title: 3D-0D Graphene-Fe3O4Quantum Dot Hybrids as High-Performance Anode Materials for Sodium-Ion Batteries.
abstract: Transition metal oxides can be considered as appealing candidates for sodium ion battery anode materials because these low-cost materials possess high capacity and enhanced safety. However, the practical application of these materials is usually limited by their low electronic conductivity and serious volume change during the charging-discharging process. Herein, we report the fabrication of 3D-0D graphene-Fe3O4quantum dot hybrids by a facile one-pot hydrothermal approach as anode materials for sodium-ion batteries. Fe3O4quantum dots with an average size of 4.9 nm are anchored on the surface of 3D structured graphene nanosheets homogeneously. Such unique hierarchical structure are advantageous for enlarging the electrode/electrolyte interface area and enhancing the electrochemical activity of the hybrid materials, inhibiting particle aggregation of Fe3O4and accommodating their volume change during the charging-discharging process as well as enabling fast diffusion of electrons and rapid transfer of electrolyte ions. Consequently, the 3D-0D graphene-Fe3O4quantum dot hybrids exhibit ultrahigh sodium storage capacity (525 mAh g-1at 30 mA g-1), outstanding cycling stability (312 mAh g-1after 200 cycles at 50 mA g-1) and superior rate performance (56 mAh g-1at 10 A g-1).
authors.affiliation: State Key Laboratory of Organic-Inorganic Composites, Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology , Beijing 100029, China.
authors.forename: Huan
authors.initials: H
authors.lastname: Liu
authors.affiliation: State Key Laboratory of Organic-Inorganic Composites, Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology , Beijing 100029, China.
authors.forename: Mengqiu
authors.initials: M
authors.lastname: Jia
authors.affiliation: State Key Laboratory of Organic-Inorganic Composites, Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology , Beijing 100029, China.
authors.forename: Qizhen
authors.initials: Q
authors.lastname: Zhu
authors.affiliation: State Key Laboratory of Organic-Inorganic Composites, Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology , Beijing 100029, China.
authors.forename: Bin
authors.initials: B
authors.lastname: Cao
authors.affiliation: School of Materials Science & Engineering, Beijing Key Laboratory of Environmental Science and Engineering, Beijing Institute of Technology , Beijing 100081, China.
authors.forename: Renjie
authors.initials: R
authors.lastname: Chen
authors.affiliation: State Key Laboratory of Organic-Inorganic Composites, Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology , Beijing 100029, China.
authors.forename: Yu
authors.initials: Y
authors.lastname: Wang
authors.affiliation: School of Materials Science & Engineering, Beijing Key Laboratory of Environmental Science and Engineering, Beijing Institute of Technology , Beijing 100081, China.
authors.forename: Feng
authors.initials: F
authors.lastname: Wu
authors.affiliation: State Key Laboratory of Organic-Inorganic Composites, Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology , Beijing 100029, China.
authors.forename: Bin
authors.initials: B
authors.lastname: Xu
keywords: Fe3O4; graphene; quantum dots; sodium-ion batteries; three-dimensional structure