Electrode assembly and secondary battery including the same

The invention relates to an electrode assembly for a secondary battery which reduces the swelling of the battery. The electrode assembly according to the invention comprises a positive electrode (110) having a positive electrode coating portion (112) on at least one surface thereof, a negative electrode (120) having a negative electrode coating portion (122) including lithium titanium oxide on at least one surface thereof, and a separator (130) disposed between the positive electrode and the negative electrode, wherein the area of the positive electrode coating portion is larger than that of the negative electrode coating portion. This arrangement means that all of the lithium titanium oxide coated on the negative electrode participates in the charge/discharge operations, thereby reducing the reaction between the lithium titanium oxide and electrolyte and the resultant generation of gas.