Jingzeng Cui, Yuxuan Zhang, Zhiwei Hu, Chang-Yang Kuo, Chun-Fu Chang, Yu-Chieh Ku, Ze Liu, Ziting Xia, Jianqiu Zhu, Jichao Zhang, Yan He, Jingyuan Ma, Aiguo Li, Xiao Lin, Chien-Te Chen, Guntae Kim, Jian-Qiang Wang, Linjuan Zhang
Reversible solid oxide cells (rSOCs) have significant potential as efficient energy conversion and storage systems. Nevertheless, the practical application of their conventional air electrodes, such as La0.8 Sr0.2 MnO3-δ (LSM), Ba0.5 Sr0.5 Co0.8 Fe0.2 O3-δ (BSCF), and PrBa0.8 Ca0.2 Co2 O5+δ (PBCC), remains unsatisfactory due to interface delamination during prolonged electrochemical operation. Using micro-focusing X-ray absorption spectroscopy (µ-XAS), a decrease (increase) in the co-valence state from the electrode surface to the electrode/electrolyte interface is observed, leading to the above delamination...
April 30, 2024: Small Methods