| 摘要 |
Disclosed herein is an electrode group stack including a plurality of electrode groups, each of which includes a cathode, an anode, and a first separator disposed between the cathode and the anode, and a second separator disposed between the electrode groups, wherein the electrode groups are stacked in a height direction on the basis of a plane, some or all of the electrode groups have different areas of opposite stack surfaces at a stack interface therebetween, and the electrode group stack includes an electrode group satisfying equation (1): T ‰¥ (Tsum x 0.5) (1), where T indicates a thickness of an arbitrary electrode group and Tsum indicates a sum of thicknesses of the electrode groups constituting the electrode group stack. |
