rGO-Incorporated MnMoS4 Composite as a High-Performance Electrode for Asymmetric Supercapacitors
摘要
Rational construction of hybrid nanostructures with complementary properties is a promising approach to overcome the limitations of single-component electrodes in supercapacitors. Herein, a MnMoS4/rGO composite is engineered, where ultrathin MnMoS4 nanosheets are uniformly anchored on conductive reduced graphene oxide to form a porous, interconnected framework. This architecture provides abundant electroactive sites from the multivalent states of Mn and Mo, while the rGO network ensures efficient charge transfer, OH− ion diffusion, and structural robustness. Benefiting from this synergy, the MnMoS4/rGO provides a high capacitance of 1573 F g−1 at 1 A g−1 and excellent rate characteristics. The MnMoS4/rGO//AC asymmetric supercapacitor operates stably at 1.6 V, achieving 47.3 Wh kg−1 at 799.4 W kg⁻1 and retaining 93% capacitance after 10,000 cycles. These findings demonstrate that integrating molybdenum sulfide with rGO effectively enhances interfacial charge transfer and long-term stability, offering a reliable pathway toward advanced energy storage devices.