Enhanced Li storage capacity in 3 nm diameter SnO2 nanocrystals firmly anchored on multiwalled carbon nanotubes

Yun Ho Jin, Kyung Mi Min, Seung Deok Seo, Hyun Woo Shim, Dong Wan Kim

Research output: Contribution to journalArticle

70 Citations (Scopus)

Abstract

A simple synthesis route is demonstrated for the preparation of hybrid nanocomposite electrodes with a combination of SnO2 nanoparticles and conducting multiwalled carbon nanotubes (MWCNTs) for Li ion battery applications. The MWCNTs were initially treated using strong acid solutions to generate functional groups with negative charges on their surfaces. For the formation of the nanocomposites, the next process was driven by the mutual electrostatic interactions between the functionalized MWCNTs and the Sn 4+ ion species and was followed by spontaneous oxidation during a hydrothermal reaction at 150 °C. The SnO2 nanoparticles with diameters of less than 3 nm were uniformly loaded onto the MWCNT surfaces, providing an extremely large Brunauer-Emmett-Teller (BET) surface area of ∼240 m2 g-1. Furthermore, we demonstrate that the incorporation of multiwalled carbon nanotubes gives rise to an enhanced reversible capacity estimated to be 420 mA h g-1 after 100 cycles, which is at least three times greater than that of pure SnO2 nanoparticles.

Original languageEnglish
Pages (from-to)22062-22067
Number of pages6
JournalJournal of Physical Chemistry C
Volume115
Issue number44
DOIs
Publication statusPublished - 2011 Nov 10

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

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