Rare earth Nickelate electrodes containing heavily doped ceria for reversible solid oxide fuel cells.
In: Journal of Power Sources, Jg. 507 (2021-09-30), S. N.PAG
academicJournal
Zugriff:
The electrochemical performance of composite rare-earth nickelate-rare-earth doped ceria oxygen electrodes, with a high level of rare-earth doping in ceria are reported. Additionally, the chemical stability of these compositions is reported at both the sintering (1240 °C) and operating temperature (800 °C). Specifically, a lanthanum nickelate La 2 NiO 4+δ (LNO) −50 mol% lanthanum doped ceria (LDC50) oxygen electrode and a neodymium nickelate Nd 2 NiO 4+δ (NNO) −50 mol% neodymium doped ceria (NDC50) oxygen electrode are tested in solid oxide fuel cell (SOFC) and solid oxide electrolysis cell (SOEC) modes and compared to a composite (La 0.75 Sr 0.25) 0.95 MnO 3±δ (LSM)-8 mol% yttria stabilized zirconia (YSZ) electrode. The LNO–LDC50 oxygen electrode reaches a current density which is approximately three times that of the LSM-YSZ electrode in SOFC mode at 0.7 V and approximately two times the LSM-YSZ electrode at 1.2 V in SOEC mode. Similarly the NNO-NDC50 oxygen electrode reaches a current density which is approximately two times and approximately one and a half times that of LSM-YSZ at 0.7 V and 1.2 V respectively. Oxygen surface exchange results for LNO and NNO are also reported which show different oxygen exchange kinetics during oxidation versus reduction steps. • Rare-earth nickelate oxygen electrodes have been stabilized and are reversible. • Nickelates show equally good performance in SOFCs and SOECs. • Symmetrical cells provide corroboration of results from full cells. [ABSTRACT FROM AUTHOR]
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Rare earth Nickelate electrodes containing heavily doped ceria for reversible solid oxide fuel cells.
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Autor/in / Beteiligte Person: | Banner, Jane ; Akter, Ayesha ; Wang, Ruofan ; Pietras, John ; Sulekar, Soumitra ; Marina, Olga A. ; Gopalan, Srikanth |
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Zeitschrift: | Journal of Power Sources, Jg. 507 (2021-09-30), S. N.PAG |
Veröffentlichung: | 2021 |
Medientyp: | academicJournal |
ISSN: | 0378-7753 (print) |
DOI: | 10.1016/j.jpowsour.2021.230248 |
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