POS3-0416
Hierarchical Porosity Engineering in Bio-Derived Carbon Electrodes via SWNT-Modified Precursors
When and Where
Nov 30, -0001
12:00am - 12:00am
Presenter(s)
KIM GIHOON (Chonnam National University)
Co-Author(s)
Abstract
Bio-derived carbon electrodes have been engineered through the incorporation of single-walled carbon nanotubes (SWNTs) into the precursors followed by KOH activation. The incorporation of SWNTs into the precursors establishes an interconnected conductive network throughout the carbon matrix, thereby reducing interfacial resistance and charge-transfer resistance. In parallel, KOH activation generates a hierarchical porous structure with increased electrolyte-accessible surface area and shortened ion-diffusion pathways. These two modifications play distinct yet complementary roles in enhancing electrochemical performance. Whereas either treatment alone yields only moderate improvement, their combined application produces a pronounced synergistic effect beyond that achievable by a single treatment. Compared with the pristine and individually modified electrodes, the dual-modified electrodes exhibit more nearly rectangular cyclic voltammetry profiles, larger enclosed areas, and stronger capacitive current responses, indicating improved electric double-layer charge storage, enhanced electrochemical reversibility, and more efficient utilization of accessible active sites. Consistently, their nearly symmetric galvanostatic charge-discharge profiles at elevated current densities indicate superior rate capability and stable capacitive behavior. Long-term cycling stability further confirms the electrochemical durability and structural robustness of the dual-engineered electrodes. Overall, these results demonstrate that integrating conductive nanocarbon networks with chemically activated hierarchical porosity is an effective and scalable strategy for engineering high-performance bio-derived carbon electrodes for supercapacitors.
