Solution-Grown Silicon Nanowires for Lithium-Ion Battery Anodes
Solution-Grown Silicon Nanowires for Lithium-Ion Battery Anodes
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DOI：
10.1021/nn901409q
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发表时间：
2010-03-01
期刊：
影响因子：
17.1
通讯作者：
Cui, Yi
中科院分区：
文献类型：
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作者：
Chan, Candace K.;Patel, Reken N.;Cui, Yi
将使用超临界流体-液体-固体（SFLS）方法合成的硅纳米线与无定形碳或碳纳米管混合组成的复合电极作为锂离子电池阳极进行评估。使用糖的热解对硅纳米线进行碳涂层被发现对于与材料进行良好的电子接触至关重要。发现使用多壁碳纳米管作为导电添加剂比使用无定形碳更有效地获得良好的循环行为。在30次循环中观察到1500 mAh/g的可逆容量。
Composite electrodes composed of silicon nanowires synthesized using the supercritical fluid-liquid-solid (SFLS) method mixed with amorphous carbon or carbon nanotubes were evaluated as Li-ion battery anodes. Carbon coating of the silicon nanowires using the pyrolysis of sugar was found to be crucial for making good electronic contact to the material. Using multiwalled carbon nanotubes as the conducting additive was found to be more effective for obtaining good cycling behavior than using amorphous carbon. Reversible capacities of 1500 mAh/g were observed for 30 cycles.