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      Synthesis of hexagonal-symmetry α-iron oxyhydroxide crystals using reduced graphene oxide as a surfactant and their Li storage properties

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      Author
      Zhang, Cuimiao
      Zhu, Jixin
      Rui, Xianhong
      Chen, Jing
      Sim, Daohao
      Shi, Wenhui
      Hng, Huey Hoon
      Lim, Tuti Mariana
      Yan, Qingyu
      Date of Issue
      2012
      School
      School of Civil and Environmental Engineering
      School of Materials Science and Engineering
      Research Centre
      Energy Research Institute
      TUM-CREATE Center for Electromobility
      Abstract
      Microcrystalline α-iron oxyhydroxide/reduced graphene oxide (α-FeOOH/rGO) samples have been successfully synthesized by a facile hydrothermal process. The α-FeOOH/rGO samples are either hexagonal disks with a diameter of [similar]1 μm and a thickness of 300 nm or hexapods with a diameter of [similar]2 μm and a thickness of 700 nm, while only bulk and aggregated FeOOH is observed without the addition of graphene oxide sheets. The size and shape of the α-FeOOH depend on the reaction time, concentration of Fe3+, and the addition of graphene oxide. The growth of the hexagonal disks and hexapods is mainly due to a series of phase and structural transformations. The α-FeOOH/rGO displays superior anode performance with a high reversible specific capacity of 569 mA h g−1 at the 50th cycle.
      Subject
      DRNTU::Engineering::Materials::Metallic materials
      Type
      Journal Article
      Series/Journal Title
      CrystEngComm
      Rights
      © 2012 The Royal Society of Chemistry.
      Collections
      • CEE Journal Articles
      • MSE Journal Articles
      • ERI@N Journal Articles
      http://dx.doi.org/10.1039/c1ce05965c
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