Structurally tailored graphene nanosheets as lithium ion battery anodes: an insight to yield exceptionally high lithium storage performance
Structurally tailored graphene nanosheets as lithium ion battery anodes: an insight to yield exceptionally high lithium storage performance
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DOI：
10.1039/c3nr04823c
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发表时间：
2013-01-01
期刊：
影响因子：
6.7
通讯作者：
Sun, Xueliang
中科院分区：
文献类型：
--
作者：
Li, Xifei;Hu, Yuhai;Sun, Xueliang
如何将石墨烯纳米片（GNS）调整为不同的形貌一直是锂离子电池（LIB）面临的重大挑战。在这项研究中，三种类型的不同尺寸，边缘网站，缺陷和层数的GNS已成功实现。结果表明，控制GNS的形貌和微观结构对其在LIB中的循环性能和倍率性能具有重要影响。GNS阳极中减少的GNS层数、减小的尺寸、增加的边缘位点和增加的缺陷可高度有益于锂储存并导致增加的电化学性能。有趣的是，用水热方法处理的GNS提供了1348 mA h g（-1）的高可逆放电容量。这项研究表明，高性能GNS阳极的控制设计是LIB应用中的一个重要概念。
How to tune graphene nanosheets (GNSs) with various morphologies has been a significant challenge for lithium ion batteries (LIBs). In this study, three types of GNSs with varying size, edge sites, defects and layer numbers have been successfully achieved. It was demonstrated that controlling GNS morphology and microstructure has important effects on its cyclic performance and rate capability in LIBs. Diminished GNS layer number, decreased size, increased edge sites and increased defects in the GNS anode can be highly beneficial to lithium storage and result in increased electrochemical performance. Interestingly, GNSs treated with a hydrothermal approach delivered a high reversible discharge capacity of 1348 mA h g(-1). This study demonstrates that the controlled design of high performance GNS anodes is an important concept in LIB applications.