Synergistic integration of MnCo2O4/MoS2 with rGO as positive electrode for enhanced electrochemical performance in asymmetric supercapacitors

A novel MnCo2O4/MoS2@rGO composite was synthesized to improve the electrochemical characteristics of supercapacitors. This composite combines the high pseudocapacitance of MnCo2O4, the excellent ion storage capability of MoS2, and the conductive support of reduced graphene oxide (rGO), addressing challenges related to energy density, cycle life, and conductivity. The MnCo2O4/MoS2@rGO composite demonstrates a remarkable specific capacitance of 1833 F g(-)(1) at 1 A g(-)(1). The resulting asymmetric supercapacitor (MnCo2O4/MoS2@rGO//AC) delivers a high specific energy of 75.6 Wh kg(-)(1) and a specific power of 1115 W kg(-)(1). Moreover, the composite retains 97.6% of its initial capacitance after 10,000 cycles at 1 A g(-)(1), demonstrating superior cycle life stability. The synergistic effects of MnCo2O4, MoS2, and rGO improve ion diffusion, conductivity, and structural stability, making this composite promising for high-performance asymmetric supercapacitor applications.