| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1272619 | International Journal of Hydrogen Energy | 2014 | 6 Pages |
•Ruddlesden–Popper nickelate, La2NiO4+δ, is used as protective coating for metallic interconnect of SOFC•This material absorbs the Cr species to form La(Ni,Cr)O3 perovskite.•No spalling is observed during the phase transition and the ASR of the interconnect is 2.5 mΩ cm2.
A Ruddlesden–Popper nickelate, La2NiO4+δ (LN), is examined as a coating material for metallic interconnects of a solid oxide fuel cell (SOFC) operating at intermediate temperatures. Isothermal oxidation of the coated and uncoated SS430 alloy with and without pre-annealing at 850 °C in air suggests that the coating reduces significantly the oxidation rate and impact of thermal cycle on the integrity of the scale. After an annealing in air at 850 °C for 50 h, the LN coating has turned into to La(Cr,Ni)O3 (LCN) perovskite, but no spalling is observed because of the matching thermal expansion of LN and LCN to SS430. A low area specific resistance (ASR) of 2.5 × 10−3 Ω cm2 is observed for the sample with the resultant LCN coating, indicating LN can be a good candidate as a coating for interconnects of SOFC.
Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slide
