Journal of Inorganic Materials ›› 2018, Vol. 33 ›› Issue (7): 741-748.doi: 10.15541/jim20170441

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Ferric Oxide-reduced Graphene Oxide Composite Material: Synthesis Based on Covalent Binding and Its Lithium-storage Property

Shi-Lin QIN1(), Ji-Cheng LI1, Zhao-Hui LI1(), Zhong-Liang HU2(), Yan-Huai DING3, Gang-Tie LEI1, Qi-Zhen XIAO1   

  1. 1. College of Chemistry, Xiangtan University, Xiangtan 411105, China
    2. College of Metallurgic Engineering, Hunan University of Technology, Zhuzhou 412007, China
    3. College of Civil Engineering & Mechanics, Xiangtan University, Xiangtan 411105, China;
  • Received:2017-09-12 Revised:2017-12-10 Online:2018-07-10 Published:2018-06-19
  • About author:QIN Shi-Lin. E-mail: 876779691@qq.com

Abstract:

Monodispersed ferroferric oxide (Fe3O4) microspheres were prepared by a solvo-thermal method at first. They were coated with a thin layer of silica, and modified with amino groups. These updated microspheres were mixed with graphene oxide (GO) followed by a chemical reduction to yield Fe3O4-W-RGO. The sample was characterized with scanning electron microscopy (SEM) and transition electron microscopy (TEM). Fe3O4 microspheres (~440 nm in diameter) are proved to be surface-coated by a SiO2 layer homogeneously to afford Fe3O4@SiO2 core-shell microspheres, tightly bound to reduced graphene oxide (RGO) nanosheets. From X-ray diffraction (XRD) patterns, Fe3O4 microspheres display good crystallinity and high purity. Results of electrochemical measurements indicate that Fe3O4-W-RGO sample can deliver an initial capacity of 1246 mAh/g at 0.1C rate over 0.01 V-3.00 V (vs. Li+/Li), and retain 830 mAh/g after 100 cycles. Even at 2C rate, it can still deliver a capacity of 484 mAh/g. All results suggest that Fe3O4-W-RGO composite material possesses good rate capability and cycling performance when used as anode material for lithium-ion batteries.

Key words: ferroferric oxide, graphene oxide, covalent binding interaction, lithium-ion batteries

CLC Number: 

  • TQ174