Journal of Materials Science

, Volume 48, Issue 14, pp 4823–4833

A silicon nanoparticle/reduced graphene oxide composite anode with excellent nanoparticle dispersion to improve lithium ion battery performance

  • Rhet C. de Guzman
  • Jinho Yang
  • Mark Ming-Cheng Cheng
  • Steven O. Salley
  • K. Y. Simon Ng
Article

DOI: 10.1007/s10853-012-7094-7

Cite this article as:
de Guzman, R.C., Yang, J., Cheng, M.M. et al. J Mater Sci (2013) 48: 4823. doi:10.1007/s10853-012-7094-7

Abstract

Composite anodes of Si nanoparticles (SiNPs) and reduced graphene oxide (RGO) sheets with highly dispersed SiNPs were synthesized to investigate the performance-related improvements that particle dispersion can impart. Three composites with varying degrees of particle dispersions were prepared using different ultrasonication, and a combination of ultrasonication and surfactant. With more dispersed SiNPs, the capacity retention and rate performance as evaluated by galvanostatic cycling using increasing current density rates (500–2500 mA/g) also improved compared with anodes that have poor particle dispersion. These results demonstrate that better nanoparticle dispersion (small clusters to mono-dispersed particles) between the stable and the highly conducting RGO layers, allows the carbonaceous matrix material to complement the SiNP-Li+ electrochemistry by becoming highly involved in the charge–discharge reaction mechanisms as indicated by chronopotentiometry and cyclic voltammetry (CV). Particle dispersion improvement was confirmed to be a key component in a composite anode design to maximize Si for high-performance lithium ion battery (LIB) application.

Copyright information

© Springer Science+Business Media New York 2013

Authors and Affiliations

  • Rhet C. de Guzman
    • 1
  • Jinho Yang
    • 2
  • Mark Ming-Cheng Cheng
    • 2
  • Steven O. Salley
    • 1
  • K. Y. Simon Ng
    • 1
  1. 1.Department of Chemical Engineering and Materials ScienceWayne State UniversityDetroitUSA
  2. 2.Department of Electrical and Computer EngineeringWayne State UniversityDetroitUSA