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Increasing tap density of carbon-coated Na3V2(PO4)2F3 via mechanical grinding: good or bad idea?

hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
hal.structure.identifierRéseau sur le stockage électrochimique de l'énergie [RS2E]
dc.contributor.authorMINART, Gaël
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
hal.structure.identifierRéseau sur le stockage électrochimique de l'énergie [RS2E]
hal.structure.identifierAdvanced Lithium Energy Storage Systems - ALISTORE-ERI [ALISTORE-ERI]
dc.contributor.authorCROGUENNEC, Laurence
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
hal.structure.identifierRéseau sur le stockage électrochimique de l'énergie [RS2E]
dc.contributor.authorWEILL, François
hal.structure.identifierPlateforme Aquitaine de Caractérisation des Matériaux [PLACAMAT]
dc.contributor.authorLABRUGÈRE-SARROSTE, Christine
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
hal.structure.identifierRéseau sur le stockage électrochimique de l'énergie [RS2E]
hal.structure.identifierAdvanced Lithium Energy Storage Systems - ALISTORE-ERI [ALISTORE-ERI]
dc.contributor.authorOLCHOWKA, Jacob
dc.date2024-03-20
dc.date.issued2024-03-20
dc.identifier.issn2574-0962
dc.description.abstractEnPolyanionic positive electrode materials such as Na3V2(PO4)2F3 are renowned for their exceptional rate performance and long-term stability during cycling. However, they present low tap densities that penalize the volumetric energy density when it comes to practical applications. In this study, we successfully increased the tap density of carbon-coated Na3V2(PO4)2F3 by 40% through mechanical grinding of dense particles previously obtained via the solid-state reaction, resulting in an impressively high tap density of 1.4 g/cm3. Comprehensive structural and microstructural investigations revealed that this mechanical process reduces both particle and crystallite sizes without affecting the structure or the composition of the active material. Besides extensive electrochemical experiments, including evaluation of capacity retention upon long-term cycling and at high rates, electrochemical impedance spectroscopy as well as self-discharge tests were conducted to assess the impact of the change in microstructure on the energy storage performance. Furthermore, thermal stability assessments of electrodes in contact with electrolytes and at different states of charge were also performed to complete the study and provide a complete overview of the influence of such mechanical grinding processes commonly employed in the field of energy storage.
dc.description.sponsorshipDes liquides ioniques pour nano-structurer et fonctionnaliser la surface de matériaux d'électrode - ANR-21-CE50-0006
dc.description.sponsorshipLaboratory of excellency for electrochemical energy storage - ANR-10-LABX-0076
dc.language.isoen
dc.publisherACS
dc.subject.enNa-ion Batteries
dc.subject.enPositive electrode material
dc.subject.enNa3V2(PO4)2F3
dc.subject.enTap density
dc.subject.enMechanical grinding
dc.subject.enSelf-discharge
dc.title.enIncreasing tap density of carbon-coated Na3V2(PO4)2F3 via mechanical grinding: good or bad idea?
dc.typeArticle de revue
dc.identifier.doi10.1021/acsaem.3c03230
dc.subject.halChimie/Matériaux
bordeaux.journalACS Applied Energy Materials
bordeaux.peerReviewedoui
hal.identifierhal-04521211
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-04521211v1
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