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Author

Park, Jongnam
Materials and Chemistry Lab (MCL)
Research Interests
  • Inorganic synthesis, microfluidics, nanomaterials, surface engineering, bioimaging

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Fabrication of Carbon Microcapsules Containing Silicon Nanoparticles-Carbon Nanotubes Nanocomposite for Anode in Lithium Ion Battery

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Title
Fabrication of Carbon Microcapsules Containing Silicon Nanoparticles-Carbon Nanotubes Nanocomposite for Anode in Lithium Ion Battery
Author
Bae, JoonwonPark, Jongnam
Keywords
Anode performance; Carbon precursors; Carbon shells; Cyclic performance; Free spaces; Half-cell tests; Lithium-ion battery; Microcapsules; Nanohybrids; Outer surface; Polymer layers; Polymer precursors; Polymerization method; Silicon nanoparticles; Thermal heating
Issue Date
201209
Publisher
KOREAN CHEMICAL SOC
Citation
BULLETIN OF THE KOREAN CHEMICAL SOCIETY, v.33, no.9, pp.3025 - 3032
Abstract
Carbon microcapsules containing silicon nanoparticles (Si NPs)-carbon nanotubes (CNTs) nanocomposite (Si-CNT@C) have been fabricated by a two step polymerization method. Silicon nanoparticles-carbon nanotubes (Si-CNT) nanohybrids were prepared with a wet-type beadsmill method. A polymer, which is easily removable by a thermal treatment (intermediate polymer) was polymerized on the outer surfaces of Si-CNT nanocomposites. Subsequently, another polymer, which can be carbonized by thermal heating (carbon precursor polymer) was incorporated onto the surfaces of pre-existing polymer layer. In this way, polymer precursor spheres containing Si-CNT nanohybrids were produced using a two step polymerization. The intermediate polymer must disappear during carbonization resulting in the formation of an internal free space. The carbon precursor polymer should transform to carbon shell to encapsulate remaining Si-CNT nanocomposites. Therefore, hollow carbon microcapsules containing Si-CNT nanocomposites could be obtained (Si-CNT@C). The successful fabrication was confirmed by scanning electron microscopy (SEM) and X-ray diffraction (XRD). These final materials were employed for anode performance improvement in lithium ion battery. The cyclic performances of these Si-CNT@C microcapsules were measured with a lithium battery half cell tests.
URI
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DOI
http://dx.doi.org/10.5012/bkcs.2012.33.9.3025
ISSN
1229-5949
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