Synthesis of hexagonal-symmetry α-iron oxyhydroxide crystals using reduced graphene oxide as a surfactant and their Li storage properties
Author
Zhang, Cuimiao
Zhu, Jixin
Rui, Xianhong
Chen, Jing
Sim, Daohao
Shi, Wenhui
Hng, Huey Hoon
Lim, Tuti Mariana
Yan, Qingyu
Date of Issue
2012School
School of Civil and Environmental Engineering
School of Materials Science and Engineering
School of Materials Science and Engineering
Research Centre
Energy Research Institute
TUM-CREATE Center for Electromobility
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.
http://dx.doi.org/10.1039/c1ce05965c
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