A rationally designed composite of alternating strata of Si nanoparticles and graphene: a high-performance lithium-ion battery anode

Nanoscale. 2013 Sep 21;5(18):8586-92. doi: 10.1039/c3nr02435k.

Abstract

We have successfully fabricated a free-standing Si-re-G (reduced graphene) alternating stratum structure composite through a repeated process of filtering liquid exfoliated graphene oxide and uniformly dispersed Si solution, followed by the reduction of graphene oxide. The as-prepared free-standing flexible alternating stratum structure composite was directly evaluated as the anode for rechargeable lithium half-cells without adding any polymer binder, conductive additives or using current collectors. The half cells based on this new alternating structure composite exhibit an unexpected capacity of 1500 mA h g(-1) after 100 cycles at 1.35 A g(-1). Our rationally proposed strategy has incorporated the long cycle life of carbon and the high lithium-storage capacity of Si into one entity using the feasible and scalable vacuum filtration technique, rendering this new protocol as a readily applicable means of addressing the practical application challenges associated with the next generation of rechargeable lithium-ion batteries.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Electric Power Supplies*
  • Electrodes
  • Graphite / chemistry*
  • Ions / chemistry
  • Lithium / chemistry*
  • Nanoparticles / chemistry*
  • Oxides / chemistry
  • Silicon / chemistry*

Substances

  • Ions
  • Oxides
  • Graphite
  • Lithium
  • Silicon