| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| hal.structure.identifier | Réseau sur le stockage électrochimique de l'énergie [RS2E] | |
| dc.contributor.author | WERNERT, Romain | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| hal.structure.identifier | Réseau sur le stockage électrochimique de l'énergie [RS2E] | |
| dc.contributor.author | NGUYEN, Long | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| hal.structure.identifier | Réseau sur le stockage électrochimique de l'énergie [RS2E] | |
| dc.contributor.author | PETIT, Emmanuel | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | SANZ CAMACHO, Paula | |
| hal.structure.identifier | Réseau sur le stockage électrochimique de l'énergie [RS2E] | |
| dc.contributor.author | IADECOLA, Antonella | |
| hal.structure.identifier | European Synchrotron Radiation Facility [Grenoble] [ESRF] | |
| hal.structure.identifier | Institute of Nanostructured Materials [ISMN] | |
| dc.contributor.author | LONGO, Alessandro | |
| hal.structure.identifier | ALBA Synchrotron light source [Barcelone] | |
| dc.contributor.author | FAUTH, François | |
| hal.structure.identifier | Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier [ICGM] | |
| hal.structure.identifier | Réseau sur le stockage électrochimique de l'énergie [RS2E] | |
| dc.contributor.author | STIEVANO, Lorenzo | |
| hal.structure.identifier | Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier [ICGM] | |
| hal.structure.identifier | Réseau sur le stockage électrochimique de l'énergie [RS2E] | |
| dc.contributor.author | MONCONDUIT, Laure | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| hal.structure.identifier | Réseau sur le stockage électrochimique de l'énergie [RS2E] | |
| dc.contributor.author | CARLIER, Dany | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| hal.structure.identifier | Réseau sur le stockage électrochimique de l'énergie [RS2E] | |
| dc.contributor.author | CROGUENNEC, Laurence | |
| dc.date.issued | 2022 | |
| dc.identifier.issn | 0897-4756 | |
| dc.description.abstractEn | Exploring and tailoring new high energy density positive electrode materials is still a challenge for alkali-ion batteries. In this work, we synthesized the mixed anion phases KVPO4F1-yOy (y = 0, 0.25, 0.5, 0.75, 1) and determined their crystallographic and electronic structures by combining synchrotron X-ray diffraction, X-ray absorption spectroscopy at the vanadium K edge, and 31P MAS NMR coupled with density functional theory calculations. These experiments confirmed that the substitution of F- for O2- anions occurs as a solid solution across the whole composition domain. The local environments of vanadium ions are complex and diverse since the cis and trans octahedra undergo different distortions in the presence of a vanadyl bond. The simultaneous existence of ionic VIII-F bonds and covalent (VIV=O)2+ vanadyl type entities is strongly affecting the electrochemical properties and potassium deinsertion/insertion mechanisms upon cycling. Ultimately, KVPO4F0.5O0.5 appears as a promising positive electrode material due to its high capacity (105 mAh·g-1), working potential (4.2 V vs K+/K), and sloping electrochemical curve. | |
| dc.description.sponsorship | Vers des batteries innovantes K-ion | |
| dc.description.sponsorship | Laboratory of excellency for electrochemical energy storage - ANR-10-LABX-0076 | |
| dc.description.sponsorship | Spectromètre EXAFS Rapide pour Cinétiques Chimiques - ANR-10-EQPX-0045 | |
| dc.language.iso | en | |
| dc.publisher | American Chemical Society | |
| dc.title.en | Controlling the Cathodic Potential of KVPO4F through Oxygen Substitution | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1021/acs.chemmater.2c00295 | |
| dc.subject.hal | Chimie/Matériaux | |
| dc.subject.hal | Chimie/Chimie inorganique | |
| bordeaux.journal | Chemistry of Materials | |
| bordeaux.page | 4523-4535 | |
| bordeaux.volume | 34 | |
| bordeaux.issue | 10 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-03690171 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-03690171v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Chemistry%20of%20Materials&rft.date=2022&rft.volume=34&rft.issue=10&rft.spage=4523-4535&rft.epage=4523-4535&rft.eissn=0897-4756&rft.issn=0897-4756&rft.au=WERNERT,%20Romain&NGUYEN,%20Long&PETIT,%20Emmanuel&SANZ%20CAMACHO,%20Paula&IADECOLA,%20Antonella&rft.genre=article | |
