Solid-state electrolytes that operate at a temperature of 300 °C suffer from a H+ concentration–conductivity trade-off. Here heavy Sc doping of cubic perovskites is shown to bypass this trade-off, enabling a proton conductivity of 0.01 S cm−1 that arises from rapid proton diffusion along ScO6 octahedra.
- Kota Tsujikawa
- Junji Hyodo
- Yoshihiro Yamazaki
