Flexible binder-free silicon/silica/carbon nanofiber composites as anode for lithium-ion batteries

Dirican M., Yildiz O., Lu Y., Fang X., Jiang H., Kızıl H., ...More

ELECTROCHIMICA ACTA, vol.169, pp.52-60, 2015 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 169
  • Publication Date: 2015
  • Doi Number: 10.1016/j.electacta.2015.04.035
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.52-60
  • Istanbul Technical University Affiliated: Yes


High-capacity flexible electrode materials for high-energy lithium-ion batteries become critically important with technological improvements on portable and bendable electronic equipment such as rollup displays, implantable medical devices, active radio-frequency identification tags, and wearable devices. Although different types of bendable electrode materials have been introduced, it is very important to fabricate highly-flexible electrode materials with reasonable fabrication technique and high electrochemical performance similar to those of conventional high-capacity electrode materials. Herein, we introduced high-capacity, flexible Si/SiO2/C nanofiber composite anode materials by simple electrospinning and subsequent heat treatment processes. To further improve the long-term cycling performance, additional nanoscale carbon coating of flexible Si/SiO2/C nanofibers was performed by CVD technique. Electrochemical performance results showed that CVD carbon-coated flexible Si/SiO2/C nanofiber composites exhibited high capacity retention of 86.7% and high coulombic efficiency of 96.7% at the 50th cycle. It is, therefore, demonstrated that CVD carbon-coated flexible Si/SiO2/C nanofiber composites are promising anode material candidate for next-generation flexible and high-energy lithium-ion batteries. (C) 2015 Elsevier Ltd. All rights reserved.