Stabilization of a mixed iron vanadium based hexagonal tungsten bronze hydroxyfluoride HTB-(Fe0.55 V0.45 )F2.67 (OH)0.33 as a positive electrode for lithium-ion batteries

Dalton Transactions : an International Journal of Inorganic Chemistry
Kévin LemoineVincent Maisonneuve

Abstract

In our search for novel insertion compounds for Li-based batteries, we have identified a new mixed iron vanadium based Hexagonal Tungsten Bronze (HTB) type phase. Its synthesis involves two steps which consist first of preparing mixed metal hydrated fluoride Fe1.64V1.36F8(H2O)2 by a microwave assisted thermal process, followed by thermal treatment under air to obtain metastable HTB-(Fe0.55V0.45)F2.67(OH)0.33 hydroxyfluoride. 57Fe Mössbauer spectrometry demonstrates the presence of oxidation states Fe2+ and Fe3+ in Fe1.64V1.36F8(H2O)2 as opposed to only Fe3+ in HTB-(Fe0.55V0.47)F2.67(OH)0.33. Moreover, the Mössbauer spectra recorded at 77 K reveal that none of the compounds shows magnetic ordering owing to the presence of V3+ distributed over the crystallographic sites of Fe3+. Complementary X-ray spectroscopy and Rietveld refinement further confirm the successful synthesis of HTB-(Fe0.55V0.45)F2.67(OH)0.33. Electrochemically, the new HTB-(Fe0.55V0.45)F2.67(OH)0.33 shows a first discharge capacity of 181 mA h g-1 with 67% of this capacity remaining upon cycling. Unlike HTB-FeF2.66(OH)0.34, the structure remains stable after the first discharge confirming the positive effect of vanadium in the HTB network.

References

Nov 20, 2001·Nature·J M Tarascon, M Armand
Feb 8, 2008·Nature·M Armand, J-M Tarascon
Jul 26, 2013·Journal of the American Chemical Society·Chilin LiJoachim Maier
Sep 14, 2018·Chemical Communications : Chem Comm·Henri Groult, Alain Tressaud
Dec 20, 2018·The Journal of Physical Chemistry Letters·Mario BurbanoDamien Dambournet
Feb 15, 2020·Chemical Science·Kévin LemoineNikolay Kornienko

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