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Structural and electrochemical study of a new crystalline hydrated iron(III) phosphate FePO<sub>4</sub>·H<sub>2</sub>O obtained from LiFePO<sub>4</sub>(OH) by ion exchange
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | MARX, Nicolas | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | CROGUENNEC, Laurence | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | CARLIER-LARREGARAY, Dany | |
| hal.structure.identifier | Institut des Sciences Moléculaires [ISM] | |
| dc.contributor.author | BOURGEOIS, Lydie | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | KUBIAK, Pierre | |
| hal.structure.identifier | Laboratoire d'Innovation pour les Technologies des Energies Nouvelles et les nanomatériaux [LITEN] | |
| dc.contributor.author | LE CRAS, Frédéric | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | DELMAS, Claude | |
| dc.date.issued | 2010 | |
| dc.identifier.issn | 0897-4756 | |
| dc.description.abstractEn | A new iron(III) phosphate FePO<sub>4</sub>·H<sub>2</sub>O, isostructural to already reported VPO<sub>4</sub>·H<sub>2</sub>O and MnPO<sub>4</sub>·H<sub>2</sub>O phases, was obtained from tavorite LiFePO<sub>4</sub>(OH) through a Li<sup>+</sup>/H<sup>+</sup> exchange. The composition of this new phase was confirmed by different chemical analyses. The ion-exchange reaction was shown to be topotactic; indeed the structures of LiFePO<sub>4</sub>OH and FePO<sub>4</sub>·H<sub>2</sub>O are very similar and both are characterized by chains of FeO<sub>6</sub> octahedra, interconnected through PO<sub>4</sub> tetrahedra, such as the resulting frameworks enclose different types of tunnels. A neutron diffraction study has allowed the localization of hydrogens in the FePO<sub>4</sub>·H<sub>2</sub>O structure, revealing that the two hydrogen atoms are linked to the oxygen atoms shared by two adjacent FeO<sub>6</sub> octahedra. The presence of these “H<sub>2</sub>O-like” groups inserted along the FeO<sub>6</sub> chains leads to a considerable distortion of the FeO<sub>6</sub> octahedra. The nature of the −OH and −OH<sub>2</sub> groups in LiFePO<sub>4</sub>OH and FePO<sub>4</sub>·H<sub>2</sub>O, respectively, was confirmed by vibrational spectroscopies. Lithium intercalation was shown to occur in FePO<sub>4</sub>·H<sub>2</sub>O through the reduction of Fe<sup>3+</sup> to Fe<sup>2+</sup> at an average voltage of 2.8 V (vs Li<sup>+</sup>/Li) with a good cyclability. | |
| dc.language.iso | en | |
| dc.publisher | American Chemical Society | |
| dc.title.en | Structural and electrochemical study of a new crystalline hydrated iron(III) phosphate FePO<sub>4</sub>·H<sub>2</sub>O obtained from LiFePO<sub>4</sub>(OH) by ion exchange | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1021/cm903370z | |
| dc.subject.hal | Chimie/Matériaux | |
| bordeaux.journal | Chemistry of Materials | |
| bordeaux.page | 1854-1861 | |
| bordeaux.volume | 22 | |
| bordeaux.issue | 5 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-00472511 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-00472511v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Chemistry%20of%20Materials&rft.date=2010&rft.volume=22&rft.issue=5&rft.spage=1854-1861&rft.epage=1854-1861&rft.eissn=0897-4756&rft.issn=0897-4756&rft.au=MARX,%20Nicolas&CROGUENNEC,%20Laurence&CARLIER-LARREGARAY,%20Dany&BOURGEOIS,%20Lydie&KUBIAK,%20Pierre&rft.genre=article |
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