%0 Journal Article %T Coupled X-ray diffraction and electrochemical studies of the mixed Ti/V-containing NASICON: Na2TiV(PO4)(3) %+ Laboratoire réactivité et chimie des solides - UMR CNRS 7314 (LRCS) %+ Réseau sur le stockage électrochimique de l'énergie (RS2E) %A Lalere, F. %A Seznec, V. %A Courty, M. %A Chotard, J. N. %A Masquelier, C. %< avec comité de lecture %@ 2050-7488 %J Journal of Materials Chemistry A %I Royal Society of Chemistry %V 6 %N 15 %P 6654-6659 %8 2018 %D 2018 %R 10.1039/c7ta10689k %Z Chemical Sciences/Material chemistryJournal articles %X The solid state synthesis of NaTiV(PO4)(3) and Na3TiV(PO4)(3) is reported. Soft chemical oxidation of the latter composition led to NASICON Na2TiV(PO4)(3) with intermediate unit cell parameters (s.g.: R (3) over barc, a = 8.610(3) angstrom, c = 21.755(6) angstrom) when compared to NaTiV(PO4)(3) and Na3TiV(PO4)(3). Coupled structural/electrochemical studies were carried out on Na2TiV(PO4)(3) for oxidation and reduction by operando X-ray diffraction. While the oxidation mechanism towards NaTiV(PO4)(3) is quite simple, the reduction mechanisms involve several mono-and bi-phasic mechanisms leading to Na3TiV(PO4)(3) as an intermediate composition and to Na4TiV(PO4)(3) eventually. %G English %L hal-03611097 %U https://u-picardie.hal.science/hal-03611097 %~ UNIV-NANTES %~ ENSCP %~ UNIV-TLSE3 %~ UGA %~ CNRS %~ UNIV-AMU %~ CDF %~ UNIV-PICARDIE %~ UNIV-PAU %~ ENSC-MONTPELLIER %~ ENSC-PARIS %~ INPG %~ PARISTECH %~ RS2E %~ INC-CNRS %~ PSL %~ UNIV-MONTPELLIER %~ SITE-ALSACE %~ SORBONNE-UNIVERSITE %~ SORBONNE-UNIV %~ ENSCP-PSL %~ CDF-PSL %~ UGA-COMUE %~ U-PICARDIE %~ LRCS %~ ALISTORE-ERI %~ ALLIANCE-SU %~ TOULOUSE-INP %~ NANTES-UNIVERSITE %~ UNIV-NANTES-AV2022 %~ UNIV-UT3 %~ UT3-INP %~ UT3-TOULOUSEINP %~ UM-2015-2021 %~ UM-EPE