Process for the preparation of collectors-electrodes for the thin film cell, collectors-electrodes assemblies and cells obtained

Claim 1

Process for the preparation of a collector-electrode assembly for a polymer electrolyte electrochemical cell comprising the following steps: metallization by deposit under vacuum, of one metal, on one face of an insulating plastic support film which is about 1 to 30 microns thick, the metal deposited having a thickness adjusted between about 0.005 and 0.1 micron in order to give a metallized film having a sufficient electronic conductivity to initiate a uniform electrochemical deposit said metal being selected from copper, nickel, iron, molybdenum, chromium, carbon, zinc silicon or gold; electrochemical deposit, of at least one additional metallic layer, of a total thickness between 0.1 and 4 microns, on the surface of the metallized film, the metal of the additional deposited metallic layer being selected from nickel, iron, chromium, molybdenum and alloys thereof and for its compatibility with the corresponding electrode of the cell; laminating or forming a film of an anode or cathode of the cell or projecting or wetting molten material of the electrode of the cell on at least a portion of the surface of the supported anode or cathode collector thus constituted so as to cause adhesion of the material of the electrode to the supported collector film.