Antimony-Doped SnO2 Nanopowders with High Crystallinity for Lithium-Ion Battery Electrode
Antimony-Doped SnO2 Nanopowders with High Crystallinity for Lithium-Ion Battery Electrode
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DOI：
10.1021/cm9007014
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发表时间：
2009-07
影响因子：
8.6
通讯作者：
Yude Wang;I. Djerdj;B. Smarsly;M. Antonietti
中科院分区：
文献类型：
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作者：
Yude Wang;I. Djerdj;B. Smarsly;M. Antonietti
以新型两亲性嵌段共聚物（“KLE”型，聚（乙烯-丁烯）-嵌段-聚（环氧乙烷））和简单锡试剂（SnCl 4和Sb（OC 2 H5）3）为原料，采用聚合物辅助溶胶-凝胶法制备了高结晶度的掺锑氧化锡（ATO）纳米粉体。通过热重分析（TGA）、粉末X射线衍射（XRD）、扫描电子显微镜（SEM）、透射电子显微镜（TEM）、N2吸附-脱附等温线和X射线光电子能谱（XPS）分析合成的样品。结果表明，该颗粒是具有5 - 8 nm初级颗粒尺寸的高结晶ATO纳米粉末，Sb确实被并入SnO 2晶体结构（钙钛矿SnO 2）中。将制备的样品用作锂离子电池的负极材料，对其充放电性能、循环伏安和循环性能进行了研究。在恒定放电电流下，观察到约2400 mA h g−1的高初始放电容量。
Antimony-doped SnO2 (ATO) nanopowders with high crystallinity were obtained by a polymer-assisted sol−gel process based on a novel amphiphilic block-copolymer (“KLE” type, poly(ethylene-co-butylene)-block-poly(ethylene oxide) and simple tin reagents (SnCl4 and Sb(OC2H5)3). As-synthesized samples were analyzed by Thermogravimetric analysis (TGA), powder X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron micrographs (TEM), N2 adsorption−desorption isotherms, and X-ray photoelectron spectroscopy (XPS). The results showed that the particles were the high crystalline ATO nanopowders of 5−8 nm primary particle size and the Sb was indeed incorporated into the SnO2 crystal structure (cassiterite SnO2). The as-prepared samples were used as negative electrode materials for lithium-ion batteries, whose charge−discharge properties, cyclic voltammetry, and cycle performance were examined. A high initial discharge capacity about 2400 mA h g−1 was observed at a constant discharge current ...