Details

Autor(en) / Beteiligte

• Zhang, Cuimiao
• Zhu, Jixin
• Rui, Xianhong
• Chen, Jing
• Sim, Daohao
• Shi, Wenhui
• Hng, Huey Hoon
• Lim, Tuti Mariana
• Yan, Qingyu

Titel

Synthesis of hexagonal-symmetry α-iron oxyhydroxide crystals using reduced graphene oxide as a surfactant and their Li storage propertiesElectronic supplementary information (ESI) available: EDX, Raman spectra, XRD, SEM, schematic diagram, Coulombic efficiency, and cycling performance of the as-obtained products. See DOI: 10.1039/c1ce05965c

Erscheinungsjahr

2011-12

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• 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 ∼1 μm and a thickness of 300 nm or hexapods with a diameter of ∼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 Fe 3+ , 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 50 th cycle. Uniform hexagonal-disk and hexapod α-FeOOH/rGO hybrids have been successfully prepared via a facile hydrothermal process using graphene sheets as effective surfactant to control the size and morphology of α-FeOOH crystals.