglomeration in a dry condition; (c) breaking the agglomerates formed according to step (b) to obtain particles; (d) pressing the particles obtained according to step (c) to form a mass; and (e) rolling the mass obtained according to step (d) to form a layer.
Claim 3
Dependent Claim
36 words
A process according to claim 1 wherein step (d) is practiced so as to form a mass having a thickness of between 50 and 200 times the thickness of the layer formed according to step (e).
Claim 4
Dependent Claim
34 words
A process according to claim 1 or 2 wherein step (b) is practiced so as to form scale-shaped agglomerates having a surface area between a few square centimeters to a few hundred square centimeters.
Claim 5
Dependent Claim
21 words
A process as in claim 1 or 2 wherein step (d) is practiced utilizing particles having sizes less than 600 μm.
Claim 6
Dependent Claim
37 words
A process as in claim 4 further comprising the steps of: (f) repeating steps (a)-(e) to form a second layer; and (g) rolling the first formed layer and the second formed layer together to obtain one layer.
Claim 7
Dependent Claim
20 words
A process as in claim 5 wherein steps (e) and (g) are practiced utilizing a plurality of discrete rolling steps.
Claim 8
Dependent Claim
25 words
A process as in claim 6 wherein steps (e) and (g) are practiced by rolling the mass in different directions in the discrete rolling steps.
Claim 9
Dependent Claim
16 words
A process as in claim 7 wherein between 10 to 50 discrete rolling steps are practiced.
Claim 10
Dependent Claim
19 words
A process as in claim 8 wherein all steps are practiced at a temperature between 280° to 310° K.
Claim 11
Dependent Claim
27 words
A process as in claim 1 or 2 wherein between 2 to 30% by weight of the layer obtained in step (e) consists of the powdery binder.
Claim 12
Dependent Claim
26 words
An electrode comprising at least one layer produced according to claim 1 or 2 wherein said at least one layer is attached to a porous collector.
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) | 1986-05-09 | 1986-11-08 | 1987-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-09 | 1990-11-08 | 1991-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-09 | 1994-11-08 | 1995-05-10 | $7700.00 | Window Closed / Lapsed |