Preparation of CoS1.097-NiS-MoS2 battery-type electrode material by sulfuration of ZIF-67/NiMoO4 for hybrid supercapacitor application

Designing promising electrode material for supercapacitor application with rich redox activities, high capacity and great cycling stability has become a research priority. Herein, a nanohybrid (CoS 1.097 -NiS-MoS 2 ) with nanosheets combining nanorods morphology is prepared by high-temperature pyrolysis sulfuration of ZIF-67/NiMoO 4 . Co-existence of multiple crystalline phases is favorable for enriching electrochemical active sites and facilitating electron transfer. Consequently, CoS 1.097 -NiS-MoS 2 displays better supercapacitor performance with a specific capacity of 373.6 C g −1 at current density of 1 A g −1 and excellent cycling stability of 70.01% after 3000 cycles, surpassing CoS 1.097 (49.1 C g −1 ; 59.26%) and NiS-MoS 2 (105.8 C g −1 ; 62.00%). Moreover, a hybrid supercapacitor is assembled with CoS 1.097 -NiS-MoS 2 and activated carbon, exhibiting high energy density of 21.0 Wh kg −1 at 800 W kg −1 . This work opens a path for preparation of promising ternary metal sulfide-based materials for the field of energy storage.