| 摘要 |
PROBLEM TO BE SOLVED: To provide a secondary battery having high output performance while retaining capacity.SOLUTION: A secondary battery includes a collector foil 33 and an electrode body having an active material layer provided on the collector foil, and uses metal ions of metal included in the active material layer, as mobile ions. The active material layer comprises at least two layers. A first active material layer (a first positive electrode layer 31) on a collector foil side has higher capacity than a second active material layer (a second positive electrode layer 32) on the other side. The second active material layer has higher output than the first active material layer, and is electrically connected to the collector foil via a cut and raised portion 34 functioning as a conductive member. |
