Collaborative Improvement Electrochemical Properties of Supercapacitor Electrodes by Loading MoS 2 Nanosheets on Biomass Hierarchical Porous Carbon

Abstract

MoS 2 , a typical two-dimensional transition metal sulfide nanomaterial, has attracted much attention for supercapacitor electrode materials due to its high theoretical capacity. Herein, MoS 2 nanosheets grown on a hierarchical porous carbon (HPGC) derived from pomelo peel are prepared via hydrothermal method. The curled MoS 2 nanosheets grow and uniformly distribute on the conductive hierarchical porous carbon matrix, which made the electrodes materials possess a high specific surface area (320.2 m 2 g −1 ). Simultaneously, the novel structure enhances the conductivity of MoS 2 , alleviates capacity attenuation and guarantees the interface stability. Furthermore, the MoS 2 /HPGC shows a great enhancement in supercapacitor performance and deliver a remarkable specific capacitance of 411.4 F g −1 at the current density of 0.5 A g −1 . The initial capacitance retention rate is approximately 94.3% after 2000 cycles. It turns out that the synergistic effects between the MoS 2 nanosheets and HPGC contribute to high specific capacity, excellent rate performance and ultra-long cycle life. This work provides a new idea for the design and development of MoS 2 composites as the electrode materials of supercapacitors.