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Issue 9, 2018, Issue in Progress
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In situ template synthesis of hierarchical porous carbon used for high performance lithium–sulfur batteries

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Abstract

Hierarchical porous carbon (HPC) consists of micropores, mesopores and macrospores which are synthesized by in situ formation of template followed by acid etching. The obtained pores are three-dimensional and interconnected, and evenly distributed in the carbon matrix. By adjusting the ratio of the raw materials, the high specific surface area and large pore volume is afforded. The obtained HPC-3 samples possess graphite flakes and locally graphited-carbon walls, which provide good electrical conductivity. These unique characteristics make these materials suitable cathode scaffolds for Li–S batteries. After encapsulating 61% sulfur into HPC-3 host, the S/HPC-3 composite exhibits excellent cycling stability, high columbic efficiency, and superior rate cycling as a cathode material. The S/HPC-3 composite cathode displays an initial discharge capacity of 1059 mA h g−1, and a reversible capacity of 797 mA h g−1 after 200 cycles at 0.2C. The discharge capacities of the S/HPC-3 composite cathode after every 10 cycles at 0.1, 0.2, 0.5, 1, and 2C are 1119, 1056, 982, 921, and 829 mA h g−1, respectively.

Graphical abstract: In situ template synthesis of hierarchical porous carbon used for high performance lithium–sulfur batteries

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Publication details

The article was received on 02 Dec 2017, accepted on 18 Jan 2018 and first published on 24 Jan 2018


Article type: Paper
DOI: 10.1039/C7RA12978E
RSC Adv., 2018,8, 4503-4513
  • Open access: Creative Commons BY license
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    In situ template synthesis of hierarchical porous carbon used for high performance lithium–sulfur batteries

    L. Long, X. Jiang, J. Liu, D. Han, M. Xiao, S. Wang and Y. Meng, RSC Adv., 2018, 8, 4503
    DOI: 10.1039/C7RA12978E

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