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A Polysulfide-Infiltrated Carbon Cloth Cathode for High-Performance Flexible Lithium–Sulfur Batteries

School of Chemical Engineering, Chonnam National University, 77 Yongbongro, Buk-gu, Gwangju 61186, Korea
Division of Electron Microscopy Research, Korea Basic Science Institute (KBSI), Daejeon 34133, Korea
Department of Biological Engineering, Inha University, 100 Inha-ro, Nam-gu, Incheon 22212, Korea
Authors to whom correspondence should be addressed.
Nanomaterials 2018, 8(2), 90;
Received: 10 January 2018 / Revised: 26 January 2018 / Accepted: 29 January 2018 / Published: 7 February 2018
(This article belongs to the Special Issue Nanomaterials and Nanoengineering for Sulfur-Based Batteries)
PDF [2052 KB, uploaded 7 February 2018]


For practical application of lithium–sulfur batteries (LSBs), it is crucial to develop sulfur cathodes with high areal capacity and cycle stability in a simple and inexpensive manner. In this study, a carbon cloth infiltrated with a sulfur-containing electrolyte solution (CC-S) was utilized as an additive-free, flexible, high-sulfur-loading cathode. A freestanding carbon cloth performed double duty as a current collector and a sulfur-supporting/trapping material. The active material in the form of Li2S6 dissolved in a 1 M LiTFSI-DOL/DME solution was simply infiltrated into the carbon cloth (CC) during cell fabrication, and its optimal loading amount was found to be in a range between 2 and 10 mg/cm2 via electrochemical characterization. It was found that the interwoven carbon microfibers retained structural integrity against volume expansion/contraction and that the embedded uniform micropores enabled a high loading and an efficient trapping of sulfur species during cycling. The LSB coin cell employing the CC-S electrode with an areal sulfur loading of 6 mg/cm2 exhibited a high areal capacity of 4.3 and 3.2 mAh/cm2 at C/10 for 145 cycles and C/3 for 200 cycles, respectively, with minor capacity loss (<0.03%/cycle). More importantly, such high performance could also be realized in flexible pouch cells with dimensions of 2 cm × 6 cm before and after 300 bending cycles. Simple and inexpensive preparation of sulfur cathodes using CC-S electrodes, therefore, has great potential for the manufacture of high-performance flexible LSBs. View Full-Text
Keywords: lithium–sulfur batteries; flexible batteries; carbon cloth; microporous carbon; catholytes lithium–sulfur batteries; flexible batteries; carbon cloth; microporous carbon; catholytes

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Song, J.-Y.; Lee, H.-H.; Hong, W.G.; Huh, Y.S.; Lee, Y.S.; Kim, H.J.; Jun, Y.-S. A Polysulfide-Infiltrated Carbon Cloth Cathode for High-Performance Flexible Lithium–Sulfur Batteries. Nanomaterials 2018, 8, 90.

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