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Pure and Applied Chemistry

The Scientific Journal of IUPAC

Ed. by Burrows, Hugh / Weir, Ron / Stohner, Jürgen

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Online
ISSN
1365-3075
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Volume 78, Issue 10 (Jan 2006)

Issues

Core-shell Si/C nanocomposite as anode material for lithium ion batteries

Tao Zhang
  • Corresponding author
  • Department of Chemistry & Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, China
/ Lijun Fu
  • Corresponding author
  • Department of Chemistry & Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, China
/ Jie Gao
  • Corresponding author
  • Department of Chemistry & Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, China
/ Lichun Yang
  • Corresponding author
  • Department of Chemistry & Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, China
/ Yuping Wu
  • Corresponding author
  • Department of Chemistry & Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, China
/ Hoqing Wu
  • Corresponding author
  • Department of Chemistry & Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, China
Published Online: 2009-01-01 | DOI: https://doi.org/10.1351/pac200678101889

We report an effective method for the synthesis of a core-shell Si/C nanocomposite, and its application as anode material for lithium ion (Li-ion) batteries. Polyacrylonitrile (PAN)-coated Si nanoparticles are formed by emulsion polymerization, and this precursor is heat-treated under argon to generate a Si/C core-shell nanocomposite. The conductive carbon shell envelops the silicon nanoparticles and suppresses aggregation of the nanoparticles during cycling. Meanwhile, the carbon shell combines closely with the nanocores, and significantly enhances the kinetics of lithium intercalation and de-intercalation, as well as the apparent diffusion coefficient of Li-ions. Consequently, the core-shell Si/C nanocomposite exhibits better electrochemical performance than pure Si nanoparticles, indicating that this is a promising approach to improve cyclability and kinetics of nano-anode materials for Li-ion batteries.

Keywords: anode; core-shell; emulsion polymerization; Li-ion batteries; Si/C

Conference

International Symposium on Fine Chemistry and Functional Polymers (FCFP-XV) and the 1st International Symposium on Novel Materials and Synthesis (NMS-I), Novel Materials and their Synthesis, NMS, Novel Materials and their Synthesis, 15th, Shanghai, China, 2005-10-17–2005-10-20

About the article

Published Online: 2009-01-01

Published in Print: 2006-01-01


Citation Information: Pure and Applied Chemistry, ISSN (Online) 1365-3075, ISSN (Print) 0033-4545, DOI: https://doi.org/10.1351/pac200678101889. Export Citation

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