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| Galvanic element, particularly alkaline storage battery |
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| Chemoelectric cell |
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| Rolling mill roll for a hot train of rolls |
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| Water cooled bipolar battery apparatus |
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| Luminescent screen of a color television tube |
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Fluidized air-depolarized electrodes and related apparatus and methods
| Details |
Inventors: Zaromb, Solomon;
Assignee:
Primary Examiner: Skapars; Anthony
Assistant Examiner:
Attorney, Agent or Firm:
Improved oxygen-consuming electrochemical cells are provided with a fluidized-bed oxygen absorber (1), wherein electrolyte-wetted carrier particles (3), especially electronically conductive catalyst particles, are oxygen-enriched, and a substantially bubble-free fluidized-bed cathode (12), wherein the oxygen transported by said carrier particles is electrochemically reduced. Carrier particles comprising activated carbon may provide sufficient surfaces area per unit weight to assure adequate oxygen transport. An intermediary oxidation-reduction couple may be included in the electrolyte to facilitate these oxygen-absorption and electro-reduction steps. The oxygen absorber (1) may be either separated from the cathode (12) or may form part of the same compartment (28), in which case an oxygen-permeable electrolyte-impermeable membrane (23) must be provided through which oxygen from ambient air may readily pass and be rapidly picked up and transported by the fluidized carrier particles (3). The fluidization of the carrier particles (3) in the oxygen absorber (1) and the cathode (12) may be effected in a moving vehicle by an air interceptor means (6) which utilizes the pressure of airimpinging on such a vehicle to effect air flow in the absorber (1) and fludization within the cathode (12) without recourse to any significant auxiliary power. |
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DETAILED DESCRIPTION Briefly, my invention consists of providing an oxygen-absorbing means wherein carrier particles, especially electronically conductive catalyst particles, are covered with any oxygen-enriched electrolyte layer, and a substantially bubble-free slurry electrode, wherein a major portion of the oxygen in said oxygen-enriched layer is electrochemically reduced.
An intermediary oxidation-reduction or redox couple in the electrolyte, such as iodide-iodate ions, may facilitate these oxygen-absorption and electro-reduction steps.
Said oxygen-absorbing means may be either physically apart from the slurry electrode or it may form part of the same compartment.
In the latter case, the oxygen-absorbing means must comprise a semi-permeable membrane, which may be made of porous polytetrafluoroethylene, through which oxygen from ambient air may readily pass and be rapidly picked up and transported towards the cathode by the fluidized carrier particles.
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