Abstract: The cadmium negative electrode has a structure serving as a collector and made of nickel foam. The sponge is filled with a mixture consisting mainly of cadmium oxide and contains nickel sulphate in the proportion of 1.8 to 2.7% by weight of the total mixture, expressed in the form of nickel.

Abstract: Collector support for lead/lead oxide batteries is made of a screen of electrolyte-resistant polymer coated with a conductive underlayer and a layer of lead or a lead rich alloy having a mass per surface comprised between 30 and 40 g/dm.sup.2 relative to the projected surface area of the collector support. The dimensions of the screen are such that no point inside the screen pattern is located at a distance greater than 2.5 mm from any strand of the screen.

Abstract: Method and apparatus for pasting a porous structure, such as a battery support plate, which provides for inserting pasty material from a vibrating hopper continuously and evenly as a sandwich filling of controlled thickness between two conveyer strips driven at the same speed to deliver pasty material with a predefined thickness and with a flat translational motion onto a substantially horizontal platen; removing the conveyor strip opposite that in contact with the platen to uncover the upper face of the pasty material; bringing the porous structure level with the platen onto the upper surface of the pasty material; pressing the pasty material into the porous structure; and removing the pasted porous structure from the lower strip. The porous structure can be simultaneously pasted on its upper side using a secondary conveyer strip.

Abstract: The invention relates to a structure of a positive electrode possessing improved electrical capacity and intended for electrochemical generators working with a liquid electrolyte. It comprises, on the one hand, a metallic collector of high porosity, in particular of the non-woven fibrous type or of the isotropic, cross-linked type of open porosity and, on the other hand, a nickel hydroxide-based active material filling in part the pores of the collector and containing cobalt. This structure is characterized by a heterogeneous dispersion of the cobalt within the active material.

Abstract: A method of fabrication of porous metal structures as applicable to the manufacture of supports for electrodes, catalysts, filters or sound insulators. A porous structure is fabricated from a support consisting of a felt, a woven or reticulated structure in accordance with the following steps:(a) initial metallization of the support;(b) chemical and/or electrochemical metallization if so required;(c) removal of the support if necessary.The distinctive feature of the invention lies in the fact that the initial metallization step consists of metallization in vacuum.

Abstract: The electrode is formed from a permeable thin substrate constituted by an inorganic or organic substance whose porous or fibrous texture is such that the ratio between the effective surface and the boundary surface is large. This substrate is metallized over the entire effective surface, throughout its thickness, in order to constitute a charge collector. On this is then formed, over the entire effective surface, that is to say, throughout the thickness of the substrate, a thin deposit of active electrode material so that neither the porosity of the substrate nor the effective surface are substantially reduced.

Abstract: In an electrolytic cell, an electrolyte is caused to flow between an anode and a cathode. The conventional separator between the anode compartment and the cathode compartment can be eliminated, thus allowing circulation of a dispersed electrode throughout the electrolytic cell and obviating the drawbacks resulting from the use of a separator. The dispersed electrode is constituted by a suspension of conductive particles in said electrolyte.

Abstract: Process for regenerating activated carbon particles contaminated by oxidizable impurities. An electrolysis cell is divided by a liquid-permeable membrane to define an anodic chamber and a cathode chamber therein both filled in operation with an electrolyte. Recycling conduits communicate with the anode chamber and a recirculating pump to establish a fluid circuit therewith. A suspension of particles of activated carbon contaminated by oxidizable impurities suspended in an aqueous solution of an electrolyte is loaded into the fluid circuit and circulated therethrough. A voltage applied to the electrodes of the electrolysis cell develops an electrolysis reaction in the aqueous solution of the electrolyte and atomic oxygen is liberated at the surface of the anode electrode. As particles of the activated carbon flow through the anode cell they contact the anode electrode and atomic oxygen is liberated at their surfaces which oxidizes impurities adsorbed by the particles.

Abstract: A separator free electrochemical generator wherein one of the electrodes, particularly the anode, is formed of a particulate active material suspended within an electrolyte and which comprises means for causing the circulation of the suspension formed within the corresponding electrode compartment in contact with a current collector, wherein further the active material forms a coating on cores formed of an inert material, the separation of the opposite electrode compartments being achieved by the collector itself which is provided with holes having sizes sufficient for authorizing the free passage of the electrolyte, however lower than the size of the inert cores of said particles.

Abstract: A process for producing electric current by the electrochemical oxidation of an active anodic metal dispersed in an alkaline electrolyte.The electrolyte is circulated into contact with a second metal which is more electronegative than the active metal. A displacement reaction precipitates the active metal from its soluble oxidation products. There is obtained as a result a repeated recovery for reuse of the active metal (zinc) with the aid of the more electronegative metal (aluminium) which then supplies the energy for the production of current and is oxidized to form soluble products.The process is exemplified by zinc as the active metal and aluminium and magnesium as the strongly electronegative metals.