Abstract: An oxygen electrode for alkaline galvanic cells. The electrode includes a talyst-containing carbon layer, a current collector, and a preferably foil-like separator for separating a liquid chamber from a gas chamber in such a way that the gas can pass to the carbon layer but the liquid cannot enter the gas chamber. The electrode has a structurally simple construction as a multi-layer, gas diffusion electrode, the current density of which, in the temperature range of between approximately 20.degree. and 80.degree. C., is approximately 350 mA/cm.sup.2 during operation with air, and greater than 1 A/cm.sup.2 during operation with oxygen. The current collector includes a metal grid which is at least partially embedded in a carbon layer. In the method of producing such an oxygen electrode, a catalyst salt solution is mixed with an aqueous activated carbon suspension and is deposited onto the activated carbon to form a catalyst dispersion.

Abstract: A galvanic element, particularly a metal-air cell, comprising a consumable etal electrode of flat shape which extends into a container containing the electrolyte, a gas-diffusion electrode which can be freely flushed by gas and particularly air from the outside, being arranged at a distance from the working surface of said electrode. In order to improve the electrolyte circulation in such a system and thus promote the electrochemical conversion, the hydrogen produced upon the electrochemical conversion is collected within the container which contains the electrolyte and the pressure which builds up is utilized for the transport of the electrolyte. For this purpose, a gas-collection space is provided in the electrolyte container so that the gas pressure can act on the electrolyte and a pipe system is present through which the electrolyte which has been displaced is conducted out of the upper region of the container into the lower region of the container.

Abstract: A battery which makes possible a long-time operation under high load. The ttery is made of a plurality of galvanic elements, especially metal-air-cells, each of which comprises a consumable metal electrode of planar shape which extends into a receptacle which is flushed with electrolyte. The sidewalls of the receptacle can be flushed free of air or oxygen. Each of the receptacles supports at least one gas diffusion electrode at a distance from the working surface of the consumable metal electrodes. In order to provide a battery which can be stored without restriction due to activation and deactivation, and which permits a rapid mechanical recharging independent of the electric circuit, a supply reservoir for the electrolyte is disposed in a housing below at least one cell unit. The supply reservoir is connected via a closure member with an electrolyte activation tank which is disposed at least partially above the working level of the electrolyte in the cells.

Abstract: A galvanic element in the form of a flat, high power cell, especially a ml-air-cell, which is cooled with cooling water, and can be assembled to a battery which comprises a plurality of cells. The flat cell comprises bipolar electrodes which have a consumable metal electrode in flat form as an anode, a cathode (oxygen electrode), and a liquid electrolyte. It is an object of the present invention to be able to control the temperature, especially for cooling, of each individual electrode directly by means of a medium which is independent of the liquid electrolyte. For this purpose, the bipolar electrodes are electrically interconnected, and between them is arranged a gasket which forms a cooling chamber. As a result, the heat balance and temperature of not only the anode but also of the cathode can be controlled directly.