| abstract |
The invention concerns a device for storing electric power comprising an electrode layer ( 3, 11 ) and a collector layer ( 1 ) associated with the electrode layer, characterized in that it also comprises a barrier layer ( 2, 12 ) made of metal nitride, the barrier layer ( 2, 12 ) being interposed between the electrode layer ( 3, 11 ) and the collector layer ( 1 ), the harrier layer ( 2, 12 ) being adapted to prevent diffusion of ions contained in an electrolyte ( 14, 16 ) up to the collector layer ( 1 ). |