Electrode assembly, and secondary battery comprising electrode assembly

Abstract

An electrode assembly includes a first electrode, a second electrode, and a separator between the first electrode and the second electrode, the first electrode, the separator, and the second electrode being wound in a jelly-roll shape, and a first electrode tab, wherein the first electrode includes a first coated portion coated with a first electrode active material on a first substrate, and a first uncoated portion on the first substrate, on one side of the first coated portion, and free of the first electrode active material, wherein the first electrode tab is on the first uncoated portion of the first electrode, and wherein the first electrode further includes a first buffer portion on an outermost region of the electrode assembly and extendible along at least one of a winding direction of the electrode assembly and an opposite direction thereof.

Dependencies are inferred from the claim text.