Facile fabrication of a three-dimensional coral-like silicon nanostructure coated with a C/rGO double layer by using the magnesiothermic reduction of silica nanotubes for high-performance lithium-ion battery anodes
Facile fabrication of a three-dimensional coral-like silicon nanostructure coated with a C/rGO double layer by using the magnesiothermic reduction of silica nanotubes for high-performance lithium-ion battery anodes
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利用二氧化硅纳米管的镁热还原，轻松制备涂有 C/rGO 双层的三维珊瑚状硅纳米结构，用于高性能锂离子电池阳极
DOI：
10.1016/j.jallcom.2020.158569
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发表时间：
2021-05
影响因子：
6.2
通讯作者：
Meili Chen
中科院分区：
文献类型：
--
作者：
Tianhao Wang;Xiang Ji;Fuzhong Wu;Wanliang Yang;Xinyi Dai;Xuejiao Xu;Jing Wang;Dan Guo;Meili Chen
硅的理论容量很大，被认为是下一代锂离子电池阳极的最佳选择，但它在循环过程中也会急剧膨胀。采用高温镁热还原法制备了C/rGO包覆的三维珊瑚状硅纳米结构（CL-Si@C/rGO）。系统的测试验证了独特的珊瑚状纳米结构，这是由镁热还原的SiO2纳米管在高温下形成的。CL-Si@C/rGO的内部空隙和外部C/rGO层可以分别有效地管理体积膨胀现象，同时提高电极的导电性。得益于保持电极完整性和这种独特纳米结构的外部C/rGO层的能力，CL-Si@C/rGO复合电极即使在2 A g-1的高电流密度下也可以保持739.1 mAh g-1的可逆放电比容量。此外，该复合电极在1A g-1的电流密度下从第3次循环到第100次循环表现出0.5%的容量损失。本研究为高性能硅基阳极的工业化生产提供了一种简单、经济、环保的工艺。
Silicon has an ultrahigh theoretical capacity and has been regarded as the best choice for next-generation lithium-ion battery anodes, but it also suffers from dramatic expansion during cycling. Herein, a novel three-dimensional coral-like Si nanostructure coated with C/rGO (CL-Si@C/rGO) was facilely prepared through the high-temperature magnesiothermic reduction of SiO2nanotubes, which were then coated with C/rGO. Systematic tests verified the unique coral-like nanostructure, which was formed by the magnesiothermic reduction of several SiO2nanotubes at high temperature. The internal voids and outer C/rGO layer of CL-Si@C/rGO could effectively manage the volume expansion phenomenon while enhancing the electrical conductivity of the electrode, respectively. Benefiting from the ability to maintain the electrode integrity and the outer C/rGO layer of this unique nanostructure, the CL-Si@C/rGO composite electrode could maintain a reversible specific discharge capacity of 739.1 mAh g−1, even at a high current density of 2 A g−1. Furthermore, this composite electrode exhibited a 0.5% capacity loss from the 3rd to the 100th cycle at a current density of 1 A g−1. This work provides a simple, economic, and environmentally friendly procedure for the industrial production of high-performance Si-based anodes.
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影响因子：
3.5
作者：
T. He;Mingwen Zhao;Weifeng Li;Xiaohang Lin;Xuejuan Zhang;Xiangdong Liu;Yueyuan Y. Xia;L. Mei
通讯作者：
T. He;Mingwen Zhao;Weifeng Li;Xiaohang Lin;Xuejuan Zhang;Xiangdong Liu;Yueyuan Y. Xia;L. Mei
DOI：
10.1039/ad9791600143
发表时间：
1979
期刊：
--
影响因子：
--
作者：
M. R. Palacín
通讯作者：
M. R. Palacín
影响因子：
13.3
作者：
Jianfeng Ye;Huijuan Zhang;Rong Yang;Xingguo Li;L. Qi
通讯作者：
Jianfeng Ye;Huijuan Zhang;Rong Yang;Xingguo Li;L. Qi
影响因子：
6.2
作者：
Lin-hui Zhu;Yan-li Chen;Changqing Wu;Ruixia Chu;Jie Zhang;Heng Jiang;Yibo Zeng;Ying Zhang
通讯作者：
Lin-hui Zhu;Yan-li Chen;Changqing Wu;Ruixia Chu;Jie Zhang;Heng Jiang;Yibo Zeng;Ying Zhang
影响因子：
64.8
作者：
Bao, Zhihao;Weatherspoon, Michael R.;Sandhage, Kenneth H.
通讯作者：
Sandhage, Kenneth H.