CoS 2 @C catalyzes polysulfide conversion to promote the rate and cycling performances of lithium–sulfur batteries

A CoS 2 @C/MWCNT/S electrode exhibited a high initial capacity of 1329.5 mA h g −1 at a current density of 0.1 C and a reversible capacity of 1060.6 mA h g −1 after 100 cycles, with an 80% capacity retention rate.