High performance g-C3N4 @NiMoO4/CoMoO4 electrode for supercapacitors

In this work, g-C 3 N 4 @NiMoO 4 /CoMoO 4 (gCN@NCM) was fabricated by a hydrothermal method. g-C 3 N 4 sheets were embedded in staggered NiMoO 4 /CoMoO 4 rods to form a three-dimensional structure. The prepared gCN@NCM exhibited good electrochemical performance of high specific capacitance (641.5 F/g) and excellent cycle stability (15.79% of capacitance lost after 8000 cycles). The specific capacitance of the gCN@NCM//active carbon (AC) device got 30% enhanced at the first 2000 cycles. Moreover, 110% of the original specific capacitance was still maintained after 10,000 cycles. These results indicate that the g-C 3 N 4 @NiMoO 4 /CoMoO 4 has great potential in supercapacitors. • Combining g-C 3 N 4 with ternary transition metal oxides helps to enhance the electrochemical performance. • The special three-dimensional structure provides large surface area for the redox reaction. • g-C 3 N 4 accumulating on the NiMoO 4 /CoMoO 4 rods limits the electrochemical properties. • g-C 3 N 4 based flexible supercapacitor exhibited excellent 110% of the original specific capacitance after 10,000 cycles.