title: Enhanced Lithium Storage in Reduced Graphene Oxide-supported M-phase Vanadium(IV) Dioxide Nanoparticles.
abstract: Vanadium(IV) dioxide (VO2) has drawn attention as one of the most attractive electrode materials for lithium-ion batteries (LIBs), hence, much research has been conducted in various sectors in this field. However, to date, most of this research has focused on the VO2(B) polymorph, whereas electrochemical information on the use of VO2(M) in LIB electrodes is insufficient. Thus, it is worthwhile to explore the possibility of using VO2(M) for LIB electrode application, and to investigate whether its electrochemical properties can be improved. In this study, VO2(M) nanoparticles, incorporated with a reduced graphene oxide composite (NP-VO2/rGO), were successfully synthesized via a sol-gel assisted hydrothermal process by the chemical reduction of V2O5 gel, using hydrazine as the reducing agent. The particle size was less than 50 nm regardless of the presence of rGO. Also, NP-VO2/rGO exhibited a specific capacity of 283 mA h g(-1) up to the 200(th) cycle at a current density of 60 mA g(-1), indicating its potential to be used in LIBs.
authors.affiliation: Department of Materials Science and Engineering, Seoul National University, Seoul 151-744, Republic of Korea.
authors.forename: Hee Jo
authors.initials: HJ
authors.lastname: Song
authors.affiliation: School of Civil, Environmental and Architectural Engineering, Korea University, Seoul 136-713, Republic of Korea.
authors.forename: Mingu
authors.initials: M
authors.lastname: Choi
authors.affiliation: School of Civil, Environmental and Architectural Engineering, Korea University, Seoul 136-713, Republic of Korea.
authors.forename: Jae-Chan
authors.initials: JC
authors.lastname: Kim
authors.affiliation: Department of Materials Science and Engineering, Seoul National University, Seoul 151-744, Republic of Korea.
authors.forename: Sangbaek
authors.initials: S
authors.lastname: Park
authors.affiliation: Department of Materials Science and Engineering, Seoul National University, Seoul 151-744, Republic of Korea.
authors.forename: Chan Woo
authors.initials: CW
authors.lastname: Lee
authors.affiliation: Department of Materials Science and Engineering, Seoul National University, Seoul 151-744, Republic of Korea.
authors.forename: Seong-Hyeon
authors.initials: SH
authors.lastname: Hong
authors.affiliation: High-Temperature Energy Materials Research Center, Korea Institute of Science and Technology, Seoul 136-791, Republic of Korea.
authors.forename: Byung-Kook
authors.initials: BK
authors.lastname: Kim
authors.affiliation: School of Civil, Environmental and Architectural Engineering, Korea University, Seoul 136-713, Republic of Korea.
authors.forename: Dong-Wan
authors.initials: DW
authors.lastname: Kim