Biomass-Derived Porous Carbon Prepared from Egg White for High-performance Supercapacitor Electrode Materials

摘要

Using egg white as raw material, the activated carbon materials with nitrogen doping were synthesized by a two-step method involving carbonization and activation. Structure character- ization showed this porous carbon had a three-dimensional honeycomb structure composed of interconnected micropores and mesopores, which resulted in a high specific surface area of 2918 m2g~(-1).Due to KOH activation, the appropriate ratio of micropore to mesopore could optimize the diffusion channel of electrolyte ion and increase the contact area between electro- lyte and electrode. Thus the egg white-derived porous carbon (EWC) showed outstanding electrochemical properties as supercapacitor electrode.