ZnO-MnO₂ co-modified hierarchical porous carbon nanofiber film electrodes for high-energy density supercapacitors.

ABSTRACT: This study focuses on preparing composite hierarchical porous carbon nanofiber film that includes ZnO and MnO₂. Using electrospinning technology, hierarchical porous structure was introduced into the nanofibers, enhancing energy density through the synergistic effect of zinc oxide and manganese dioxide. The zinc-manganese dioxide co-modified hierarchical porous carbon nanofiber film (ZnMnO-HPC) exhibits outstanding electrochemical performance when used as supercapacitor electrode, with a specific capacity reaching 401.77 C/g at 0.5 A/g, and 201.29 C/g at high current density of 5 A/g. ZnMnO-HPC also exhibits remarkable energy density when assembled with activated carbon electrode into asymmetric capacitor, reaching 38.37 Wh/kg at a power density of 407 W/kg and 19.5 Wh/kg at a p

SUBMITTER: Luo Y 

PROVIDER: S-EPMC11845670 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature