In situ growth of Si nanowires on graphene sheets for Li-ion storage
In situ growth of Si nanowires on graphene sheets for Li-ion storage
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DOI：
10.1016/j.electacta.2012.04.046
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发表时间：
2012-07-15
影响因子：
6.6
通讯作者：
Yan, Qingyu
中科院分区：
文献类型：
--
作者：
Lu, Ziyang;Zhu, Jixin;Yan, Qingyu
采用超临界流体-液体-固体（SFLS）工艺在石墨烯纸中成功制备了Si纳米线，作为锂离子电池的负极材料，具有较高的比容量和充放电循环稳定性。Si/石墨烯复合纳米结构的容量和循环稳定性的增强归因于混合样品中作为高导电框架的石墨烯纸的存在以及在锂化/脱锂过程中吸收Si纳米线的体积变化。这种Si/石墨烯电极在420 mA g（-1）的电流密度下在第30次循环中保持1400 mAh g（-1）的可逆容量，这比纯Si纳米线的可逆容量好得多。(C)2012爱思唯尔有限公司保留所有权利。
Si nanowires in graphene papers were successfully prepared by supercritical fluid-liquid-solid (SFLS) process, which showed high specific capacities and charge-discharge cycling stability as anode materials for Li-ion storage. The enhancement on capacity and cycling stability of the Si/graphene composite nanostructures was attributed to the presence of graphene papers in the hybrid samples that served as a highly conductive framework and absorption of volume changes of Si nanowires during the lithiation/delithiation process. This Si/graphene electrodes maintained reversible capacities of 1400 mAh g(-1) for the 30th cycle at a current density of 420 mA g(-1), which is much better as compared to that of pure Si nanowires. (C) 2012 Elsevier Ltd. All rights reserved.