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@article{ART003241518},
author={Jueun Choi and Keiko Ideta and Hyeonseok Yi and Toru Kato and Koji Saito and Hiroko Watanabe and Koji Nakabayashi and Jin Miyawaki and Yoong Ahm Kim and Seong‑Ho Yoon},
title={Marine biomass-derived activated carbon as an electrode material for electric double-layer capacitors},
journal={Carbon Letters},
issn={1976-4251},
year={2025},
volume={35},
number={3},
pages={1221-1233},
doi={10.1007/s42823-024-00854-7}

TY - JOUR
AU - Jueun Choi
AU - Keiko Ideta
AU - Hyeonseok Yi
AU - Toru Kato
AU - Koji Saito
AU - Hiroko Watanabe
AU - Koji Nakabayashi
AU - Jin Miyawaki
AU - Yoong Ahm Kim
AU - Seong‑Ho Yoon
TI - Marine biomass-derived activated carbon as an electrode material for electric double-layer capacitors
JO - Carbon Letters
PY - 2025
VL - 35
IS - 3
PB - Korean Carbon Society
SP - 1221
EP - 1233
SN - 1976-4251
AB - Marine biomass (MB) offers an environmentally friendly and readily available carbon source from the ocean. However, the high concentration of alkali and alkaline earth metals (AAEMs) in MB typically reduces the carbon yield and inhibits micropore formation during heat treatment due to catalytic gasification. In this study, we successfully synthesized activated carbon (AC) with a high specific surface area (> 1,500 m2/g) and significant mesopore content (60%, mean pore size: 3.4 nm) from MB by employing preheating, controlled acid purification, and CO₂ activation. The formation of mesopores in the MB-derived AC was driven by catalytic gasification induced by intrinsic and residual AAEMs during preheating and physical activation processes. We evaluated the potential of the MB-derived AC as an electrode material for electric double-layer capacitors (EDLCs). The material demonstrated high specific capacitance values of 25.9 F/g and 29.4 F/g at 2.7 V and 3.3 V, respectively, during charge–discharge cycles. These high capacitance values at elevated voltages were attributed to the increased number of solvated ions (e.g., 1.93 mmol/g at 3.3 V) present in the mesopores. Fluorine-19 nuclear magnetic resonance (19F solid-state NMR) analysis revealed a substantial increase in solvated ion concentration within the mesopores of the MB-derived AC electrode at 3.3 V, demonstrating enhanced ion mobility and diffusion. These findings highlight the potential of MB-derived AC as a promising electrode material for high-voltage energy storage applications.
KW - Activated carbon;Electric double-layer capacitor;Marine biomass;Mesopore
DO - 10.1007/s42823-024-00854-7
ER -

Jueun Choi, Keiko Ideta, Hyeonseok Yi, Toru Kato, Koji Saito, Hiroko Watanabe, Koji Nakabayashi, Jin Miyawaki, Yoong Ahm Kim and Seong‑Ho Yoon. (2025). Marine biomass-derived activated carbon as an electrode material for electric double-layer capacitors. Carbon Letters, 35(3), 1221-1233.

Jueun Choi, Keiko Ideta, Hyeonseok Yi, Toru Kato, Koji Saito, Hiroko Watanabe, Koji Nakabayashi, Jin Miyawaki, Yoong Ahm Kim and Seong‑Ho Yoon. 2025, "Marine biomass-derived activated carbon as an electrode material for electric double-layer capacitors", Carbon Letters, vol.35, no.3 pp.1221-1233. Available from: doi:10.1007/s42823-024-00854-7

Jueun Choi, Keiko Ideta, Hyeonseok Yi, Toru Kato, Koji Saito, Hiroko Watanabe, Koji Nakabayashi, Jin Miyawaki, Yoong Ahm Kim, Seong‑Ho Yoon "Marine biomass-derived activated carbon as an electrode material for electric double-layer capacitors" Carbon Letters 35.3 pp.1221-1233 (2025) : 1221.

Jueun Choi, Keiko Ideta, Hyeonseok Yi, Toru Kato, Koji Saito, Hiroko Watanabe, Koji Nakabayashi, Jin Miyawaki, Yoong Ahm Kim, Seong‑Ho Yoon. Marine biomass-derived activated carbon as an electrode material for electric double-layer capacitors. 2025; 35(3), 1221-1233. Available from: doi:10.1007/s42823-024-00854-7

Jueun Choi, Keiko Ideta, Hyeonseok Yi, Toru Kato, Koji Saito, Hiroko Watanabe, Koji Nakabayashi, Jin Miyawaki, Yoong Ahm Kim and Seong‑Ho Yoon. "Marine biomass-derived activated carbon as an electrode material for electric double-layer capacitors" Carbon Letters 35, no.3 (2025) : 1221-1233.doi: 10.1007/s42823-024-00854-7

Jueun Choi; Keiko Ideta; Hyeonseok Yi; Toru Kato; Koji Saito; Hiroko Watanabe; Koji Nakabayashi; Jin Miyawaki; Yoong Ahm Kim; Seong‑Ho Yoon. Marine biomass-derived activated carbon as an electrode material for electric double-layer capacitors. Carbon Letters, 35(3), 1221-1233. doi: 10.1007/s42823-024-00854-7

Jueun Choi; Keiko Ideta; Hyeonseok Yi; Toru Kato; Koji Saito; Hiroko Watanabe; Koji Nakabayashi; Jin Miyawaki; Yoong Ahm Kim; Seong‑Ho Yoon. Marine biomass-derived activated carbon as an electrode material for electric double-layer capacitors. Carbon Letters. 2025; 35(3) 1221-1233. doi: 10.1007/s42823-024-00854-7

Jueun Choi, Keiko Ideta, Hyeonseok Yi, Toru Kato, Koji Saito, Hiroko Watanabe, Koji Nakabayashi, Jin Miyawaki, Yoong Ahm Kim, Seong‑Ho Yoon. Marine biomass-derived activated carbon as an electrode material for electric double-layer capacitors. 2025; 35(3), 1221-1233. Available from: doi:10.1007/s42823-024-00854-7

Jueun Choi, Keiko Ideta, Hyeonseok Yi, Toru Kato, Koji Saito, Hiroko Watanabe, Koji Nakabayashi, Jin Miyawaki, Yoong Ahm Kim and Seong‑Ho Yoon. "Marine biomass-derived activated carbon as an electrode material for electric double-layer capacitors" Carbon Letters 35, no.3 (2025) : 1221-1233.doi: 10.1007/s42823-024-00854-7