کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10142300 | 1646096 | 2018 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Enhanced conductive core-shell structured Si/Ag@SiOx particles as high performance anode material for lithium ion batteries
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
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.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Letters - Volume 233, 15 December 2018, Pages 228-232
Journal: Materials Letters - Volume 233, 15 December 2018, Pages 228-232
نویسندگان
Xu Guojun, Jin Chenxin, Lan Yu, Liu Liekai, Kong Kaijie, Yang Xixi, Yue Zhihao, Li Xiaomin, Sun Fugen, Huang Haibin, Zhou Lang,