La2NiO4+? as oxygen electrode in reversible solid oxide cells
By Young-Sung Yoo and Mihwa Choi and Jin-Ha Hwang and Ha-Ni Im and Bhupendra Singh and Sun-Ju Song
Published in Ceramics International
NULL
2015
Abstract
The delamination of oxygen electrode during the electrolysis mode operation, which is mainly attributed to interfacial stress arising from the inability of oxygen electrode to accommodate oxygen species transported by oxide ion conducting electrolyte at the three phase boundary (TPB), has been major concern in the development of reversible solid oxide cell (RSOC) systems. The use of lanthanum nickelate, La2NiO4+? (LNO) as a \RSOC\ oxygen electrode, because of its ability to accommodate excess oxygen species in interstitial positions, can be helpful in reliving such interfacial stresses and thus mitigating the problem of delamination. In this work, the possibility of using \LNO\ as an oxygen electrode in \RSOCs\ is examined. The button cells with 10% gadolinium doped ceria (GDC10) electrolyte, Ni-GDC10 fuel electrode and \LNO\ oxygen electrode are fabricated and their current
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