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MnO2 nanorods/3D-rGO composite as high performance anode materials for Li-ion batteries

Liu, Hongdong ; Hu, Zhongli ; Su, Yongyao ; Ruan, Haibo ; Hu, Rong ; Zhang, Lei

Applied surface science, 2017-01, Vol.392, p.777-784 [Revista revisada por pares]

Elsevier B.V

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  • Título:
    MnO2 nanorods/3D-rGO composite as high performance anode materials for Li-ion batteries
  • Autor: Liu, Hongdong ; Hu, Zhongli ; Su, Yongyao ; Ruan, Haibo ; Hu, Rong ; Zhang, Lei
  • Materias: Anodes ; Electrochemical analysis ; Electrochemical performance ; Graphene ; Li-ion batteries ; Lithium-ion batteries ; MnO2 ; Nanorods ; Particulate composites ; Rechargeable batteries ; Reduced graphene oxide ; X-rays
  • Es parte de: Applied surface science, 2017-01, Vol.392, p.777-784
  • Notas: ObjectType-Article-1
    SourceType-Scholarly Journals-1
    ObjectType-Feature-2
    content type line 23
  • Descripción: •MnO2 nanorods/3D-rGO composite has been synthesized by a simple in situ hydrothermal methord.•MnO2 nanorods/3D-rGO composite exhibits high reversible capacity, outstanding rate capacity and excellent cyclic stability.•Building metal oxides/3D-rGO composite is an effective way for improving the electrochemical performance of Li-ion batteries. MnO2 nanorods/three-dimensional reduced graphene oxide (3D-rGO) composite has been synthesized by a simple in situ hydrothermal methord. The X-ray diffraction (XRD) pattern of the as-prepared composite reveals tetragonal structure of α-MnO2. Raman spectroscopic and X-ray photoelectron spectroscopy (XPS) of the samples confirm the coexistence of MnO2 and graphene. The Brunauer-Emmett-Teller (BET) analysis shows the large surface area of the composite. The electron microscopy images of the as-synthesized products reveals the MnO2 nanorods are homogeneously grown on 3D-rGO matrix. Electrochemical characterization exhibits the MnO2 nanorods/3D-rGO composite with large reversible capacity (595mAhg−1 over 60 cycles at 100mAg−1), high coulombic efficiency (above 99%), excellent rate capability and good cyclic stability. The superior electrochemical performance can be attributed to the turf-like nanostructure of composite, high capacity of MnO2 and superior electrical conductivity of 3D-rGO. It suggests that MnO2 nanorods/3D-rGO composite will be a promising anode material for Li-ion batteries.
  • Editor: Elsevier B.V
  • Idioma: Inglés
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