Nanostructured (Ba,Sr)(Co,Fe)O3-δ impregnated (La,Sr)mnO3 cathodes for intermediate-temperature solid oxide fuel cells
A nanostructured cathode is fabricated by incorporating a mixed ionic and electronic conducting (MIEC) perovskite, Ba0.5Sr0.5Co0.8Fe0.2O3−δ (BSCF), via ion impregnation into the most common, highly electronic conducting, and structurally stable La0.8Sr0.2MnO3−δ (LSM) porous cathode skeleton. The int...
| Main Authors: | , , , , |
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| Format: | Journal Article |
| Published: |
The Electrochemical Society, Inc
2010
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| Online Access: | http://hdl.handle.net/20.500.11937/15588 |
| _version_ | 1848748934070009856 |
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| author | Ai, Na Jiang, San Ping Lü, Z. Chen, Kongfa Su, W. |
| author_facet | Ai, Na Jiang, San Ping Lü, Z. Chen, Kongfa Su, W. |
| author_sort | Ai, Na |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | A nanostructured cathode is fabricated by incorporating a mixed ionic and electronic conducting (MIEC) perovskite, Ba0.5Sr0.5Co0.8Fe0.2O3−δ (BSCF), via ion impregnation into the most common, highly electronic conducting, and structurally stable La0.8Sr0.2MnO3−δ (LSM) porous cathode skeleton. The introduction of nanosized MIEC BSCF particles significantly improves the electrocatalytic activity of the LSM for the oxygen reduction reaction of solid oxide fuel cells at an intermediate temperature range of 600–800°C . The electrode polarization resistance of a 1.8mgcm−2 BSCF-impregnated LSM cathode is 0.18Ωcm2 at 800°C , which is ~12 times lower than that of pure LSM. A single cell with an yttria-stabilized zirconia (YSZ) electrolyte film and the nanostructured BSCF/LSM cathode exhibits maximum power densities of 1.21 and 0.32Wcm−2 at 800 and 650°C, respectively. The atomic force microscopy (AFM) studies of the electrode/electrolyte interface before and after polarization indicate that the impregnation of BSCF extends the three-phase boundary area for the oxygen reduction reaction from the electrode/electrolyte interface to the electrode bulk. The formation of a second phase was also observed by AFM for the BSCF-impregnated LSM after being heat-treated at 800°C though its phase could not be identified due to the extremely small amount of the second phase particles on the YSZ electrolyte surface. The initial structure and polarization performance stability of the nanostructured BSCF-impregnated LSM composite cathodes are also investigated. |
| first_indexed | 2025-11-14T07:12:55Z |
| format | Journal Article |
| id | curtin-20.500.11937-15588 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:12:55Z |
| publishDate | 2010 |
| publisher | The Electrochemical Society, Inc |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-155882017-09-13T13:40:20Z Nanostructured (Ba,Sr)(Co,Fe)O3-δ impregnated (La,Sr)mnO3 cathodes for intermediate-temperature solid oxide fuel cells Ai, Na Jiang, San Ping Lü, Z. Chen, Kongfa Su, W. A nanostructured cathode is fabricated by incorporating a mixed ionic and electronic conducting (MIEC) perovskite, Ba0.5Sr0.5Co0.8Fe0.2O3−δ (BSCF), via ion impregnation into the most common, highly electronic conducting, and structurally stable La0.8Sr0.2MnO3−δ (LSM) porous cathode skeleton. The introduction of nanosized MIEC BSCF particles significantly improves the electrocatalytic activity of the LSM for the oxygen reduction reaction of solid oxide fuel cells at an intermediate temperature range of 600–800°C . The electrode polarization resistance of a 1.8mgcm−2 BSCF-impregnated LSM cathode is 0.18Ωcm2 at 800°C , which is ~12 times lower than that of pure LSM. A single cell with an yttria-stabilized zirconia (YSZ) electrolyte film and the nanostructured BSCF/LSM cathode exhibits maximum power densities of 1.21 and 0.32Wcm−2 at 800 and 650°C, respectively. The atomic force microscopy (AFM) studies of the electrode/electrolyte interface before and after polarization indicate that the impregnation of BSCF extends the three-phase boundary area for the oxygen reduction reaction from the electrode/electrolyte interface to the electrode bulk. The formation of a second phase was also observed by AFM for the BSCF-impregnated LSM after being heat-treated at 800°C though its phase could not be identified due to the extremely small amount of the second phase particles on the YSZ electrolyte surface. The initial structure and polarization performance stability of the nanostructured BSCF-impregnated LSM composite cathodes are also investigated. 2010 Journal Article http://hdl.handle.net/20.500.11937/15588 10.1149/1.3428366 The Electrochemical Society, Inc restricted |
| spellingShingle | Ai, Na Jiang, San Ping Lü, Z. Chen, Kongfa Su, W. Nanostructured (Ba,Sr)(Co,Fe)O3-δ impregnated (La,Sr)mnO3 cathodes for intermediate-temperature solid oxide fuel cells |
| title | Nanostructured (Ba,Sr)(Co,Fe)O3-δ impregnated (La,Sr)mnO3 cathodes for intermediate-temperature solid oxide fuel cells |
| title_full | Nanostructured (Ba,Sr)(Co,Fe)O3-δ impregnated (La,Sr)mnO3 cathodes for intermediate-temperature solid oxide fuel cells |
| title_fullStr | Nanostructured (Ba,Sr)(Co,Fe)O3-δ impregnated (La,Sr)mnO3 cathodes for intermediate-temperature solid oxide fuel cells |
| title_full_unstemmed | Nanostructured (Ba,Sr)(Co,Fe)O3-δ impregnated (La,Sr)mnO3 cathodes for intermediate-temperature solid oxide fuel cells |
| title_short | Nanostructured (Ba,Sr)(Co,Fe)O3-δ impregnated (La,Sr)mnO3 cathodes for intermediate-temperature solid oxide fuel cells |
| title_sort | nanostructured (ba,sr)(co,fe)o3-δ impregnated (la,sr)mno3 cathodes for intermediate-temperature solid oxide fuel cells |
| url | http://hdl.handle.net/20.500.11937/15588 |