@article{Zhou2023, 
author = {Rui Zhou and Yanru Yin and Hailu Dai and Xuan Yang and Yueyuan Gu and Lei Bi},
title = {Attempted preparation of La0.5Ba0.5MnO3−δ leading to an in-situ formation of manganate nanocomposites as a cathode for proton-conducting solid oxide fuel cells},
year = {2023},
journal = {Journal of Advanced Ceramics},
volume = {12},
number = {6},
pages = {1189-1200},
keywords = {nanocomposites, cathode, solid oxide fuel cells (SOFCs), proton conductor, La0.5Ba0.5MnO3−δ},
url = {https://www.sciopen.com/article/10.26599/JAC.2023.9220748},
doi = {10.26599/JAC.2023.9220748},
abstract = {A La0.5Ba0.5MnO3−δ oxide was prepared using the sol–gel technique. Instead of a pure phase, La0.5Ba0.5MnO3−δ was discovered to be a combination of La0.7Ba0.3MnO3−δ and BaMnO3. The in-situ production of La0.7Ba0.3MnO3−δ+BaMnO3 nanocomposites enhanced the oxygen vacancy (VO) formation compared to single-phase La0.7Ba0.3MnO3−δ or BaMnO3, providing potential benefits as a cathode for fuel cells. Subsequently, La0.7Ba0.3MnO3−δ+BaMnO3 nanocomposites were utilized as the cathode for proton-conducting solid oxide fuel cells (H-SOFCs), which significantly improved cell performance. At 700 ℃, H-SOFC with a La0.7Ba0.3MnO3−δ+BaMnO3 nanocomposite cathode achieved the highest power density (1504 mW·cm−2) yet recorded for H-SOFCs with manganate cathodes. This performance was much greater than that of single-phase La0.7Ba0.3MnO3−δ or BaMnO3 cathode cells. In addition, the cell demonstrated excellent working stability. First-principles calculations indicated that the La0.7Ba0.3MnO3−δ/BaMnO3 interface was crucial for the enhanced cathode performance. The oxygen reduction reaction (ORR) free energy barrier was significantly lower at the La0.7Ba0.3MnO3−δ/BaMnO3 interface than that at the La0.7Ba0.3MnO3−δ or BaMnO3 surfaces, which explained the origin of high performance and gave a guide for the construction of novel cathodes for H-SOFCs.}
}