用气纺丝法制备了氧化物复合碳纤维材料的前驱体,并通过惰性气氛800 ℃高温处理得到氧化物复合碳纤维纳米线.通过扫描电镜对所制得的纳米碳纤维进行显微结构分析,重点考察其作为锂离子电池负极材料的电化学性能.结果表明:CF-SnO2-Co3O4碳纤维作为负极主材组装的电池具有最佳的充放电性能,初次放电容量可达到1490 mAh/g,50次循环后比容量保持在599 mAh/g,电化学阻抗最小,倍率性能最好.因此,CF-SnO2-Co3O4碳纤维有希望成为一种性能优良的锂电池负极新材料.%Composite carbon fibers (CF) with SnO2and Co3O4were prepared by blowing spinning process and graphitized at 800 ℃, and their microstructures were examined by SEM. The composite carbon fibers were used as anode to assemble lithium ion batteries and the electrochemical performance of lithium ion batteries based on different anodes was tested. The batteries with CF-SnO2-Co3O4nanowires as anode show the best charge-discharge properties. The first discharge specific capacity is as high as 1490 mAh/g. After 50 charge/discharge cycles, the specific capacity is kept at 559 mAh/g. The electrochemical impedance of the batteries with CF-SnO2-Co3O4nanofiber as anode is minimum, which results in a good rate capability. The composite CF-SnO2-Co3O4nanofibers show promise to be a potential new material as anode.
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