Enhanced electrochemical properties of Li2ZnTi3O8/C nanocomposite synthesized with phenolic resin as carbon source |
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| Authors: | Yurong Ren Peng Lu Xiaobing Huang Jianning Ding Haiyan Wang |
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| Affiliation: | 1.School of Materials Science and Engineering, Jiangsu Collaborative Innovation Center of Photovolatic Science and Engineering,Changzhou University,Changzhou,China;2.Jiangsu Province Cultivation base for State Key Laboratory of Photovoltaic Science and Technology,Changzhou University,Changzhou,China;3.Jiangnan Graphene Research Institute,Changzhou,China;4.College of Chemistry and Chemical Engineering,Hunan University of Arts and Science,Changde,China;5.Micro/Nano Science and Technology Center,Jiangsu University,Zhenjiang,China;6.College of Chemistry and Chemical Engineering,Central South University,Changsha,China |
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| 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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