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According to an embodiment of the present invention, a windable electrode assembly comprises : a negative electrode and a positive electrode respectively comprising a base material and a first laminate and a second laminate which are respectively formed on both sides of the base material; and a separator positioned between the positive electrode and the negative electrode. The first laminate of the negative electrode is located relatively farther from the center of the electrode assembly than the second laminate of the positive electrode, and the first laminate in the negative electrode is oriented with respect to one surface of the base material of the negative electrode.COPYRIGHT KIPO 2018