Nitrogen-doped carbon/NiMoO4 nanospheres assembled by nanosheets and ultrasmall nanoparticles for supercapacitors

A novel and facile strategy was developed to prepare nitrogen-doped carbon/NiMoO 4 (NDC/NiMoO 4 ) nanospheres using cetyltrimethylammonium bromide–polyvinyl pyrrolidone–cyclohexane–water–ethanol microemulsion aggregation as a soft template. The prepared NDC/NiMoO 4 exhibited a marvelous specific capacitance of 1045 F g −1 at 1 A g −1 . After 10,000 cycles the specific capacity is 60% of the initial performance. The energy density reached 107.3 Wh kg −1 at a power density of 799.9 W kg −1 . The excellent electrochemical performance can be attributed to the unique morphology of NDC/NiMoO 4 and the abundant doped N and C elements. This study enables their application in high-performance supercapacitors.