CURRENT COLLECTOR, SECONDARY BATTERY, ELECTRONIC DEVICE, AND MANUFACTURING METHOD THEREOF

摘要

An object is to provide a secondary battery suitable for a wearable device. Another object is to provide a novel power storage device. Part of an electrode, specifically a current collector and an active material layer, for a secondary battery is subjected to cutting processing to have a complex shape. This suppresses the positional shift of an end portion of an electrode far from a curvature center from an electrode close to the curvature center due to the larger degree of bending of the electrode far from the curvature center than that of the electrode close to the curvature center, or relieves tension to be applied to the electrode far from the curvature center.

主权项

1. An electrode comprising:
a current collector; an active material layer over the current collector; and a first slit passing the current collector and the active material layer, the first slit extending to an edge of each of the current collector and the active material layer.