<p>The device has a cathode (2) and an anode (4) separated from each other by a separator (6). An electrolyte and current collectors (8) are placed such that the anode and the cathode are arranged between the separator and one of the current collectors. The current collectors are made from a partially amorphous material including a metal element. The collectors have a thickness ranging between 1 and 50 micrometer and preferably between 5 and 25 micrometer. Each collector includes a lower face (91) and an upper face (90).</p>
