| 摘要 |
PROBLEM TO BE SOLVED: To provide an electrode capable of improving ion conductivity in the surface direction of the electrode, as compared with conventional electrodes.SOLUTION: An electrode 3 includes an active material layer 5 having countless pores 5a. The active material layer 5 includes a hole 25 bored in the thickness direction from the surface of the active material layer 5, and the pores 5a connected in the surface direction of the active material layer 5 from the side surface of the hole 25. The porosity of the active material layer 5 in a peripheral edge portion 29 of the hole is smaller than that in a portion 30 except the peripheral edge portion. |
