Secondary battery

An electrode assembly for a secondary battery comprising a first electrode having a first active material coated part and a first uncoated part that is not coated with active material, a second electrode having a second active material coated part and a second uncoated part that is not coated with active material, a separator between the first and second electrodes and a ceramic layer on the first uncoated part in a region that corresponds to the second active material coated part.