High-nickel electrode sheet and method for manufacturing same

An electrode sheet including a positive electrode mixture layer including a non-coated part and a coated part, and disposed on at least one surface of a current collector,

• wherein the coated part includes:
• a first positive electrode mixture layer disposed on a central portion along a longitudinal direction of the electrode sheet and containing a first positive electrode active material including lithium-nickel-cobalt-manganese oxide;
• and
• a second positive electrode mixture layer disposed adjacent to one or two sides of the first positive electrode mixture layer in the longitudinal direction and containing a second positive electrode active material having a nickel content lower than a nickel content of the first positive electrode active material,
• wherein a rolling density (b) of the second positive electrode mixture layer is smaller than a rolling density (a) of the first positive electrode mixture layer.