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Article Dans Une Revue Journal of Materials Chemistry A Année : 2018

Coupled X-ray diffraction and electrochemical studies of the mixed Ti/V-containing NASICON: Na2TiV(PO4)(3)

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Résumé

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.

Domaines

Chimie Matériaux
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Dates et versions

hal-03611097 , version 1 (16-03-2022)

Identifiants

Citer

F. Lalere, V. Seznec, M. Courty, J. N. Chotard, C. Masquelier. Coupled X-ray diffraction and electrochemical studies of the mixed Ti/V-containing NASICON: Na2TiV(PO4)(3). Journal of Materials Chemistry A, 2018, 6 (15), pp.6654-6659. ⟨10.1039/c7ta10689k⟩. ⟨hal-03611097⟩
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