中文摘要：

采用碳热还原法在氮气保护下于管式炉中焙烧SiO、SnO。和碳的混合物，制备复合负极材料Si-SiO，-Sn／（：。通过X射线衍射（XRD）、扫描电镜（SEM）对材料的结构进行表征，通过电化学阻抗谱（EIS）和充放电测试对材料的电化学性能进行测试和分析。结果表明：900℃焙烧2h的样品由晶体锡、无定形硅及其氧化物和碳组成，首次放电比容量高达1144mAh·g^-1。10次循环后容量保持稳定，充放电效率保持较高状态。

英文摘要：

Si-SiO^x-Sn/C composite was prepared by using a carbon thermal reduction method to roast the mixture of SiO,SnO^x and carbon at a nitrogen atmosphere in a tube furnace. The composite material was characterized by X-ray diffraction （XRD）, scanning electron microscopy （SEM）. The electrochemical impedance spectroscopy （EIS） and charge-discharge test were applied to study the electrochemical perform ances. Results suggested that the composite synthesized at 900 ℃ for 2 h is mainly composed of cryctal Sn amorphous,Si and its oxides ,along with carbon. Electrochemical measurements show that the anode has a high specific dischage capacity of ca. 1 144 mAh · g^-1. After 10 cycles,the capacity remains at a stable and reversible with high coulomb efficiency.