A stacked/folded type electrode assembly configured to have a structure in which a plurality of unit cells (210, 220, 230, 240, 250, 260, 270, 280), each of which comprises a positive electrode having an electrode mixture comprising an electrode active material applied to a current collector, a negative electrode having an electrode mixture comprising an electrode active material applied to a current collector, and a separator disposed between the positive electrode and the negative electrode, is wound in a state of being arranged on a sheet type separation film, wherein the unit cells comprise one full cell and three or more bi-cells, outermost unit cells of the electrode assembly are each configured such that an electrode forming an outside of the electrode assembly is configured as a single-sided electrode, in which no electrode mixture is applied to a surface of the current collector facing the outside of the electrode assembly, and the single-sided electrodes are electrodes having the same polarity, characterized in that the unit cells are wound in a state in which the unit cells are sequentially arranged in a plane from a first unit cell, which is located at a winding start point of the separation film, to a 2n-th unit cell where n is an integer that satisfies 2 ≤ n ≤ 20, which is located at a winding end point of the separation film, the full cell is a first full cell, which is configured to have a structure in which a first positive electrode, configured as a single-sided positive electrode, a separator, and a negative electrode are sequentially stacked, or a second full cell, which is configured to have a structure in which a first negative electrode, configured as a single-sided negative electrode, a separator, and a positive electrode are sequentially stacked, the first positive electrode or the first negative electrode facing the separation film, each of the bi-cells is an A-type bi-cell, which is configured to have a structure in which a positive electrode, a negative electrode, and another positive electrode are sequentially stacked in a state in which separators are disposed therebetween, or a C-type bi-cell, which is configured to have a structure in which a negative electrode, a positive electrode, and another negative electrode are sequentially stacked in a state in which separators are disposed therebetween, wherein the A-type bi-cell comprises a 1A-type bi-cell, which is configured to have a structure in which a first positive electrode, configured as a single-sided positive electrode, a negative electrode, and a positive electrode are sequentially stacked in a state in which separators are disposed therebetween, or a 2A-type bi-cell, which is configured to have a structure in which a positive electrode, a negative electrode, and another positive electrode are sequentially stacked in a state in which separators are disposed therebetween, wherein the C-type bi-cell comprises a 1C-type bi-cell, which is configured to have a structure in which a first negative electrode, configured as a single-sided negative electrode, a positive electrode, and a negative electrode are sequentially stacked in a state in which separators are disposed therebetween, or a 2C-type bi-cell, which is configured to have a structure in which a negative electrode, a positive electrode, and another negative electrode are sequentially stacked in a state in which separators are disposed therebetween, and the first unit cell is a bi-cell, the 2n-th unit cell or (2n-1)-th unit cell is the full cell.