Lithium-ion battery including electrode with tab section having substrate-exposed portion

A lithium-ion battery comprising an electrode assembly including a first electrode and a second electrode, wherein:

• the first electrode includes a substrate, a first active material layer formed on a surface of the substrate, and a first tab section having a substrate-exposed portion in which the first active material layer is not formed on the surface;
• the first active material layer has one or more notches in an end of the first active material layer;
• and
• an outer edge of the notches encloses an end of a boundary where the first tab section and the first active material layer come into contact,
• wherein
• in the electrode assembly, a terminal edge of the notches on a side of the first tab section is placed at a position that does not overlap a second active material layer of the second electrode when viewed from a stacking direction of the first electrode and the second electrode.