Carbon Letters 2025 KCI Impact Factor : 0.73 KCI-WoS Impact Factor : 6.26
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pISSN : 1976-4251 / eISSN : 2233-4998
- https://journal.kci.go.kr/carbon
KJCKorea
Journal Central
Electrochemical performance of microporous carbons derived from oak wood for electric double-layer capacitor
- Carbon Letters
- Abbr : Carbon Lett.
- 2025, 35(5), pp.2381~2394
- DOI : 10.1007/s42823-025-00931-5
- Publisher : Korean Carbon Society
- Research Area : Natural Science > Natural Science General > Other Natural Sciences General
- Received : December 29, 2024
- Accepted : May 26, 2025
- Published : December 11, 2025
Hyeon‑Hye Kim
1,
Ju‑Hwan Kim
2,
Jin‑Soo Jeong
1,
Hye‑Min Lee
3,
Kay‑Hyeok An
1,
Byung‑Joo Kim
1
1전주대학교
2전남대학교
3(재)한국탄소산업진흥원
Accredited
ABSTRACT
Electric double-layer capacitors (EDLCs) have attracted significant interest as a promising energy storage solution because of their high-power density, exceptional charge/discharge cycle stability, and extended lifespan. Porous carbon is a key component of EDLCs given its outstanding chemical stability, high electrical conductivity, large specific surface area, and cost effectiveness. We fabricated porous carbon from oak wood as a raw material using an environment-friendly steam activation process (physical activation). Pretreatment (stabilization) was conducted using a mild acid (phosphoric acid) to achieve a high specific surface area and maintain structural stability. Oak wood-derived porous carbon (Oak-PC) produced with varying activation times following phosphate stabilization achieved high specific surface area (1050–1990 m2/g), pore volume (0.44–0.95 cm3/g), and carbonization yield (36%). Oak-PC retained ~ 90% of its performance at a high current density (10 A/g), demonstrating superior EDLC performance compared to that of commercial porous carbon. These results were attributed to the significant enhancement of the electrical properties of Oak-PCs, achieved by removing char through phosphate stabilization and strengthening bond stability. This study provides foundational data for developing sustainable energy storage technologies and enhancing the efficiency of next-generation energy storage systems by utilizing environment-friendly biomass materials such as oak wood.
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