Capacitive behavior of MoS2 decorated with FeS2@carbon nanospheres

The composite hybrid with novel hierarchical structure composed of 1T/2H MoS 2 nanoflower and watermelon-like FeS 2 @carbon nanospheres (FeS 2 @C@MoS 2 ) were synthesized via a facile method. Morphologies and structures of the hybrid were investigated thoroughly by using SEM, TEM, XRD, Raman, XPS and BET. The optimized composite hybrid with an appropriate ratio of carbon, FeS 2 and MoS 2 performs a high specific capacitance (1321.4 F·g −1 at 2 A·g −1 ) and a capacitance retention rate of 81.2% at 6 A·g −1 after 1000 cycles charge-discharge. Such new material has the potential to be a strong competitor in high performance supercapacitor electrode materials, and this facile synthesized method can hopefully be applied or as a reference to develop other metal sulfide@MoS 2 hybrid or multiple sulfides hybrid.