Structural transformations of the La2−xPrxNiO4+δ system probed by high-resolution synchrotron and neutron powder diffraction
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | VIBHU, Vaibhav | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | SUCHOMEL, Matthew | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | PENIN, Nicolas | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | WEILL, François | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | GRENIER, Jean-Claude | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | BASSAT, Jean-Marc. | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | ROUGIER, Aline | |
| dc.date.issued | 2019 | |
| dc.identifier.issn | 1477-9226 | |
| dc.description.abstractEn | Compositions in the La2−xPrxNiO4+δ series offer an attractive balance of chemical stability and electrochemical performance for use as cathode materials in solid oxide fuel cells (SOFCs). A detailed crystallographic study of this system has been performed, combining both high resolution synchrotron and neutron powder diffraction data, in order to investigate structural details of the series as a function of composition, temperature and oxygen over-stoichiometry. The monoclinic structure (space group F2/m) of ambient temperature Pr-rich compositions for 1.0 < x ≤ 2.0 is discussed in terms of octahedra tilt arrangements and possible long-range structural modulations. In situ synchrotron diffraction experiments and TEM are employed to examine the role of temperature and interstitial oxygen on these structural distortions. With increasing La substitution, a region of mixed monoclinic and tetragonal phases is described for 0.5 ≤ x ≤ 1.0. La-Rich compositions are found to be single phase tetragonal (F4/mmm for 0 < x < 0.5) or orthorhombic (Fmmm for x = 0). Possible origins and electrochemical property consequences of the refined structural trends are considered. | |
| dc.description.sponsorship | Performance Et Robustesse pour les cellules d'Electrolyse haute température de Nouvelle génération - ANR-11-PRGE-0016 | |
| dc.language.iso | en | |
| dc.publisher | Royal Society of Chemistry | |
| dc.title.en | Structural transformations of the La2−xPrxNiO4+δ system probed by high-resolution synchrotron and neutron powder diffraction | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1039/C8DT03524E | |
| dc.subject.hal | Chimie/Matériaux | |
| bordeaux.journal | Dalton Transactions | |
| bordeaux.page | 266-277 | |
| bordeaux.volume | 48 | |
| bordeaux.issue | 1 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-01975628 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-01975628v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Dalton%20Transactions&rft.date=2019&rft.volume=48&rft.issue=1&rft.spage=266-277&rft.epage=266-277&rft.eissn=1477-9226&rft.issn=1477-9226&rft.au=VIBHU,%20Vaibhav&SUCHOMEL,%20Matthew&PENIN,%20Nicolas&WEILL,%20Fran%C3%A7ois&GRENIER,%20Jean-Claude&rft.genre=article |
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