| 摘要 |
A negative electrode active material layer (243) of a lithium-ion secondary battery (100) has a region (243a) facing a positive electrode active material layer (223) and regions (243b1), (243b2) not facing the positive electrode active material layer (223). Therein, the equilibrium potential Ea of the region (243a) facing the positive electrode active material layer (223) is higher than the equilibrium potential Eb of the regions (243b1), (243b2) not facing the positive electrode active material layer (223) (Ea>Eb). |
