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La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3− δ –Ba(Ce,Co,Y)O 3− δ Composite Cathodes for Proton-conducting Ceramic Fuel Cells
| Content Provider | Semantic Scholar |
|---|---|
| Author | Miyazaki, Kazunari Ding, Yidan Muroyama, Hiroki Matsui, Toshiaki Eguchi, Koichi |
| Copyright Year | 2020 |
| Abstract | In this study, the applicability of Ba(Ce,Co,Y)O3−δ (BCCY) for a cathode of proton-conducting ceramic fuel cells was investigated. The electrical conductivity and transference number of BCCY were significantly affected by a cobalt content in the oxide. It was found that this material showed a mixed conduction of proton, oxide ion, and electron. The addition of cobalt into Ba(Ce,Y)O3−δ mainly increased the electronic conductivity of materials. Composite electrodes with an optimum composition of La0.6Sr0.4Co0.2Fe0.8O3−δ (LSCF)–BaCe0.7Co0.2Y0.1O3−δ (50:50wt.%) exhibited lower polarization for the symmetrical cell test with a BaCe0.8Y0.2O3−δ electrolyte in 6.5% humidified oxygen atmosphere, as compared with La0.6Sr0.4Co0.2Fe0.8O3−δ (LSCF) itself and LSCF–BaCe0.9Y0.1O3−δ (50:50 wt.%) composite electrodes. The power generation test was performed at 600°C–700°C using a BaCe0.8Y0.2O3−δ electrolyte-supported single cell employing a LSCF–BaCe0.7Co0.2Y0.1O3−δ (50:50wt.%) composite cathode, upon feeding 3% humidified hydrogen and pure oxygen to the anode and cathode, respectively. The cell with a LSCF– BaCe0.7Co0.2Y0.1O3−δ (50:50wt.%) composite cathode exhibited much higher performance than that with a LSCF electrode. Consequently, the introduction of cobalt into Ba(Ce,Y)O3−δ was an effective strategy for an improvement in an oxygen reduction reaction activity of a cathode material. © The Electrochemical Society of Japan, All rights reserved. |
| Starting Page | 28 |
| Ending Page | 33 |
| Page Count | 6 |
| File Format | PDF HTM / HTML |
| DOI | 10.5796/electrochemistry.19-00039 |
| Volume Number | 88 |
| Alternate Webpage(s) | https://www.jstage.jst.go.jp/article/electrochemistry/88/1/88_19-00039/_pdf/-char/en |
| Alternate Webpage(s) | https://doi.org/10.5796/electrochemistry.19-00039 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
