Abstract
Carbon-coated Zn-Al layer double oxide (Zn-Al-LDOs) is synthesized by hydrothermal-calcined method and investigated as an anode material for the Ni-Zn cells. The as-obtained products are characterized by scanning electron microscopy (SEM), energy dispersive X-ray spectrum (EDS), and X-ray diffraction (XRD), which prove that carbon-coated Zn-Al-LDOs are well-crystallized and carbon formed on the surface of Zn-Al-LDOs is amorphous. The electrochemical performances of the carbon-coated Zn-Al-LDOs electrode with different carbon content and pure Zn-Al-LDOs electrode are investigated by the cyclic voltammograms (CV), AC electrochemical impedance spectroscopy (EIS), Tafel plot (TAFEL), and galvanostatic charge-discharge (GCD) measurements. Compared with the pure Zn-Al-LDOs electrode, the carbon-coated Zn-Al-LDOs electrode shows better reversibility, higher specific capacity, and more excellent cycling performance.
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Acknowledgements
This work was financially supported by the National Natural Science Foundation of China (no. 21371180), Doctoral Fund of Ministry of Education of China (20130162110018), and the Science and Technology Project of Changsha City (no. k1303015-11).
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Zeng, X., Yang, Z., Long, J. et al. The effects of carbon coating on the electrochemical performance of Zn-Al layer double oxides in nickel-zinc secondary cells. Ionics 25, 1223–1233 (2019). https://doi.org/10.1007/s11581-018-2642-z
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DOI: https://doi.org/10.1007/s11581-018-2642-z