Jump to main content
Jump to site search

Issue 28, 2016
Previous Article Next Article

Structural and electrochemical studies of a new Tavorite composition: LiVPO4OH

Author affiliations

Abstract

Polyanionic materials attract strong interest in the field of Li-ion battery research thanks to the wide range of compositions, structures and electrochemical properties they offer. Tavorite-type compositions offer a very rich crystal chemistry, among which LiVPO4F has the highest theoretical energy density (i.e. 655 W h kg−1). A new Tavorite-type LiVPO4OH composition was synthesized by a hydrothermal route from three different vanadium-containing precursors. The crystal structure of this new phase was fully determined thanks to synchrotron X-ray and neutron diffraction. 1H, 7Li, and 31P magic angle spinning nuclear magnetic resonance spectroscopy as well as diffuse reflectance infra-red spectroscopy were performed in order to support further the nature of the phases formed. Galvanostatic intermittent titration technique experiments in lithium batteries and ex situ X-ray diffraction analyses revealed that during oxidation the concomitant extraction of Li+ and H+ occurs at the same equilibrium potential (3.95 V vs. Li+/Li) and leads to the formation of the Tavorite phase VPO4O at the end of the charge. LiVPO4OH is also electrochemically active in the low voltage region, upon Li+ insertion. The reversible insertion/extraction of lithium at 1.35 V vs. Li+/Li leads to the formation of Li2VPO4OH at the end of discharge.

Graphical abstract: Structural and electrochemical studies of a new Tavorite composition: LiVPO4OH

Back to tab navigation

Supplementary files

Publication details

The article was received on 21 Apr 2016, accepted on 16 Jun 2016 and first published on 16 Jun 2016


Article type: Paper
DOI: 10.1039/C6TA03339C
Citation: J. Mater. Chem. A, 2016,4, 11030-11045
  •   Request permissions

    Structural and electrochemical studies of a new Tavorite composition: LiVPO4OH

    E. Boivin, J. Chotard, M. Ménétrier, L. Bourgeois, T. Bamine, D. Carlier, F. Fauth, E. Suard, C. Masquelier and L. Croguennec, J. Mater. Chem. A, 2016, 4, 11030
    DOI: 10.1039/C6TA03339C

Search articles by author

Spotlight

Advertisements