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.

Abstract: An improved active electrode composition for a zinc electrode of an electrochemical accumulator is provided with an ingredient that inhibits the passage of zinc into the alkaline electrolyte of the accumulator during the discharge process. The ingredient is preferably an alkaline fluoride, which during discharge forms with the zinc a compound which is only slightly soluble, if at all, in the electrolyte. The resulting prevention of the reversible movement of zinc into and out of the solution is effective to prevent an undesired shifting of active material on the collector of the electrode, and generally to increase its life.

Abstract: An improved active electrode composition for a plastic-bonded electrode of an electrochemical accumulator is described. A powder of the principal electrode active material is mixed with 1.5 - 60% by weight of oxalic and/or a salt thereof. The admixture of such ingredients with a suitable binding agent may then be applied to an expanded metallic collector and then heat and pressure treated in a conventional manner to obtain the required electrode.