Three-dimensional interconnected network of graphene-wrapped porous silicon spheres: in situ magnesiothermic-reduction synthesis and enhanced lithium-storage capabilities.
Three-dimensional interconnected network of graphene-wrapped porous silicon spheres: in situ magnesiothermic-reduction synthesis and enhanced lithium-storage capabilities.
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DOI：
10.1021/am405725u
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发表时间：
2014-02
影响因子：
9.5
通讯作者：
Ping Wu;Hui Wang;Yawen Tang;Yiming Zhou;T. Lu
中科院分区：
文献类型：
--
作者：
Ping Wu;Hui Wang;Yawen Tang;Yiming Zhou;T. Lu
通过逐层组装和随后的原位镁热还原方法构建了一种新型的3D多孔Si-G微/纳米结构（即石墨烯包裹的多孔硅球的3D互连网络，Si@G网络）。与裸硅球相比，合成的Si@G网络在比容量、循环稳定性和倍率性能方面表现出显着增强的阳极性能，使其成为高能量、长寿命和高功率锂离子电池的理想阳极候选者。
A novel type of 3D porous Si-G micro/nanostructure (i.e., 3D interconnected network of graphene-wrapped porous silicon spheres, Si@G network) was constructed through layer-by-layer assembly and subsequent in situ magnesiothermic-reduction methodology. Compared with bare Si spheres, the as-synthesized Si@G network exhibits markedly enhanced anodic performance in terms of specific capacity, cycling stability, and rate capability, making it an ideal anode candidate for high-energy, long-life, and high-power lithium-ion batteries.