Hierarchical construction of reduced graphene oxide-polyaniline-NiMoS4 phases to enhance the asymmetric supercapacitor capacity

The ternary reduced graphene oxide (rGO)/polyaniline (PANI)@NiMoS 4 composite with the three-dimensional hierarchical structure was constructed by the in-situ chemical oxidation polymerization of aniline on GO surface, followed by the hydrothermal treatment . The grafted PANI cannot only provide the additional Faradaic redox reaction , but also support the rGO and NiMoS 4 , alleviating the self-stacking phenomenon for many ion transfer channels. The optimized rGO/PANI@NiMoS 4 exhibits the high specific capacity of 194 mAh/g at 0.75 A/g. Meanwhile, the corresponding rGO/PANI@NiMoS 4 //AC asymmetric supercapacitor also exhibits the high energy density of 30.75 Wh/kg at 1500 W/kg, and good cycle stability with capacity retention of 93 % after 6000 cycles. These satisfactorily electrochemical performances of rGO/PANI@NiMoS 4 composites reveal the potential supercapacitor application. This work provides an efficient way to increase the capacity of NiMoS 4 related electrode materials.