@article{Lv2026, 
author = {Na Lv and Yumei Ma and Lina Su and Ling Huang},
title = {A-site doping enabled synergistic regulation of phase transition and electron spin state for improved performance of La0.6Ca0.4FeO3−δ cathodes in solid oxide fuel cells},
year = {2026},
journal = {Nano Research},
volume = {19},
number = {1},
pages = {94908200},
keywords = {solid oxide fuel cells, oxygen reduction reaction (ORR), A-site modulation, spin state transition, La0.6Ca0.4FeO3−δ},
url = {https://www.sciopen.com/article/10.26599/NR.2025.94908200},
doi = {10.26599/NR.2025.94908200},
abstract = {Although intermediate temperature solid oxide fuel cells (IT-SOFCs) show great potential to address energy conversion challenges, the sluggish oxygen reduction reaction (ORR) kinetics of cathode materials has severely hindered extended applications. Herein, we have demonstrated that Bi3+ doping on the A-site synergistically regulates the phase transition and electron spin state in La0.3Bi0.3Ca0.4FeO3−δ (LBCF3) for improved performance. An orthorhombic to cubic phase transition occurred with Bi3+ doping increases oxygen vacancy concentration and thus increases oxygen ion migration capacity. Simultaneously, the change of Fe from low to medium electron spin state strengths O2 adsorption and improves catalytic performances. Consequently, a peak power density improvement up to 48% (from 1.21 to 1.79 W·cm−2) at 800 °C is realized in the anode-supported single cell using LBCF3 as cathode, which remains stable for over 270 h at 750 °C.}
}