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Author

Lee, Kyu Tae
Electrochemical Energy Systems Laboratory
Research Interests
  • Electrode materials for Li-ion batteries

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One-Pot Synthesis of Tin-Embedded Carbon/Silica Nanocomposites for Anode Materials in Lithium-Ion Batteries

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Title
One-Pot Synthesis of Tin-Embedded Carbon/Silica Nanocomposites for Anode Materials in Lithium-Ion Batteries
Author
Hwang, JongkookWoo, Seung HeeShim, JongminJo, ChangshinLee, Kyu TaeLee, Jinwoo
Keywords
Amphiphilic diblock copolymers; Anode material; Carbon precursors; Carbon silicas; Coulombic efficiency; Cyclability; Functional hybrid materials; Functional nanocomposites; High specific capacity; Lithium-ion battery; Mesostructured; Nano-structured; One pot; One-pot synthesis; Selective interaction; Sn nanoparticles; Tetraethyl orthosilicates; Unique morphologies
Issue Date
201302
Publisher
AMER CHEMICAL SOC
Citation
ACS NANO, v.7, no.2, pp.1036 - 1044
Abstract
We report a facile "one-pot" method for the synthesis of Sn-embedded carbon-silica (CS) mesostructured (nanostructured) composites through the selective interaction of resol (carbon precursor), tetraethylorthosilicate (TEOS), and tributylphenyltin (Sn precursor) with an amphiphilic diblock copolymer, poly(ethylene oxide-b-styrene), PEO-b-PS. A unique morphology transition from Sn nanowires to spherical Sn nanoparticles embedded in CS framework has been obtained. Metallic Sn species are homogeneously embedded in a rigid CS framework and are effectively confined within the nanostructures. The resulting composites are used as anode materials for lithium-ion batteries and exhibit high specific capacities (600 mA h g(-1) at a current density of 45 mA g(-1), and 440 mA h g(-1) at a current density of 300 mA g(-1)) and an excellent cyclability of over 100 cycles with high Coulombic efficiency. Most of all, the novel method developed in this work for synthesizing functional hybrid materials can be extended to the preparation of various functional nanocomposites owing to its versatility and facileness.
URI
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DOI
http://dx.doi.org/10.1021/nn303570s
ISSN
1936-0851
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