کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8017776 1517227 2015 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Hollow core-shell-structured Si-C composites as high-performance anodes for lithium-ion batteries
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
Hollow core-shell-structured Si-C composites as high-performance anodes for lithium-ion batteries
چکیده انگلیسی
Hollow core-shell-structured SiO@void@C composites were synthesized by chemical vapor deposition with acetylene gas, and they could be applied as anode materials for lithium ion (Li-ion) batteries. In addition, this structure was designed to accommodate the volume expansion during lithiation for high-performance Li-ion battery anodes. The structures and morphologies of the synthesized composites were characterized by scanning electron microscopy (SEM) and transmission electron microscopy (TEM), from which an egg-like structure was observed due to the deposition of carbon layers on the SiO surface. A void space between the particles and the shell was formed as well. The electrochemical tests of the as-prepared samples indicated that high capacity (1780 mAh/g at first cycle) and high Coulombic efficiency (50 cycles with 99.84%) were achieved in this core-shell structured SiO electrode. Therefore, the core-shell SiO/C nanocomposite exhibits better electrochemical performance than pure SiO nanoparticles, indicating that it is a promising material to improve the cyclability and kinetics of nano-anode materials for Li-ion batteries.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Letters - Volume 161, 15 December 2015, Pages 89-92
نویسندگان
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