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Title: | ZnWO4/SnO2@r-GO nanocomposite as an anode material for high capacity lithium ion battery |
Authors: | Brijesh K. Vinayraj S. Dhanush P.C. Bindu K. Nagaraja H.S. |
Issue Date: | 2020 |
Citation: | Electrochimica Acta Vol. 354 , , p. - |
Abstract: | Lithium ion battery (LIB) is widely used energy storage device. Herein, we report the preparation of ZnWO4/SnO2 nanocomposite and ZnWO4/SnO2@r-GO nanocomposite via solvothermal method. The structural, elemental and morphological properties of the prepared samples are characterized using x-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDAX), high-resolution transmission electron microscopy (HR-TEM), Brunauer-Emmett-Teller (BET) measurements, Raman spectroscopy and X-ray photoelectron spectroscopy (XPS) techniques. The prepared samples are tested as an anode for LIB. The ZnWO4/SnO2 (5%) nanocomposite delivers initial discharge capacity of 882 mAh g−1 at a current density of 100 mA g−1, while, the specific capacity increases with the increase of SnO2 upto 10% tested in present case. Further, ZnWO4/SnO2@r-GO nanocomposite exhibits a discharge capacity of 1486 mAh g−1 which is higher than that of ZnWO4/SnO2 nanocomposite. In addition, after 500 cycles ZnWO4/SnO2@r-GO nanocomposite exhibits 89.8% cycle life and 98% of discharge capacity retention. These results indicate that, ZnWO4/SnO2@r-GO nanocomposite is a promising anode material for LIB. © 2020 Elsevier Ltd |
URI: | https://doi.org/10.1016/j.electacta.2020.136676 http://idr.nitk.ac.in/jspui/handle/123456789/15946 |
Appears in Collections: | 1. Journal Articles |
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