최종 20 cycle 운전한 경우의 전압 상승 폭은 0.61 V로 초기 전압 대비 26%로 상승하여 급격한 성능 저하가 관찰되었다.
When the last 20 cycles were operated, the voltage rise range was 0.61 V, which was increased to 26% compared to the initial voltage, and a rapid performance decline was observed.