Electrode assembly having negative electrode disposed as outermost electrode, and lithium-ion secondary battery having same

An electrode assembly, comprising:

• a plurality of electrodes including a pair of electrodes having different polarities with a separator interposed therebetween;
• at least two electrodes among the plurality of electrodes include an electrode lead connection tab, and
• a width of each of the electrode lead connection tabs is equal to a width of the electrode or larger than ½ of the width of the electrode,
• wherein the electrode lead connection tabs are arranged at one end of the electrode assembly in a same direction,
• wherein electrode leads connected to the electrode lead connection tabs are not overlapped, and
• wherein the plurality of electrodes includes electrode parallel connection tabs, which are arranged at an end of the electrode assembly opposite the electrode lead connection tab, that connect the plurality of electrodes with same polarity,
• wherein the electrode lead connection tabs are provided at a side opposite to the electrode parallel connection tabs and inside of the separator, and
• wherein a tab-lead joint portion having a structure in which the electrode lead connection tab and an electrode lead are joined is located inside the separator.