Files in this item
Calcium manganite as oxygen electrode materials for reversible solid oxide fuel cell
Item metadata
dc.contributor.author | Ni, Chengsheng | |
dc.contributor.author | Irvine, John T.S. | |
dc.date.accessioned | 2015-08-07T10:10:03Z | |
dc.date.available | 2015-08-07T10:10:03Z | |
dc.date.issued | 2015 | |
dc.identifier | 190861138 | |
dc.identifier | 9637ad68-2132-44ff-8d41-bd732cb7dd06 | |
dc.identifier | 84946559903 | |
dc.identifier | 000364153200015 | |
dc.identifier.citation | Ni , C & Irvine , J T S 2015 , ' Calcium manganite as oxygen electrode materials for reversible solid oxide fuel cell ' , Faraday Discussions . https://doi.org/10.1039/C5FD00026B | en |
dc.identifier.issn | 1359-6640 | |
dc.identifier.other | Bibtex: urn:534bddd65f3f7339a9209fed183445a5 | |
dc.identifier.other | ORCID: /0000-0002-8394-3359/work/68280563 | |
dc.identifier.uri | https://hdl.handle.net/10023/7145 | |
dc.description | The authors thank EPSRC for funding under the contract of H2FC hub EPSRC: EP/J016454/1 and Platform EPSRC: EP/K006800/1 and JTSI thanks Wolfson Merit of Royal Society: WRMA 2012/R2 | en |
dc.description.abstract | For an efficient high-temperature reversible solid oxide fuel cell (RSOFC), the oxygen electrode should be highly active for the conversion between oxygen anions and oxygen gas. CaMnO3-δ(CM) is a perovskite that can be readily reduced with the formation of Mn3+ giving rise to oxygen defective phases. CM is examined here as the oxygen electrode for a RSOFC. CaMn0.9Nb0.1O3-δ (CMN) with Nb doping shows superior electric conductivity (125 S cm-1 at 700 ºC) to CM (1-5 S cm-1 at 700 ºC) in air and is also examined for comparison. X-ray diffraction (XRD) data show that CM and CMN are compatible with the widely used yttria-stabilized zirconia (YSZ) electrolyte up to 950 oC. Both materials show a thermal expansion coefficient (TEC) close to 10.8-10.9 ppm K-1 in the temperature range between 100-750 ºC, compatible with that of YSZ. Polarization curves and electrochemical impedance spectra for both fuel cell and steam electrolysis modes were investigated at 700 ºC, showing that CM presented a polarization resistance of 0.059 Ωcm2 under a cathodic bias of -0.4 V while CMN gave a polarization resistance of 0.081 Ω cm2 under an anodic bias of 0.4 V. The phase stability up to 900 ºC of these materials was investigated with thermogravimetric analysis (TGA) and variable temperature XRD. | |
dc.format.extent | 1792544 | |
dc.language.iso | eng | |
dc.relation.ispartof | Faraday Discussions | en |
dc.subject | QD Chemistry | en |
dc.subject | NDAS | en |
dc.subject.lcc | QD | en |
dc.title | Calcium manganite as oxygen electrode materials for reversible solid oxide fuel cell | en |
dc.type | Journal article | en |
dc.contributor.sponsor | EPSRC | en |
dc.contributor.sponsor | The Royal Society | en |
dc.contributor.institution | University of St Andrews. School of Chemistry | en |
dc.contributor.institution | University of St Andrews. EaSTCHEM | en |
dc.identifier.doi | https://doi.org/10.1039/C5FD00026B | |
dc.description.status | Peer reviewed | en |
dc.identifier.grantnumber | EP/J016454/1 | en |
dc.identifier.grantnumber | WRMA 2012/R2 | en |
This item appears in the following Collection(s)
Items in the St Andrews Research Repository are protected by copyright, with all rights reserved, unless otherwise indicated.