ELECTRODE AND SECONDARY BATTERY INCLUDING SAME AND METHOD OF MANUFACTURING AN ELECTRODE

An electrode includes: an insulating layer having a through hole; a first metal layer on one surface of the insulating layer; a second metal layer on another surface of the insulating layer; a first active material layer on the first metal layer; a second active material layer on the second metal layer; and a connecting metal layer in the through hole, and electrically connecting the first metal layer to the second metal layer.