With the rising demand for electricity storage devices, the performance requirements for such equipment have become increasingly stringent. Lithium-sulfur (Li-S) batteries are poised to be among the next generation of energy storage systems. However, before they can be commercially viable, several challenges must be addressed, including low sulfur conductivity and the shuttle effect. Herein, polypyrrole based sulfur composite was prepared by simple method in hydrothermal teflon lined autoclave for Li-S battery. The S/SP/ppy/PVDF electrode exhibited the initial discharge capacity of 662 mAh g- 1 at 0.5 C and 637 mAh g- 1 after 100 cycles. The Coulombic efficiency was 96% all along charge/discharge cycling. Moreover, Li-S coin cells were assembled and tested to demonstrate the potential application and scale-up of the polypyrrole-sulfur composite.

Centre of Polymer Systems Tomas Bata University in Zlín Zlín 760 01 Czech Republic

Department of Inorganic Chemistry Faculty of Sciences Pavol Jozef Šafárik University in Košice Moyzesova 11 Kosice 04154 Slovak Republic

Department of Physical Chemistry Faculty of Sciences Pavol Jozef Šafárik University in Košice Moyzesova 11 Košice 04154 Slovak Republic

Institute of Materials Research Slovak Academy of Sciences Watsonova 47 Košice 040 01 Slovak Republic

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Conductive Polymer Thin Films for Energy Storage and Conversion: Supercapacitors, Batteries, and Solar Cells