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Triple Perovskite $Nd_{1.5}Ba_{1.5}CoFeMnO_{9−δ}-Sm_{0.2}Ce_{0.8}O_{1.9}$ Composite as Cathodes for the Intermediate Temperature Solid Oxide Fuel Cells
| Content Provider | MDPI |
|---|---|
| Author | Chen, Yunru Yu, Tao Jin, Jiang Zhang, Hua |
| Copyright Year | 2022 |
| Abstract | Triple perovskite has been recently developed for the intermediate temperature solid oxide fuel cell (IT-SOFC). The performance of Nd1.5Ba1.5CoFeMnO9−δ (NBCFM) cathodes for IT-SOFC is investigated in this work. The interfacial polarization resistance (RP) of NBCFM is 1.1273 Ω cm2~0.1587 Ω cm2 in the range of 700–800 °C, showing good electrochemical performance. The linear thermal expansion coefficient of NBCFM is 17.40 × 10−6 K−1 at 40–800 °C, which is significantly higher than that of the electrolyte. In order to further improve the electrochemical performance and reduce the thermal expansion coefficient (TEC) of NBCFM, Ce0.8Sm0.2O2−δ (SDC) is mixed with NBCFM to prepare an NBCFM-xSDC composite cathode (x = 0, 10, 20, 30, 40 wt.%). The thermal expansion coefficient decreases monotonically from 17.40 × 10−6 K−1 to 15.25 × 10−6 K−1. The surface oxygen exchange coefficient of NBCFM-xSDC at a given temperature increases from 10−4 to 10−3 cm s−1 over the |
| Starting Page | 3663 |
| e-ISSN | 19961944 |
| DOI | 10.3390/ma15103663 |
| Journal | Materials |
| Issue Number | 10 |
| Volume Number | 15 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2022-05-20 |
| Access Restriction | Open |
| Subject Keyword | Materials Energy and Fuel Technology Triple Perovskite Structure Composite Cathode Electrochemical Performance Thermal Expansion |
| Content Type | Text |
| Resource Type | Article |
