| abstract |
Energy storage device, comprising an electrode layer (3, 5, 9, 11) and a collector layer (1, 7) associated with the electrode layer, which also comprises a barrier layer (2, 6, 8 , 12) formed from metal nitride MeNx, in which Me is a metal or several metals, the barrier layer (2, 6, 8, 12) being interposed between the layer (3, 5, 9, 11) of the electrode and the layer (1, 7) of the collector, the barrier layer (2, 6, 8, 12) being able to prevent diffusion of ions contained in an electrolyte (13, 14, 16) to the layer (1, 7) collector, characterized in that the barrier layer (2, 6, 8, 12) has a stoichiometry x between 0.85 and 1.05, a grain size between 10 and 30 nanometers and a thickness between 0.15 and 0.30 micrometers |