Solvothermal Fabrication of Hollow Nanobarrel‐Like ZnCo2O4 Towards Enhancing the Electrochemical Performance of Rechargeable Lithium‐Ion Batteries

ChemElectroChem - Tập 4 Số 9 - Trang 2218-2224 - 2017
Zhen Wang1, Qiang Ru1, Xiaoqiu Chen1, Qing Guo1, Bei Wang1, Xianhua Hou1, Shejun Hu1
1Guang dong Provincial Key Laboratory of Quantum Engineering and Quantum Materials, Guangdong Engineering Technology Research Center of Efficient Green Energy and Environmental Protection Materials, School of Physics and Telecommunication Engineering, South China Normal University, Guangzhou, 510006 China

Tóm tắt

AbstractHollow nanobarrel‐like ZnCo2O4 has been designed and synthesized by means of a simple solvothermal method and subsequent calcination. The obtained samples were systematically characterized by powder X‐ray diffraction (XRD), field emission scanning electron microscopy (FESEM), high‐resolution transmission electron microscopy (HRTEM), N2 adsorption–desorption experiments and X‐ray photoelectron spectroscopy (XPS). This hollow structure could not only relieve the volume expansion effect, but also facilitate the diffusion of lithium ions. We obtained a reversible lithium storage capacity of 1350 mAh g−1 even after 300 cycles at a current density of 500 mA g−1 with a voltage window of 0.01–3.0 V. As‐prepared samples demonstrate the high reversible capacity and excellent cycle life. The good cycling capability and high rate performance suggest that the material will be an attractive anode material for lithium‐ion batteries.

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