title: Manipulating size of Li3V2(PO4)3 with reduced graphene oxide: towards high-performance composite cathode for lithium ion batteries.
abstract: Lithium vanadium phosphate (Li3V2(PO4)3, LVP)/reduced graphene oxide (rGO) composite is prepared with a rheological method followed by heat treatment. The size and interface of LVP particles, two important merits for a cathode material, can be effectively tuned by the rGO in the composite, which plays as surfactant to assist sol-gelation and simultaneously as conductive carbon coating. As a consequence, the composite with 7.0 ± 0.4 wt.% rGO shows a capacity of 141.6 mAh g(-1) at 0.075 C, and a rate capacity of 119.0 mAh g(-1) at 15 C with respect to the mass of LVP/rGO composite, and an excellent cycling stability that retains 98.7% of the initial discharge capacity after 50 cycles. The improved electrochemical performance is attributed to the well-controlled rGO content that yields synergic effects between LVP and rGO. Not only do the rGO sheets reduce the size of LVP particles that favor the Li(+) ion migration and the electron transfer during charging and discharging, but also contribute to the reversible lithium ions storage.
authors.affiliation: College of Chemistry, Central China Normal University, 152 Luoyu Rd, Wuhan, Hubei 430079 (P. R. China).
authors.forename: Xianjun
authors.initials: X
authors.lastname: Zhu
authors.affiliation: College of Chemistry, Central China Normal University, 152 Luoyu Rd, Wuhan, Hubei 430079 (P. R. China).
authors.forename: Zan
authors.initials: Z
authors.lastname: Yan
authors.affiliation: College of Chemistry, Central China Normal University, 152 Luoyu Rd, Wuhan, Hubei 430079 (P. R. China).
authors.forename: Wenyan
authors.initials: W
authors.lastname: Wu
authors.affiliation: Department of Materials Science and Engineering &CAS Key Laboratory of Materials for Energy Conversion, University of Science and Technology of China, 96 Jin Zhai Rd, Hefei, Anhui 230026 (P. R. China).
authors.forename: Wencong
authors.initials: W
authors.lastname: Zeng
authors.affiliation: Department of Materials Science and Engineering &CAS Key Laboratory of Materials for Energy Conversion, University of Science and Technology of China, 96 Jin Zhai Rd, Hefei, Anhui 230026 (P. R. China).
authors.forename: Yuanxin
authors.initials: Y
authors.lastname: Du
authors.affiliation: College of Chemistry, Central China Normal University, 152 Luoyu Rd, Wuhan, Hubei 430079 (P. R. China).
authors.forename: Yu
authors.initials: Y
authors.lastname: Zhong
authors.affiliation: College of Chemistry, Central China Normal University, 152 Luoyu Rd, Wuhan, Hubei 430079 (P. R. China).
authors.forename: Haidie
authors.initials: H
authors.lastname: Zhai
authors.affiliation: Department of Materials Science and Engineering &CAS Key Laboratory of Materials for Energy Conversion, University of Science and Technology of China, 96 Jin Zhai Rd, Hefei, Anhui 230026 (P. R. China).
authors.forename: Hengxing
authors.initials: H
authors.lastname: Ji
authors.affiliation: Department of Materials Science and Engineering &CAS Key Laboratory of Materials for Energy Conversion, University of Science and Technology of China, 96 Jin Zhai Rd, Hefei, Anhui 230026 (P. R. China).
authors.forename: Yanwu
authors.initials: Y
authors.lastname: Zhu