Electrode sheet and secondary battery

A secondary battery constituted by winding a laminated sheet obtained by sandwiching a separator between a positive electrode sheet and a negative electrode sheet, each of which has a longitudinal direction and a lateral direction with the lateral direction as an axial direction,

• wherein the positive electrode sheet includes a positive electrode-side current collector that includes a positive electrode-side resin layer, and a first positive electrode-side current collecting layer and a second positive electrode-side current collecting layer that are respectively provided on both surfaces of the positive electrode-side resin layer,
• a positive electrode active material layer that is provided on a surface of the first positive electrode-side current collecting layer on a side opposite to the positive electrode-side resin layer, and
• a positive electrode-side metal sheet that is bonded to one end of the first positive electrode-side current collecting layer in the lateral direction and has a first bonding mark formed along the longitudinal direction by the bonding, where the positive electrode-side metal sheet has a positive electrode-side extending part that extends from the first positive electrode-side current collecting layer in the lateral direction;
• the negative electrode sheet includes a negative electrode-side current collector that includes a negative electrode-side resin layer, and a first negative electrode-side current collecting layer and a second negative electrode-side current collecting layer that are respectively provided on both surfaces of the negative electrode-side resin layer,
• a negative electrode active material layer that is provided on a surface of the first negative electrode-side current collecting layer on a side opposite to the negative electrode-side resin layer, and
• a negative electrode-side metal sheet that is bonded to one end of the first negative electrode-side current collecting layer in the lateral direction and has a negative electrode-side bonding mark formed along the longitudinal direction by the bonding, where the negative electrode-side metal sheet has a negative electrode-side extending part that extends from the first negative electrode-side current collecting layer in the lateral direction;
• and
• the separator is provided between the positive electrode active material layer and the negative electrode active material layer.