【摘 要】
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The metal tin (Sn),as one potential anode material for lithium-ion batteries,rapidly degrades its cyclic performance due to huge volume expansion/contraction du
【机 构】
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School of Materials Science and Engineering, North Minzu University, Yinchuan 750021, China;School o
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The metal tin (Sn),as one potential anode material for lithium-ion batteries,rapidly degrades its cyclic performance due to huge volume expansion/contraction during lithium intercalation/de-intercalation process.Amorphous carbon was adopted as conductive and buffer matrix to form Sn/C composites.The products were prepared by hydrothermal reaction and carbothermal reduction using tin tetrachloride and glucose as raw materials.The composites were characterized by X-ray diffraction (XRD),Raman spectroscopy,scanning electron microscopy (SEM),transmission electron microscopy (TEM),cyclic voltammetry (CV) and galvanostatic charge/discharge measurements.The results show that relative smaller metallic tin particles in 1∶8 Sn/C composite are formed and distributed more uniformly in the carbon matrix.The lithium intercalation capacity of Sn/C composites reaches 820.4 mAh·g-1,and the capacity retention over 60 cycles remains 54.1%.1∶8 Sn/C composite exhibits enhanced rate performance and cyclic stability compared to 1∶5 and 1∶10 samples.
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