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Issue 15, 2015
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Ternary-layered nitrogen-doped graphene/sulfur/ polyaniline nanoarchitecture for the high-performance of lithium–sulfur batteries

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Abstract

Ternary-layered nitrogen-doped graphene/sulfur/polyaniline (NGNS-S-PANI) nanoarchitecture was rationally designed and synthesized via a two-step liquid chemical deposition approach. The SEM and TEM images indicate that the nanocomposite NGNS-S-PANI consists of N-doped graphene-sheets, sulfur and PANI with a layered structure. The ternary-layered NGNS-S-PANI exhibits excellent electrochemical performance compared with the corresponding binary-layered nitrogen-doped graphene/sulfur (NGNS-S). A highest specific discharge capacity up to 1277.3 mA h g−1 at the first cycle and 693 mA h g−1 over 100 cycles at 0.5 C were achieved with enhanced Coulombic efficiency of 98.5%, representing a promising cathode material for lithium–sulfur batteries. The high electrochemical performance of NGNS-S-PANI can be attributed to its well-designed ternary-layered nanoarchitecture. The rough surface of the ternary-layered composite with an elastic polyaniline (PANI) coating helps to retard the diffusion of polysulfides and to alleviate the volumetric expansion; also the nitrogen-doped graphene improved the electrical conductivity of the matrix.

Graphical abstract: Ternary-layered nitrogen-doped graphene/sulfur/ polyaniline nanoarchitecture for the high-performance of lithium–sulfur batteries

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Publication details

The article was received on 12 Feb 2015, accepted on 09 Mar 2015 and first published on 09 Mar 2015


Article type: Paper
DOI: 10.1039/C5TA01195G
Citation: J. Mater. Chem. A, 2015,3, 8022-8027

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    Ternary-layered nitrogen-doped graphene/sulfur/ polyaniline nanoarchitecture for the high-performance of lithium–sulfur batteries

    K. Ding, Y. Bu, Q. Liu, T. Li, K. Meng and Y. Wang, J. Mater. Chem. A, 2015, 3, 8022
    DOI: 10.1039/C5TA01195G

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