title: Synthesis of the Carbon-Coated Nanoparticle Co9S8and Its Electrochemical Performance as an Anode Material for Sodium-Ion Batteries.
abstract: A Co9S8/C nanocomposite is prepared using a solid-state reaction followed by a facile mechanical ball-milling treatment, with sucrose as the carbon source. The phases, morphologies, and detailed structures of the Co9S8/C nanocomposite are well-characterized using X-ray diffraction (XRD), X-ray photoelectron spectroscopy, and high-resolution transmission electron microscopy. When evaluated as an anode material for sodium-ion batteries, the Co9S8/C nanocomposite electrode displays a reversible capacity of ∼567 mA h g-1in the initial cycle and maintains a reversible capacity of ∼320 mA h g-1after 30 cycles, indicating a larger capacity and a stable cycling performance. For comparison, the electrochemical performances of Co9S8and Co9S8/C samples synthesized using the solid-state reaction are also displayed. The ex situ XRD and transmission electron microscopy tests demonstrate that Co9S8undergoes a conversion-type sodium storage mechanism.
authors: School of Material Science and Engineering, ‡State Key Laboratory of Luminescent Materials and Devices, and §School of Physics, South China University of Technology , Guangzhou 510640, China.
authors: Xudong
authors: X
authors: Liu
authors: School of Material Science and Engineering, ‡State Key Laboratory of Luminescent Materials and Devices, and §School of Physics, South China University of Technology , Guangzhou 510640, China.
authors: Huatao
authors: H
authors: Liu
authors: School of Material Science and Engineering, ‡State Key Laboratory of Luminescent Materials and Devices, and §School of Physics, South China University of Technology , Guangzhou 510640, China.
authors: Yanming
authors: Y
authors: Zhao
authors: School of Material Science and Engineering, ‡State Key Laboratory of Luminescent Materials and Devices, and §School of Physics, South China University of Technology , Guangzhou 510640, China.
authors: Youzhong
authors: Y
authors: Dong
authors: School of Material Science and Engineering, ‡State Key Laboratory of Luminescent Materials and Devices, and §School of Physics, South China University of Technology , Guangzhou 510640, China.
authors: Qinghua
authors: Q
authors: Fan
authors: School of Material Science and Engineering, ‡State Key Laboratory of Luminescent Materials and Devices, and §School of Physics, South China University of Technology , Guangzhou 510640, China.
authors: Quan
authors: Q
authors: Kuang