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Pure and Applied Chemistry

The Scientific Journal of IUPAC

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

12 Issues per year


IMPACT FACTOR 2013: 3.112
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Core-shell Si/C nanocomposite as anode material for lithium ion batteries

Tao Zhang1 / Lijun Fu1 / Jie Gao1 / Lichun Yang1 / Yuping Wu1 / Hoqing Wu1

1Department of Chemistry & Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, China

Citation Information: Pure and Applied Chemistry. Volume 78, Issue 10, Pages 1889–1896, ISSN (Online) 1365-3075, ISSN (Print) 0033-4545, DOI: 10.1351/pac200678101889, January 2009

Publication History

Published Online:
2009-01-01

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

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