Nano Research

, Volume 4, Issue 3, pp 290–296

Hybrid silicon-carbon nanostructured composites as superior anodes for lithium ion batteries

Authors

  • Po-Chiang Chen
    • Mork Family Department of Chemical Engineering and Materials ScienceUniversity of Southern California
  • Jing Xu
    • Mork Family Department of Chemical Engineering and Materials ScienceUniversity of Southern California
  • Haitian Chen
    • Ming-Hsieh Department of Electrical EngineeringUniversity of Southern California
    • Ming-Hsieh Department of Electrical EngineeringUniversity of Southern California
Research Article

DOI: 10.1007/s12274-010-0081-x

Cite this article as:
Chen, P., Xu, J., Chen, H. et al. Nano Res. (2011) 4: 290. doi:10.1007/s12274-010-0081-x

Abstract

We have successfully fabricated a hybrid silicon-carbon nanostructured composite with large area (about 25.5 in2) in a simple fashion using a conventional sputtering system. When used as the anode in lithium ion batteries, the uniformly deposited amorphous silicon (a-Si) works as the active material to store electrical energy, and the pre-coated carbon nanofibers (CNFs) serve as both the electron conducting pathway and a strain/stress relaxation layer for the sputtered a-Si layers during the intercalation process of lithium ions. As a result, the as-fabricated lithium ion batteries, with deposited a-Si thicknesses of 200 nm or 300 nm, not only exhibit a high specific capacity of >2000 mA·h/g, but also show a good capacity retention of over 80% and Coulombic efficiency of >98% after a large number of charge/discharge experiments. Our approach offers an efficient and scalable method to obtain silicon-carbon nanostructured composites for application in lithium ion batteries.
https://static-content.springer.com/image/art%3A10.1007%2Fs12274-010-0081-x/MediaObjects/12274_2010_81_Fig1_HTML.gif

Keywords

Amorphous silicon carbon nanofibers lithium ion batteries hybrid nanostructured composite

Copyright information

© Tsinghua University Press and Springer-Verlag Berlin Heidelberg 2010