High Volumetric Capacity Silicon-Based Lithium Battery Anodes by Nanoscale System Engineering
High Volumetric Capacity Silicon-Based Lithium Battery Anodes by Nanoscale System Engineering
复制标题
采用纳米级系统工程的高容量硅基锂电池阳极。
DOI：
10.1021/nl403231v
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发表时间：
2013-11-01
期刊：
影响因子：
10.8
通讯作者：
Zhi, Linjie
中科院分区：
文献类型：
--
作者：
Wang, Bin;Li, Xianglong;Zhi, Linjie
硅的纳米结构最近受到了极大的关注，因为它有可能应对硅的体积急剧变化，从而提高锂存储性能。不幸的是，这种变革性的材料设计原则通常受到硅相对较低的敲击密度的困扰，因此电池的体积容量(以及体积能量密度)一般。在这里，我们提出并演示了一种由织构硅@石墨化碳纳米线阵列组成的电极。这种独特的电极结构是基于纳米级系统工程战略设计的。由此产生的电极原型展示了前所未有的锂存储性能，特别是在体积容量方面，而不会损害电池的其他组件。该制备方法简单、可扩展，为同时在单个材料单元尺度和材料整体尺度上合理设计硅基电极提供了新的途径。
The nanostructuring of silicon (Si) has recently received great attention, as it holds potential to deal with the dramatic volume change of Si and thus improve lithium storage performance. Unfortunately, such transformative materials design principle has generally been plagued by the relatively low tap density of Si and hence mediocre volumetric capacity (and also volumetric energy density) of the battery. Here, we propose and demonstrate an electrode consisting of a textured silicon@graphitic carbon nanowire array. Such a unique electrode structure is designed based on a nanoscale system engineering strategy. The resultant electrode prototype exhibits unprecedented lithium storage performance, especially in terms of volumetric capacity, without the expense of compromising other components of the battery. The fabrication method is simple and scalable, providing new avenues for the rational engineering of Si-based electrodes simultaneously at the individual materials unit scale and the materials ensemble scale.