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| Home > Publications database > Performances of Solid Oxide Cells with La 0.97 Ni 0.5 Co 0.5 O 3− δ as Air-Electrodes |
| Home > Publications database > Performances of Solid Oxide Cells with La 0.97 Ni 0.5 Co 0.5 O 3− δ as Air-Electrodes |
| Journal Article | FZJ-2020-02164 |
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2020
IOP Publishing
Bristol
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Please use a persistent id in citations: http://hdl.handle.net/2128/25038 doi:10.1149/1945-7111/ab91cc
Abstract: Based on previous studies of perovskites in the quasi-ternary system LaFeO3–LaCoO3–LaNiO3, La0.97Ni0.5Co0.5O3 (LNC) ischosen as the most promising air-electrode material in the series for solid oxide cells (SOCs). The properties of the material itselfhave been investigated in detail. However, the evaluation of LNC97 air electrodes in practical SOCs is still at a very early stage. Inthe present study, SOCs were prepared based on LNC97 air electrodes. The I-U performance of the SOCs in both solid oxide fuelcell (SOFC) and solid oxide electrolysis cell (SOEC) modes, i.e. reversible SOCs (r-SOCs), was investigated systematically fordifferent air-electrode designs, temperatures and fuel gases. In general, the performance of the r-SOCs tested in the present study ishigher than the published results of other LaFeO3–LaCoO3–LaNiO3-based SOCs and is comparable to or even better than state-ofthe-art La1−xSrxFe1−yCoyO3 (LSCF)-based SOCs. Mid-term operation of about 1000 h for SOCs in both SOFC and SOEC modesprimarily proved the stability of LNC97-based air electrodes. Impedance spectra were systematically applied to understand thepolarization processes of the SOCs.
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