Abstract
Li2ZnTi3O8/C nanocomposite has been synthesized using phenolic resin as carbon source in this work. The structure, morphology, and electrochemical properties of the as-prepared Li2ZnTi3O8 samples were analyzed by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscope (TEM), Raman spectroscopy (RS), galvanostatic charge–discharge, and AC impedance spectroscopy. SEM images show that Li2ZnTi3O8/C was agglomerated with a primary particle size of ca. 40 nm. TEM images reveal that a homogeneous carbon layer (ca. 5 nm) formed on the surface of Li2ZnTi3O8 particles which is favorable to improve the electronic conductivity and inhibit the growth of Li2ZnTi3O8 during annealing process. The as-prepared Li2ZnTi3O8/C composite with 6.0 wt.% carbon exhibited a high initial discharge capacity of 425 and 159 mAh g−1 at 0.05 and 5 A g−1, respectively. At a high current density of 1 A g−1, 95.5 % of its initial value is obtained after 100 cycles.
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Acknowledgments
This project was financially supported by the National Nature Science Foundation of China (Nos. 21576030 and 51304077), the Hunan Provincial Natural Science Foundation of China (No. 13JJ4100), the Opening Project of Material Corrosion and Protection Key Laboratory of Sichuan Province of China (Nos. 2014CL03 and 2014CL15), the Natural Science Foundation of the Jiangsu Higher Education Institutions of China (No. 15KJA150002), the Changzhou City Science and Technology Plan Projects (No. CE20150084), and the Priority Academic Program Development of Jiangsu Higher Education Institutions.
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Ren, Y., Lu, P., Huang, X. et al. Enhanced electrochemical properties of Li2ZnTi3O8/C nanocomposite synthesized with phenolic resin as carbon source. J Solid State Electrochem 21, 125–131 (2017). https://doi.org/10.1007/s10008-016-3330-4
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DOI: https://doi.org/10.1007/s10008-016-3330-4