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Issue 14, 2013
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Sulfur embedded in metal organic framework-derived hierarchically porous carbon nanoplates for high performance lithium–sulfur battery

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Abstract

The wide-scale implementation of lithium–sulfur batteries is limited by their rapid capacity fading, which is induced by the pulverization of the sulfur cathode and dissolution of intermediate polysulfides. Herein, we reported the encapsulation of sulfur (S) into hierarchically porous carbon nanoplates (HPCN) derived from one-step pyrolysis of metal-organic frameworks (MOF-5). HPCN with an average thickness of ca. 50 nm exhibits a three-dimensional (3D) hierarchically porous nanostructure, high specific surface area (1645 m2 g−1) and large pore volume (1.18 cm3 g−1). When evaluated as a cathode for lithium–sulfur batteries, the HPCN–S composite demonstrates high specific capacity and excellent cycling performance. At a current rate of 0.1 C, the initial discharge capacity of HPCN–S is 1177 mA h g−1. Even at a current rate of 0.5 C, it still delivers a discharge capacity of 730 mA h g−1 after 50 cycles and the Coulombic efficiency is up to 97%. The enhanced electrochemical performance of HPCN–S is closely related to its well-defined 3D porous plate nanostructure which not only provides stable electronic and ionic transfer channels, but also plays a key role as a strong absorbent to retain polysulfides and accommodate volume variation during the charge–discharge process.

Graphical abstract: Sulfur embedded in metal organic framework-derived hierarchically porous carbon nanoplates for high performance lithium–sulfur battery

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Publication details

The article was received on 01 Jan 2013, accepted on 30 Jan 2013 and first published on 30 Jan 2013


Article type: Paper
DOI: 10.1039/C3TA00004D
Citation: J. Mater. Chem. A, 2013,1, 4490-4496
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    Sulfur embedded in metal organic framework-derived hierarchically porous carbon nanoplates for high performance lithium–sulfur battery

    G. Xu, B. Ding, L. Shen, P. Nie, J. Han and X. Zhang, J. Mater. Chem. A, 2013, 1, 4490
    DOI: 10.1039/C3TA00004D

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