Abstract: The invention relates to an electrode layer composite for forming planar electrodes (1, 2) in electrochemical storage elements, wherein the electrode layer composite comprises at least one first layer (6, 8) containing electrode material and one second layer (7, 9) containing electrode material, wherein the first layer (6, 8) has a higher energy density (specific or area capacity) than the second layer (7, 9), while the second layer (7, 9) has a higher power density (current carrying capability) per unit area than the first layer (6, 8).

Abstract: The invention relates to an improved electrochemical construction or storage element for storing and discharging electric energy, characterized by a reduction or the prevention of a formation of magnetic stray fields. For this purpose the element has at least two electrochemical cells comprising the typical components. Said cells are disposed relative to each other such that a tag (12a) of a cell (20a), said tag being connected to the cathode accumulator, is positioned relative to a tag (12b) of an adjacent cell (20b) connected to the anode accumulator such that magnetic fields generated by moving electric charges in the tags (13a, 12b) overlap and substantially compensate each other.