Enhanced electrochemical performance of CuCo2O4@nitrogen-doped carbon composite as a promising electrode for high-performance supercapacitors

• N-doped carbon material is prepared by pyrolysis of porous organic polymer. • Three-dimensional rimous structure of CuCo 2 O 4 is deposited on the N-doped carbon. • CuCo 2 O 4 @NDC composite as a positive electrode shows high capacitance (1107 F g −1 ). • Asymmetric supercapacitor CuCo 2 O 4 @NDC//NDC delivers high energy and power density. In this study, we report the preparation of a composite comprising the unique structure of copper cobaltite and N-doped porous carbon. This composite, designated CuCo 2 O 4 @NDC(1), features a meticulously engineered three-dimensional rimous architecture of CuCo 2 O 4 that facilitates extensive interfacial contact between the electrolyte solution and the electrode. Such a design is pivotal in enhancing both ion and electron transport, which significantly improves the material's ability to store charge. Simultaneously, the nitrogen-doped carbon materials (NDC) significantly improve electrochemical characteristics. In these modified materials, there is plentiful nitrogen doping and a high specific surface area, which boosts conductivity and electron transfer in carbon materials. The CuCo 2 O 4 @NDC(1) composite exhibits a high specific capacitance of 1107 F g −1 at 1 A g −1 and excellent cycling stability of 81 % after 1000 cycles. Moreover, the asymmetric supercapacitor assembled by CuCo 2 O 4 @NDC(1) (as a positive electrode) and NDC (as a negative electrode) displayed an energy density of 43.55 W h kg −1 at 800 W kg −1 .