CARBONIZED CHICKEN EGGSHELL MEMBRANE WITH A HIERARCHICAL 3D ARCHITECTURE AS A HIGH ENERGY SUPERCAPACITOR ELECTRODE

摘要

The increasing market for portable electronic device and hybrid vehicle leads to the demand of high-performance electrochemical capacitors (ECs). The current commercial available supercapacitors are mainly electrical double-layer capacitors (EDLCs), based on the accumulation of charge in the double layer formed at the interface between electrode and electrolyte. Porous carbons, especially activated carbons are regarded as the first candidate electrode materials for EDLCs due to their high surface areas, tunable structures, good conductivities and low cost . One of the promising but unexplored biomasses for this application is the membranes of chicken eggshell which is largely available as a daily waste. Unlike other biomass, eggshell membrane has a unique porous structure which has been used as template to synthesis nanoscale materials. In this paper, we carbonized the eggshell membranes supported on glassy carbon disc in argon at 800°C, further activated it in air at 300°C and tested the feasibility of using it as electrode materials for supercapacitors. The as-prepared carbonized eggshell membrane (CESM) is named as CESM-AP and the further activated CESM is named as CESM-300. As a reference, the eggshell membrane is also chemically activated with KOH and leads to a high-surface area activated carbon powder (named as AC-KOH).