采用热解Sn(OH)4和淀粉混合物制备碳包覆纳米SnO2的方法合成了无定形碳包覆纳米SnO2.采用XRD、SEM、TEM、STEM-EDX以及充放电测试等手段对其结构、形貌和性能进行表征.结果表明，样品材料中无定形碳呈薄片状，被包覆的纳米SnO2（20~50nm）均匀分布在片状无定形碳中.产物中SnO2与碳的不同比例影响了产物的性能，样品（SnO2∶C＝1∶1）首次循环的可逆比容量达到404mAh·g-1, 20次循环内无明显衰减.
Amorphous carbon-coated nano-scale SnO2 powders were prepared by pyrolyzing the mixtures of starch and Sn(OH)4. The structure, morphology and properties of the sample were investigated by XRD, SEM，TEM，STEM-EDX and discharge-charge cycle. The results of XRD, SEM, TEM and STEM-EDX show that amorphous carbon of the sample is flaky and amorphous Carbon-coated SnO2 particles (20-50nm) are distributed in amorphous carbon uniformly. The results of discharge-charge cycle show that the different proportions between SnO2 and amorphous carbon lead to different discharge-charge performances. The specific capacity of the sample (SnO2∶C＝1∶1) reaches 404mAh/g which is even stable in twentieth cycle.
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