| abstract |
The present invention relates to an energy storage device. An energy storage device according to an embodiment of the present invention is disposed at a boundary between a case providing an inner space having a first space and a second space, an electrolyte filling the inner space of the case, the first space and the second space, A positive electrode structure having a positive electrode active material layer containing a metal oxide composite, a first negative electrode having a first negative electrode active material layer disposed in a first space and containing graphite, and an activated carbon disposed in a second space It includes a second negative electrode having a second negative electrode active material layer comprising a. |