SECONDARY BATTERY CURRENT COLLECTOR AND MANUFACTURING METHOD FOR SAME, AND SECONDARY BATTERY

The secondary battery current collector disclosed herein includes a resin layer, a first metal layer covering one main surface of the resin layer, and a second metal layer covering the other main surface of the resin layer. Each of the first metal layer and the second metal layer extend beyond an external side of the main surface of the resin layer. The secondary battery current collector has a resin-laminated part, in which the first metal layer, the resin layer, and the second metal layer are laminated; and a metal-laminated part, in which the first metal layer and the second metal layer are overlaid, on an external side of the resin-laminated part. A thickness of the metal-laminated part is greater than a total thickness of the first metal layer and the second metal layer in the thickest portion of the resin-laminated part.