@article{HU2022, 
author = {Xingguo HU and Limin LIU and Xinyuan QIAN and Feifan HE and Zhou WANG and Hanyu CHEN and Yang SHENG and Xiaoliang ZHOU},
title = {Electrochemical Properties of Fe/Mn Doped CeO2 Impregnation Modified Ni-YSZ Electrode for High Temperature Solid Oxide Cells},
year = {2022},
journal = {Journal of Ceramics},
volume = {43},
number = {3},
pages = {401-411},
keywords = {SOCs, Ni-YSZ electrode, transition metal, CeO2, impregnation modified},
url = {https://www.sciopen.com/article/10.13957/j.cnki.tcxb.2022.03.005},
doi = {10.13957/j.cnki.tcxb.2022.03.005},
abstract = {Solid oxide cells (SOCs) with Ni-YSZ fuel electrodes were prepared by using cast-screen printing method. Highly catalytically active materials, including Ce0.9Fe0.1O2−δ (CFO), Ce0.9Mn0.1O2−δ (CMO) and Ce0.6Fe0.1Mn0.3O2−δ (CFM), were prepared by using Fe/Mn doped CeO2, which were then impregnated to modify the Ni-YSZ electrodes. Microstructure, properties and stability of the electrodes after impregnation modification were studied, with electrochemical tests combined with analytical characterization methods, such as scanning electron microscopy (SEM), X-ray diffractometer (XRD) and energy spectrometer. The highest power densities of the unimpregnated, CFO, CMO and CFM impregnation modified Ni-YSZ electrodes in H2 (3 vol.% H2O) at 850 ℃ were 526 mW·cm−2, 724 mW·cm−2, 706 mW·cm−2 and 829 mW·cm−2, respectively, while the electrolytic current densities in VCO2:VCO=50:50 at 850 ℃ at 1.8 V were 0.55 A·cm−2, 1.39 A·cm−2, 1.43 A·cm−2 and 1.63 A·cm−2, respectively. Obviously, the performance was significantly improved after the impregnation modification, with CFM to be the best modification agent. The CFM-impregnated Ni-YSZ electrode was characterized by using CO2 electrolytic stability test and EDS element content analysis. The decay rate was only 3.7% after testing for 100 h and the C content was almost unchanged before and after the testing, indicating that the CFM-impregnated Ni-YSZ electrode has high stability and can suppress the generation of carbon deposition. Therefore, CFO, CMO, and CFM are promising impregnation modifiers to extend the length of the three-phase boundary (TPB), optimize the microstructure and improve catalytic activity and stability of the Ni-YSZ electrode.}
}