期刊
RARE METALS
卷 38, 期 10, 页码 996-1002出版社
NONFERROUS METALS SOC CHINA
DOI: 10.1007/s12598-019-01289-0
关键词
Lithium-ion battery; Tin; carbon composite; Hydrothermal method; Electrochemical performance
资金
- Ningxia Natural Science Fund [NZ17096]
- Ningxia Science Research Project for Colleges [NGY2016148]
- Project from Ningxia Key Laboratory of Powder Materials and Special Ceramics [1603]
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 center dot 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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