Three-dimensional assembly of multiwalled carbon nanotubes for creating a robust electron-conducting network in silicon-carbon microsphere-based electrodes
Three-dimensional assembly of multiwalled carbon nanotubes for creating a robust electron-conducting network in silicon-carbon microsphere-based electrodes
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多壁碳纳米管的三维组装，用于在基于硅碳微球的电极中创建强大的电子传导网络
DOI：
10.1038/s41598-020-58338-3
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发表时间：
2020
影响因子：
4.6
通讯作者：
Teshima Katsuya
中科院分区：
文献类型：
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作者：
Kim Hyemin;Kim Dae-wook;Todoki Hitomi;Zettsu Nobuyuki;Teshima Katsuya
我们提出了一种改进基于纳米Si@C微球的聚合物无粘结剂负极循环性能的战略方法，方法是结合多壁碳纳米管(MW-CNTs)网络并进行碳二亚胺缩合反应，以在MW-CNTs和纳米Si@C微球之间形成强大的分子连接。场发射扫描电子显微镜显示，一维多壁碳纳米管均匀地包裹在单个的Si@C微球上，并通过晶间纳米空间相互交织。在结合处引入酰胺键主要有助于杂化电极的稳定和增强。用0.5 A g−1循环50次后，其可逆容量从81mAh.g−1提高到520mAh.g−1。这种与超分子组装相关的稳定性有望促进电子传导和传质动力学，从而提高Si@C负极的电化学性能。
We present a strategic approach to improve the cycle performance of a polymeric binder-free anode based on nano-Si@C microspheres by incorporating a multiwalled carbon nanotubes (MW-CNTs) network and performing carbodiimide-based condensation coupling to form a robust molecular-junction between MW-CNTs and nano-Si@C microspheres. Field-emission scanning electron microscopy reveals that one-dimensional MW-CNTs homogeneously wrapped the individual Si@C microspheres and they interwove through the intergranular nanospace. The incorporation of amide bonds at the junction primarily contributes to the stabilization and reinforcement of the hybrid electrodes. Their reversible capacity after 50 cycles with 0.5 A g−1was significantly improved from 81 mAh·g−1to 520 mAh·g−1. Such robustness associated with the supramolecularly assembled MW-CNTs is expected to facilitate electron conductivity and mass transfer kinetics, leading to enhanced electrochemical performance of the Si@C anode.
影响因子：
10.9
作者：
S. Okazaki;Kenta Hamai;A. F. Arif;T. Ogi;K. Okuyama
通讯作者：
S. Okazaki;Kenta Hamai;A. F. Arif;T. Ogi;K. Okuyama
影响因子：
11.9
作者：
Dae-wook Kim;N. Zettsu;Katsuya Teshima
通讯作者：
Dae-wook Kim;N. Zettsu;Katsuya Teshima
研究硅电极可逆和不可逆容量起源的见解
DOI：
--
发表时间：
2016
期刊：
影响因子：
--
作者：
D. Yu;Pui‐Kit Lee
通讯作者：
Pui‐Kit Lee