SubPc-Br/NiMoO4 composite as a high-performance supercapacitor electrode materials

In the present paper, a facile hydrothermal synthesis was successfully used to obtain a novel SubPhthalocyanine/Nickel molybdate (SubPc-Br/NiMoO 4 ) composite electrode material for a higher-performance super-capacitor. SEM and XRD investigations revealed that SubPc-Br particles were uniformly dispersed on the surface of NiMoO 4 microspheres and kept the crystal formation of NiMoO 4 during the combination of SubPc-Br and NiMoO 4 , giving the possibility to obtain high power density. The excellent pseudo-capacitance properties of SubPc-Br/NiMoO 4 were also confirmed by a series of electrochemical experiments and showed that SubPc-Br significantly enhanced the redox strength and charge transfer characteristics of the NiMoO 4 . The as-prepared electrode had a high specific capacitance of 1292 F g −1 at a scan rate of 1 mV s −1 . Additionally, in comparison with a separate NiMoO 4 , the cycle stability of the SubPc-Br/NiMoO 4 super-capacitor is improved by 12.9% after 1000 cycles. The enhanced performances could be mainly attributed to the unique nanostructure and a larger contact area of SubPc-Br/NiMoO 4 . The materials obtained using this technique and the unique properties of cycle stability are attractive. This technique has an increased potential to enlarge the applicability of the electrochemical industry. Graphic abstract