Operando observations of active three phase boundary of patterned nickel - Yttria stabilized zirconia electrode in solid oxide cell
نویسندگان
چکیده
In solid oxide fuel cells (SOFCs) and electrolysis (SOECs), the substantial performance degradation of nickel (Ni) - yttria-stabilized zirconia (YSZ) electrode has been a growing challenge for commercialization. The microstructure Ni-YSZ is not stable during long-term operation due to Ni phase redistribution. present study, operando observations patterned film electrodes under SOFC, SOEC reversible cell (RSOC) modes are conducted. Confocal laser scanning microscopy applied acquire real-time images three boundary (TPB) study mobility on YSZ surface. observation showed that dynamically spreads splits up only SOFC mode, while this phenomenon observed mode. coarsening occurs regardless dynamic motion active TPB qualitatively correlates with variation in current density operation. contact angles flat surface after smallest followed by RSOC largest SOEC. Competition between altered wettability agglomeration finally determines complicated morphological changes.
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ژورنال
عنوان ژورنال: Journal of Power Sources
سال: 2022
ISSN: ['1873-2755', '0378-7753']
DOI: https://doi.org/10.1016/j.jpowsour.2022.231228