title: Heterogeneous TiO2/V2O5/Carbon Nanotube Electrodes for Lithium-Ion Batteries.
abstract: Vanadium pentoxide (V2O5) is proposed and investigated as a cathode material for lithium-ion (Li-ion) batteries. However, the dissolution of V2O5during the charge/discharge remains as an issue at the V2O5-electrolyte interface. In this work, we present a heterogeneous nanostructure with carbon nanotubes supported V2O5/titanium dioxide (TiO2) multilayers as electrodes for thin-film Li-ion batteries. Atomic layer deposition of V2O5on carbon nanotubes provides enhanced Li storage capacity and high rate performance. An additional TiO2layer leads to increased morphological stability and in return higher electrochemical cycling performance of V2O5/carbon nanotubes. The physical and chemical properties of TiO2/V2O5/carbon nanotubes are characterized by cyclic voltammetry and charge/discharge measurements as well as electron microscopy. The detailed mechanism of the protective TiO2layer to improve the electrochemical cycling stability of the V2O5is unveiled.
authors.affiliation: Department of Physics, Electron Microscopy for Materials Science (EMAT), University of Antwerp , Groenenborgerlaan 171, B-2020 Antwerp, Belgium.
authors.forename: Mert
authors.initials: M
authors.lastname: Kurttepeli
authors.affiliation: Department of Solid State Sciences, Ghent University , Krijgslaan 281 S1, B-9000 Gent, Belgium.
authors.forename: Shaoren
authors.initials: S
authors.lastname: Deng
authors.affiliation: Department of Solid State Sciences, Ghent University , Krijgslaan 281 S1, B-9000 Gent, Belgium.
authors.forename: Felix
authors.identifier: http://orcid.org/0000-0001-6275-6805
authors.initials: F
authors.lastname: Mattelaer
authors.affiliation: IMEC, Kapeldreef 75, B-3001 Leuven, Belgium.
authors.forename: Daire J
authors.initials: DJ
authors.lastname: Cott
authors.affiliation: IMEC, Kapeldreef 75, B-3001 Leuven, Belgium.
authors.forename: Philippe
authors.initials: P
authors.lastname: Vereecken
authors.affiliation: Department of Solid State Sciences, Ghent University , Krijgslaan 281 S1, B-9000 Gent, Belgium.
authors.forename: Jolien
authors.initials: J
authors.lastname: Dendooven
authors.affiliation: Department of Solid State Sciences, Ghent University , Krijgslaan 281 S1, B-9000 Gent, Belgium.
authors.forename: Christophe
authors.initials: C
authors.lastname: Detavernier
authors.affiliation: Department of Physics, Electron Microscopy for Materials Science (EMAT), University of Antwerp , Groenenborgerlaan 171, B-2020 Antwerp, Belgium.
authors.forename: Sara
authors.identifier: http://orcid.org/0000-0002-4249-8017
authors.initials: S
authors.lastname: Bals
keywords: EDX-STEM tomography; atomic layer deposition; lithium-ion batteries; titanium dioxide; transmission electron microscopy; vanadium pentoxide