Synthesis of “Li<sub>1.1</sub>(Ni<sub>0.425</sub>Mn<sub>0.425</sub>Co<sub>0.15</sub>)<sub>0.9</sub>O<sub>1.8</sub>F<sub>0.2</sub>” materials by different routes: Is there fluorine substitution for oxygen?
| 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 | BAINS, Jessica | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | MÉNÉTRIER, Michel | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | FLAMBARD, A. | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | BEKAERT, Emilie | |
| hal.structure.identifier | SAFT [Bordeaux] | |
| dc.contributor.author | JORDY, C. | |
| hal.structure.identifier | SAFT [Bordeaux] | |
| dc.contributor.author | BIENSAN, Ph. | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | DELMAS, Claude | |
| dc.date.issued | 2009 | |
| dc.description.abstractEn | A<sup> </sup>one-step synthesis method was used, with LiF or NiF<sub>2</sub> as<sup> </sup>fluorine precursor, to prepare Li<sub>1.1</sub>(Ni<sub>0.425</sub>Mn<sub>0.425</sub>Co<sub>0.15</sub>)<sub>0.9</sub>O<sub>1.8</sub>F<sub>0.2</sub> materials. <sup>7</sup>Li and <sup>19</sup>F magic<sup> </sup>angle spinning NMR analyses revealed the presence of fluorine as<sup> </sup>LiF at the surface of the Li(Ni<sub>0.425</sub>Mn<sub>0.425</sub>Co<sub>0.15</sub>)O<sub>2</sub> particles, rejecting the<sup> </sup>formation of fluorine-substituted Li<sub>1.1</sub>(Ni<sub>0.425</sub>Mn<sub>0.425</sub>Co<sub>0.15</sub>)<sub>0.9</sub>O<sub>1.8</sub>F<sub>0.2</sub> materials. These results highlighted that change<sup> </sup>in cell parameters with increasing fluorine content is not by<sup> </sup>itself proof for effective fluorine substitution for oxygen in layered<sup> </sup>oxides and that heterogeneity in the transition metal and fluoride-ion<sup> </sup>distribution at the crystallite scale can be at the origin<sup> </sup>of these modifications. LiF was shown to be present as<sup> </sup>small particles in some grain boundaries but not as a<sup> </sup>continuous layer covering the particles surface. Improved cycling stability was<sup> </sup>observed for these LiF-coated materials, showing that effective fluorine substitution<sup> </sup>for oxygen is not required for improvement of the cyclability<sup> </sup>of these layered oxides; a surface modification can be sufficient<sup> </sup>and can also have a huge impact. | |
| dc.language.iso | en | |
| dc.subject.en | Electrochemical electrodes | |
| dc.subject.en | Grain boundaries | |
| dc.subject.en | Lattice constants | |
| dc.subject.en | Lithium compound | |
| dc.subject.en | Mmagic angle spinning | |
| dc.subject.en | Materials preparation | |
| dc.subject.en | Secondary cells | |
| dc.title.en | Synthesis of “Li<sub>1.1</sub>(Ni<sub>0.425</sub>Mn<sub>0.425</sub>Co<sub>0.15</sub>)<sub>0.9</sub>O<sub>1.8</sub>F<sub>0.2</sub>” materials by different routes: Is there fluorine substitution for oxygen? | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1149/1.3080659 | |
| dc.subject.hal | Chimie/Matériaux | |
| bordeaux.journal | Journal of the Electrochemistry | |
| bordeaux.page | A349-A355 | |
| bordeaux.volume | 156 | |
| bordeaux.issue | 5 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-00364482 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-00364482v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Journal%20of%20the%20Electrochemistry&rft.date=2009&rft.volume=156&rft.issue=5&rft.spage=A349-A355&rft.epage=A349-A355&rft.au=CROGUENNEC,%20Laurence&BAINS,%20Jessica&M%C3%89N%C3%89TRIER,%20Michel&FLAMBARD,%20A.&BEKAERT,%20Emilie&rft.genre=article |
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