In situ formation of a 3D core-shell and triple-conducting oxygen reduction reaction electrode for proton-conducting SOFCs
BaZr x Ce y Y 1-x-y O 3-δ are recognized proton-conducting electrolyte materials for proton-conducting solid oxide fuel cells (H + -SOFCs) below 650 °C. Here Co cations are incorporated into the BaZr 0.4 Ce 0.4 Y 0.2 O 3-δ (BZCY) scaffold to generate a 3D core-shell and triple-conducting (H + /O...
| Main Authors: | , , , , , |
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| Format: | Journal Article |
| Published: |
Elsevier SA
2018
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| Online Access: | http://hdl.handle.net/20.500.11937/67757 |
| _version_ | 1848761649595416576 |
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| author | Zhang, Z. Wang, J. Chen, Y. Tan, S. Shao, Zongping Chen, D. |
| author_facet | Zhang, Z. Wang, J. Chen, Y. Tan, S. Shao, Zongping Chen, D. |
| author_sort | Zhang, Z. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | BaZr x Ce y Y 1-x-y O 3-δ are recognized proton-conducting electrolyte materials for proton-conducting solid oxide fuel cells (H + -SOFCs) below 650 °C. Here Co cations are incorporated into the BaZr 0.4 Ce 0.4 Y 0.2 O 3-δ (BZCY) scaffold to generate a 3D core-shell and triple-conducting (H + /O 2− /e − ) electrode in situ via infiltrating and reactive sintering. The core is the bulk BZCY scaffold, while the shell is composed of the cubic Ba(Zr 0.4 Ce 0.4 Y 0.2 ) 1-x Co x O 3-δ , cubic spinel Co 3 O 4 and cubic fluorite (Ce, Zr, Y)O 2 . The obtained electrode exhibits an excellent compatibility with the BZCY electrolyte, and performs well in yielding a low and stable polarization resistance for oxygen reduction reaction for intermediate-temperature H + -SOFCs. In particular, it achieves polarization resistances as low as 0.094 and 0.198 Ω cm 2 at 650 and 600 °C in wet air (3% H 2 O) when the sintering temperature for the electrode is 900 °C. In addition, a symmetrical cell also exhibits operation stability of 70 h at 650 °C. Furthermore, a fuel cell assembled with the 3D core-shell and triple-conducting electrode delivers a peak power density of ∼330 mW cm −2 at 650 °C. The substantially improved electrochemical performance and high stability are ascribed to the unique core-shell structure and the formation of Ba(Zr 0.4 Ce 0.4 Y 0.2 ) 1-x Co x O 3-δ in the shell. |
| first_indexed | 2025-11-14T10:35:02Z |
| format | Journal Article |
| id | curtin-20.500.11937-67757 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T10:35:02Z |
| publishDate | 2018 |
| publisher | Elsevier SA |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-677572020-06-15T03:12:16Z In situ formation of a 3D core-shell and triple-conducting oxygen reduction reaction electrode for proton-conducting SOFCs Zhang, Z. Wang, J. Chen, Y. Tan, S. Shao, Zongping Chen, D. BaZr x Ce y Y 1-x-y O 3-δ are recognized proton-conducting electrolyte materials for proton-conducting solid oxide fuel cells (H + -SOFCs) below 650 °C. Here Co cations are incorporated into the BaZr 0.4 Ce 0.4 Y 0.2 O 3-δ (BZCY) scaffold to generate a 3D core-shell and triple-conducting (H + /O 2− /e − ) electrode in situ via infiltrating and reactive sintering. The core is the bulk BZCY scaffold, while the shell is composed of the cubic Ba(Zr 0.4 Ce 0.4 Y 0.2 ) 1-x Co x O 3-δ , cubic spinel Co 3 O 4 and cubic fluorite (Ce, Zr, Y)O 2 . The obtained electrode exhibits an excellent compatibility with the BZCY electrolyte, and performs well in yielding a low and stable polarization resistance for oxygen reduction reaction for intermediate-temperature H + -SOFCs. In particular, it achieves polarization resistances as low as 0.094 and 0.198 Ω cm 2 at 650 and 600 °C in wet air (3% H 2 O) when the sintering temperature for the electrode is 900 °C. In addition, a symmetrical cell also exhibits operation stability of 70 h at 650 °C. Furthermore, a fuel cell assembled with the 3D core-shell and triple-conducting electrode delivers a peak power density of ∼330 mW cm −2 at 650 °C. The substantially improved electrochemical performance and high stability are ascribed to the unique core-shell structure and the formation of Ba(Zr 0.4 Ce 0.4 Y 0.2 ) 1-x Co x O 3-δ in the shell. 2018 Journal Article http://hdl.handle.net/20.500.11937/67757 10.1016/j.jpowsour.2018.03.029 Elsevier SA restricted |
| spellingShingle | Zhang, Z. Wang, J. Chen, Y. Tan, S. Shao, Zongping Chen, D. In situ formation of a 3D core-shell and triple-conducting oxygen reduction reaction electrode for proton-conducting SOFCs |
| title | In situ formation of a 3D core-shell and triple-conducting oxygen reduction reaction electrode for proton-conducting SOFCs |
| title_full | In situ formation of a 3D core-shell and triple-conducting oxygen reduction reaction electrode for proton-conducting SOFCs |
| title_fullStr | In situ formation of a 3D core-shell and triple-conducting oxygen reduction reaction electrode for proton-conducting SOFCs |
| title_full_unstemmed | In situ formation of a 3D core-shell and triple-conducting oxygen reduction reaction electrode for proton-conducting SOFCs |
| title_short | In situ formation of a 3D core-shell and triple-conducting oxygen reduction reaction electrode for proton-conducting SOFCs |
| title_sort | in situ formation of a 3d core-shell and triple-conducting oxygen reduction reaction electrode for proton-conducting sofcs |
| url | http://hdl.handle.net/20.500.11937/67757 |