RANEY NICKEL BIPOROUS ELECTRODE AND METHOD FOR MANUFACTURING SUCH AN ELECTRODE

摘要

Biporous electrode, comprising a metallically conductive wide pore layer, and at least one metallically conductive narrow pore layer containing Raney nickel and facing the counter electrode of a galvanic element. This electrode comprises a framework element constituted by a prefabricated nickel-plated or copper-colored textile substrate, with a porosity of 82 to 97%, for example made of carbon fibers or organic fibers, to which Raney nickel or the alloy of base used to form Raney nickel are incorporated by application of mechanical forces and optionally fixed and / or water-repellent in such a way that the framework element retains, on one of its sides, or in the middle of its thickness, an area practically free of Raney nickel, which forms the large-pore layer of the electrodes, Raney nickel or its base alloy can be partially replaced by ordinary nickel. /P P Special application in the manufacture of fuel cells, accumulator cells and electrolytic cells.