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Issue 17, 2011
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Sandwich-type functionalized graphene sheet-sulfur nanocomposite for rechargeable lithium batteries

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Abstract

A functionalized graphene sheet-sulfur (FGSS) nanocomposite was synthesized as the cathode material for lithium–sulfur batteries. The structure has a layer of functionalized graphene sheets/stacks (FGS) and a layer of sulfur nanoparticles creating a three-dimensional sandwich-type architecture. This unique FGSS nanoscale layered composite has a high loading (70 wt%) of active material (S), a high tap density of ∼0.92 g cm−3, and a reversible capacity of ∼505 mAh g−1 (∼464 mAh cm−3) at a current density of 1680 mA g−1 (1C). When coated with a thin layer of cation exchange Nafion film, the migration of dissolved polysulfide anions from the FGSS nanocomposite was effectively reduced, leading to a good cycling stability of 75% capacity retention over 100 cycles. This sandwich-structured composite conceptually provides a new strategy for designing electrodes in energy storage applications.

Graphical abstract: Sandwich-type functionalized graphene sheet-sulfur nanocomposite for rechargeable lithium batteries

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Publication details

The article was received on 10 Nov 2010, accepted on 08 Mar 2011 and first published on 30 Mar 2011


Article type: Paper
DOI: 10.1039/C0CP02477E
Citation: Phys. Chem. Chem. Phys., 2011,13, 7660-7665
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    Sandwich-type functionalized graphene sheet-sulfur nanocomposite for rechargeable lithium batteries

    Y. Cao, X. Li, I. A. Aksay, J. Lemmon, Z. Nie, Z. Yang and J. Liu, Phys. Chem. Chem. Phys., 2011, 13, 7660
    DOI: 10.1039/C0CP02477E

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