 The study proposes a triple conducting hybrid electrode for reversible proton ceramic electrochemical cells, which shows excellent electrochemical performance with a current density of 3.73 ACM2 at 1.3V in electrolysis mode and a peak power density of 1.99 WCM2 in fuel cell mode at 650 degree Celsius, by adjusting the stomachemetric ratio of the A-site to achieve strong interactions between hybrid phases and efficiently modifies the phase contents. This article was authored by Zwatching Liu, Yuxing Bai, Hainan Sun, and others.