Facile Synthesis of SiO2@C Nanoparticles Anchored on MWNT as High-Performance Anode Materials for Li-ion Batteries

Yan Zhao, Zhengjun Liu, Yongguang Zhang, Almagul Mentbayeva, Xin Wang, M. Yu Maximov, Baoxi Liu, Zhumabay Bakenov, Fuxing Yin

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)

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.

Original languageEnglish
Article number459
JournalNanoscale Research Letters
Volume12
DOIs
Publication statusPublished - 2017
Externally publishedYes

Keywords

  • Anode
  • Lithium-ion battery
  • SiO@C/MWNT composite
  • Sol-gel synthesis

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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