Electrode assembly and secondary battery comprising electrode assembly

An electrode assembly accommodated in an exterior material, the electrode assembly comprising:

• a positive electrode, the positive electrode comprising a positive electrode substrate and a positive active material layer 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 in an outermost area of the electrode assembly,
• the positive electrode substrate comprises a first surface and a second surface opposite to the first surface,
• the first surface comprises a first coated portion on which the positive active material layer is located and a first uncoated portion free from the positive active material layer,
• the second surface has a second coated portion on which the positive active material layer is located and a 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 and is on an outermost surface of the electrode assembly;
• and
• at the outermost area of the electrode assembly, the first uncoated portion comprises a first curved portion and a first straight portion and the first ceramic coating layer is directly on the first uncoated portion at both the first curved portion and the first straight portion.