Polythiophene lamella wrapped sulfur as cathode for rechargeable lithium sulfur batteries

Abstract We report the synthesis of a sulfur/polythiophene composite by wrapping micro-sized sulfur particles with polythiophene lamella. The polythiophene lamella with good conductivity and huge surface could help improve the cycling performance of micro-sized sulfur cathode. The first discharge capacity of sulfur/polythiophene was 1074.29 mAh g−1, the remaining capacity was 595.49 mAh g−1 after 90 cycles at a rate of 0.1 C.