Electrode assembly and secondary battery comprising electrode assembly

An electrode accommodated in an exterior material includes a positive electrode, the positive electrode including a positive electrode substrate and a positive active material layer disposed on both sides of the positive electrode substrate, a negative electrode, and a separator between the positive electrode and the negative electrode, wherein the positive electrode is at an outermost side of the electrode assembly, the positive electrode substrate includes a first surface and a second surface opposite to the first surface, the first surface and the second surface include, respectively, a first or second coated portion on which the positive active material layer is located and a first or second uncoated portion free from the positive active material layer, a first ceramic coating layer is on the first uncoated portion and a second ceramic coating layer is on the second uncoated portion, and the first ceramic coating layer directly faces the exterior material.