Facile electrodeposition of Mn3O4 nanoparticles on wood-derived porous carbon for high-performance asymmetric supercapacitor

In this study, we report a facile method of anchoring Mn3O4 nanoparticles on the surface of wood-derived porous carbon via electrodeposition to enhance the specific capacitance and cycling performance of electrodes for supercapacitors. Owing to the synergistic effect of the natural tubular porous structures of wood-derived porous carbon and the high theoretical specific capacitance of Mn3O4, wood-derived porous carbon-Mn3O4 composites (WPC-Mn3O4) deliver a high specific capacitance (315 F g(-1) at the current density of 1 A g(-1)) and an outstanding cycling stability (91% of maximum capacitance after 10,000 cycles at 10 A g(-1)) in 1 M Na2SO4 electrolyte. Furthermore, the WPC-Mn3O4 and activated carbon (AC) assembled asymmetric supercapacitor (ASC) WPC-Mn3O4//AC delivers a high energy density of 34.85 Wh kg(-1) at 700.0 W kg(-1), demonstrating a high applicability in practical energy storage devices. The resultant WPC-Mn3O4 composites with excellent electrochemical properties are expected to be used as a potential cathode material for the development of high-performance supercapacitors.

Automated summary

In this study, Mn3O4 nanoparticles were anchored on wood-derived porous carbon surface via electrodeposition to enhance the performance of supercapacitor electrodes. The resulting composites showed high specific capacitance and cycling stability, with the assembled asymmetric supercapacitor demonstrating high energy density and applicability in practical energy storage devices. Wood-derived porous carbon-Mn3O4 composites are expected to be a potential cathode material for high-performance supercapacitors.