METHOD OF REMOVING ONE-SIDED ELECTRODE LAYER FROM DOUBLE-SIDED ELECTRODE

A method for removing one electrode layer from a double-sided electrode to provide a single-sided electrode includes interposing the double-sided electrode between an upper plate and a lower plate, of which the upper plate has a structure in which an opening part communicates between upper and lower sides of the upper plate and the lower plate has a structure in which one side is opened and an opposite side is formed with a hermetically sealed depression part, coupling the coupling the upper plate and the lower plate to each other with the double-sided electrode interposed therebetween to form a plate assembly, placing the plate assembly in an N-methyl-2-pyrrolidone (NMP) water bath, and applying ultrasonic waves to remove the one electrode layer.