화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.84, 393-399, April, 2020
DOI10.1016/j.jiec.2020.01.027  Export Citation
Ecklonia cava based mesoporous activated carbon for high-rate energy storage devices
Kue-Ho Kim1, Dong-Yo Shin2, and Hyo-Jin Ahn1, 2, †
  • 1Department of Materials Science and Engineering, Seoul National University of Science and Technology, Seoul, 01811, South Korea
  • 2Program of Materials Science & Engineering, Convergence Institute of Biomedical Engineering and Biomaterials, Seoul National University of Science and Technology, Seoul, 01811, South Korea
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Activated carbon has received enormous global attention as an electrode material for electrical double layer capacitors (EDLCs) due to its superior electrochemical performance. But while manufacturing high-quality activated carbon as an electrode material, overcoming limitations such as depletion of raw material resources, poor high-rate performance, and cycle stability is still a significant challenge. To address these limitations, we firstly suggest a novel mesoporous activated carbon derived from ecklonia cava (Meso-ACDE) using an acid-base reaction and KOH activation processes. The optimized Meso-ACDE electrode showed a superior specific capacitance of 182 F g-1 at the current density of 0.2 A g-1 and a high-rate capacitance of 154 F g-1 at the current density of 20.0 A g-1 with an excellent cycling stability up to 2000 cycles. The enhanced electrochemical performance of the Meso-ACDE electrode was mainly attributed to the well-developed mesoporous structure with a high concentration of oxygen related functional groups, which were acquired during the activation process. Thus, we believe that the Meso-ACDE could be a promising alternative to conventional activated carbon for high-performance EDLCs.
Keywords:Electrical double-layer capacitors;Activated carbon;Ecklonia cava;Mesoporous structure;Rate performance
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