리튬 이온이 용해된 전해조에, 집전체 상에 제1 음극층이 배치된 음극 기판을 침지하고, 전류를 흘려준다.
A cathode substrate on which a first cathode layer is placed on a current collector is immersed in an electrolytic cell in which lithium ions are dissolved, and an electric current is passed.