Extended Limits of Reversible Electrochemical Lithiation of Crystalline V 2 O 5

Daniil M. Itkis, Victor A. Krivchenko, Anna Ya Kozmenkova, Margarita S. Pakhotina, Filipp S. Napolskiy, Lara Gigli, Jasper Plaisier, Nellie R. Khasanova, Evgeny V. Antipov

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

Although lithium intercalation into vanadium (V) oxide was studied over decades, exact compositional stability limits for γ-Li x V 2 O 5 phase, which can be reversibly lithiated and delithiated, are still not clear. Using operando and ex-situ synchrotron X-ray diffraction, we traced phase composition of the V 2 O 5 electrodes containing reduced graphene oxide during its lithiation and delithiation. We found that coating of micron-sized V 2 O 5 particles by reduced graphene oxide yields the material providing electrochemical capacity of more than 300 mA h g −1 manifesting insertion of more than 2 lithium ions per mole of V 2 O 5 as confirmed by ICP MS analysis of the electrodes. The obtained electrode material can be sustainably cycled with capacity retaining at ca. 220 mA h g −1 at 500 mA g −1 current over 200 cycles.

Original languageEnglish
Pages (from-to)2013-2019
Number of pages7
JournalChemElectroChem
Volume6
Issue number7
DOIs
Publication statusPublished - 1 Apr 2019

Keywords

  • lithium batteries
  • operando X-ray diffraction
  • reduced graphene oxide
  • reversible intercalation
  • vanadium oxide

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