Facile Synthesis of SiO2@C Nanoparticles Anchored on MWNT as High-Performance Anode Materials for Li-ion Batteries
Loading...
Date
2017
Authors
Zhao, Yan
Liu, Zhengjun
Zhang, Yongguang
Mentbayeva, Almagul
Wang, Xin
Maximov, M. Yu.
Liu, Baoxi
Bakenov, Zhumabay
Yin, Fuxing
Journal Title
Journal ISSN
Volume Title
Publisher
Nanoscale Research Letters
Abstract
Carbon-coated silica nanoparticles anchored on multi-walled carbon nanotubes (SiO2@C/MWNT composite) were synthesized via a simple and facile sol-gel method followed by heat treatment. Scanning and transmission electron microscopy (SEM and TEM) studies confirmed densely anchoring the carbon-coated SiO2 nanoparticles onto a flexible MWNT conductive network, which facilitated fast electron and lithium-ion transport and improved structural stability of the composite. As prepared, ternary composite anode showed superior cyclability and rate capability compared to a carbon-coated silica counterpart without MWNT (SiO2@C). The SiO2@C/MWNT composite exhibited a high reversible discharge capacity of 744 mAh g−1 at the second discharge cycle conducted at a current density of 100 mA g−1 as well as an excellent rate capability, delivering a capacity of 475 mAh g−1 even at 1000 mA g−1. This enhanced electrochemical performance of SiO2@C/MWNT ternary composite anode was associated with its unique core-shell and networking structure and a strong mutual synergistic effect among the individual components.
Description
Keywords
Lithium-ion battery, anode, SiO2@C/MWNT composite, sol-gel synthesis
Citation
Zhao et al.(>8), 2017, Facile Synthesis of SiO2@C Nanoparticles Anchored on MWNT as High-Performance Anode Materials for Li-ion Batteries, Nanoscale Research Letters