An electrode assembly comprising: a separator wound about a portion between ends of the separator so as to form a plurality of separator members (111a, 111b, 111c), wherein a central separator member from among the plurality of separator members comprises the portion; and a plurality of first (130a, 130b, 130c) and second (140a, 140b, 140c) electrode members positioned between each of the separator members (111a, 111b, 111c), and wherein both opposite ends (1111a, 1112a) of the central separator member are curved in opposite directions, respectively, and wherein each of the plurality of first (130a, 130b, 130c) and second (140a, 140b, 140c) electrode members comprises: an electrode collector and an electrode tab; and electrode active materials coated on both sides of the electrode collector; wherein the electrode tab of each of the first electrode members (130a, 130b, 130c) is respectively coupled to a first terminal, and wherein the electrode tab of each of the second electrode members (140a, 140b, 140c) is respectively coupled to a second terminal; wherein one of the plurality of the first electrode members is attached to a first side of the central separator member, and one of the plurality of the second electrode members is attached to a second side of the central separator member, and wherein the others of the first and second electrode members are attached to sides of other separator members that face the central separator member. a separator wound about a portion between ends of the separator so as to form a plurality of separator members (111a, 111b, 111c), wherein a central separator member from among the plurality of separator members comprises the portion; and a plurality of first (130a, 130b, 130c) and second (140a, 140b, 140c) electrode members positioned between each of the separator members (111a, 111b, 111c), and wherein both opposite ends (1111a, 1112a) of the central separator member are curved in opposite directions, respectively, and wherein each of the plurality of first (130a, 130b, 130c) and second (140a, 140b, 140c) electrode members comprises: an electrode collector and an electrode tab; and electrode active materials coated on both sides of the electrode collector; wherein the electrode tab of each of the first electrode members (130a, 130b, 130c) is respectively coupled to a first terminal, and wherein the electrode tab of each of the second electrode members (140a, 140b, 140c) is respectively coupled to a second terminal; wherein one of the plurality of the first electrode members is attached to a first side of the central separator member, and one of the plurality of the second electrode members is attached to a second side of the central separator member, and wherein the others of the first and second electrode members are attached to sides of other separator members that face the central separator member. an electrode collector and an electrode tab; and electrode active materials coated on both sides of the electrode collector; wherein the electrode tab of each of the first electrode members (130a, 130b, 130c) is respectively coupled to a first terminal, and wherein the electrode tab of each of the second electrode members (140a, 140b, 140c) is respectively coupled to a second terminal; wherein one of the plurality of the first electrode members is attached to a first side of the central separator member, and one of the plurality of the second electrode members is attached to a second side of the central separator member, and wherein the others of the first and second electrode members are attached to sides of other separator members that face the central separator member.