Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10142300 | Materials Letters | 2018 | 5 Pages |
Abstract
In this research, silver-embedded silicon@silica (Si/Ag@SiOx) was successfully fabricated. The Ag nanoparticles were deposited on the surface of Si-core particles by self-selective electroless deposition, then SiOx-shell was generated by wet oxidation in a sealed Teflon-lined autoclave. With the aid of embedded-Ag nanoparticles, the powder resistivity of Si/Ag@SiOx is only 0.747â¯kΩ·cm, which is nearly 3.42â¯Ãâ¯104 times lower than that of silicon@silica (Si@SiOx). Benefiting from the double effects of SiOx-shell (mechanical buffering) and embedded-Ag (high electric conductivity), Si/Ag@SiOx presents excellent electrochemical performance as anode material for lithium ion batteries. The discharge capacity of Si/Ag@SiOx is up to 1453.2â¯mAhâ¯gâ1 after 100 cycles. Besides, Si/Ag@SiOx holds 334.8â¯mAhâ¯gâ1 higher capacity than Si@SiOx at current density of 8.4â¯Aâ¯gâ1 (2â¯C), which is attributed to rapid electron transport brought by the embedded-Ag nanoparticles.
Related Topics
Physical Sciences and Engineering
Materials Science
Nanotechnology
Authors
Xu Guojun, Jin Chenxin, Lan Yu, Liu Liekai, Kong Kaijie, Yang Xixi, Yue Zhihao, Li Xiaomin, Sun Fugen, Huang Haibin, Zhou Lang,