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Centrifugally spun porous carbon microfibers as interlayer for Li–S batteries

  • Meltem Yanilmaz
  • Abdullah M. AsiriEmail author
  • Xiangwu ZhangEmail author
Energy materials
  • 43 Downloads

Abstract

Lithium–sulfur (Li–S) batteries have attracted great interest owing to their high energy density. However, shuttling of polysulfides deteriorates the electrochemical performance of Li–S batteries and prevents their practical applications. Placing a conductive and porous interlayer structure between the cathode and the separator limits the shuttling effect and improves the cycling performance. Here, porous carbon microfibers are fabricated via a fast, safe and cost-effective centrifugal spinning approach and the resultant centrifugally spun porous carbon microfibers (CS-PCMFs) are evaluated for use as an interlayer in Li–S batteries. The highly porous fibrous structure is observed from SEM and TEM images, and a high initial discharge capacity of 1485 mAh g−1 is achieved. A high reversible capacity of 615 mAh g−1 is reached after 200 cycles at 0.2 C. In addition, the cell with CS-PCMF interlayer has low cell resistance of 25 O, whereas that of Li–S cell without interlayer is 55 O. Owing to the low cell resistance, the cell with CS-PCMF interlayer delivers the reversible capacity of around 600 mAh g−1 at 1 C, while the cell without interlayer exhibits a lower capacity of 250 mAh g−1. Therefore, this work provides a new approach for designing highly porous carbon microfiber interlayer for Li–S batteries with exceptional electrochemical performance.

Notes

Acknowledgements

This research was supported by The Scientific and Technology Research Council of Turkey (TUBITAK) under 2219 Grant program.

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Fiber and Polymer Science Program, Department of Textile Engineering, Chemistry and Science, Wilson College of TextilesNorth Carolina State UniversityRaleighUSA
  2. 2.Department of Textile EngineeringIstanbul Technical UniversityIstanbulTurkey
  3. 3.Center of Excellence for Advanced Materials ResearchKing Abdulaziz UniversityJeddahSaudi Arabia
  4. 4.Department of Chemistry, Faculty of ScienceKing Abdulaziz UniversityJeddahSaudi Arabia

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