Abstract
ZnWO4, as an environment-friendly and economic material, has the potential for Li ion batteries (LIB) application. In this paper, a facile method has been developed to synthesize ZnWO4 supported on the reduced graphene oxide (RGO) to improve its LIB performance. The cuboid-like ZnWO4 nanocrystals are prepared by directly adding Na2WO4 powders into the graphene oxide/Zn aqueous solution followed by a hydrothermal treatment. The high-resolution TEM, XRD and XPS characterizations were employed to demonstrate structural information of the as-prepared ZnWO4/RGO hybrids carefully. Besides, we also discussed the LIB properties of the hybrids based on the detailed galvanostatic charge-discharge cycling tests. As a result, the specific capacity of the as-prepared ZnWO4/RGO hybrids reached more than 477.3 mA h g−1 after 40 cycles at a current density of 100 mA g−1 (only less than 159 mA g−1 for bare ZnWO4). During the whole cyclic process, the coulombic efficiency steadily kept the values higher than 90%.
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Wang, X., Li, B., Liu, D. et al. ZnWO4 nanocrystals/reduced graphene oxide hybrids: Synthesis and their application for Li ion batteries. Sci. China Chem. 57, 122–126 (2014). https://doi.org/10.1007/s11426-013-4983-9
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DOI: https://doi.org/10.1007/s11426-013-4983-9