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Control of microspores of anthracite-based activated carbons for high-performance capacitors

  • Carbon Letters
  • Abbr : Carbon Lett.
  • 2025, 35(6), pp.3143~3152
  • DOI : 10.1007/s42823-025-00983-7
  • Publisher : Korean Carbon Society
  • Research Area : Natural Science > Natural Science General > Other Natural Sciences General
  • Received : July 9, 2025
  • Accepted : September 11, 2025
  • Published : December 11, 2025

Park Taeyoung 1 Kim Jang Hee 1 Jeong Hyeon Ji 2 Park Kwang Hyun 1 Kim Jungmo 3 Song Sung Ho 4 Shim, Wang-Geun ORD ID 5

1공주대학교
2공주대학교(천안공과대학)
3한국전기연구원
4국립공주대학교
5국립순천대학교

Accredited

ABSTRACT

Activated carbons with high micro-/meso-porosity derived from biomass are increasingly popular as sustainable materials. However, these carbons often struggle with low carbon content and limited structural stability. Here, we present Mongolian anthracite-based carbons synthesized via carbonization and chemical activation. Structural analysis shows that Act-MRA samples develop plate-like morphologies with reduced particle size and greater porosity as KOH content increases. The Act-MRA samples have a disordered carbon structure with small graphitic domains, even at higher KOH ratios without significant crystal defects. Notably, Act -MRA3 displays a large specific surface area and high pore volume, with well-developed micropores (7–20 Å) and mesopores (20–50 Å) that expand as KOH ratios rise. Electrochemical tests indicate that Act -MRA3 achieves high specific capacitance (220.6 F/g at 5 mV/s) and rate retention (~ 80% at 300 mV/s), owing to its optimized pore structure and enhanced ion transport. These findings underscore the importance of tailored pore structures and defect engineering in boosting activated carbon performance for energy storage.

Citation status

* References for papers published after 2024 are currently being built.

This paper was written with support from the National Research Foundation of Korea.