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ISSN : 1225-0562(Print)
ISSN : 2287-7258(Online)
Korean Journal of Materials Research Vol.29 No.10 pp.623-630
DOI : https://doi.org/10.3740/MRSK.2019.29.10.623

Fabrication of Activated Porous Carbon Using Polymer Decomposition for Electrical Double-Layer Capacitors

Ki-Wook Sung1,Dong-Yo Shin2,Hyo-Jin Ahn1,2†
1 Department of Materials Science and Engineering, Seoul National University of Science and Technology, Seoul 01811, Republic of Korea
2 Program of Materials Science & Engineering, Convergence Institute of Biomedical Engineering and Biomaterials, Seoul National University of Science and Technology, Seoul 01811, Republic of Korea
Corresponding author
E-Mail : hjahn@seoultech.ac.kr (H.-J. Ahn, Seoul Nat'l Univ. of Sci. and Tech.)

Abstract

Because of their excellent stability and highly specific surface area, carbon based materials have received attention as electrode materials of electrical double-layer capacitors(EDLCs). Biomass based carbon materials have been studied for electrode materials of EDLCs; these materials have low capacitance and high-rate performance. We fabricated tofu based porous activated carbon by polymer dissolution reaction and KOH activation. The activated porous carbon(APC-15), which has an optimum condition of 15 wt%, has a high specific surface area(1,296.1 m2 g−1), an increased average pore diameter(2.3194 nm), and a high mesopore distribution(32.4 %), as well as increased surface functional groups. In addition, APC has a high specific capacitance(195 F g−1) at low current density of 0.1 A g−1 and excellent specific capacitance(164 F g−1) at high current density of 2.0 A g−1. Due to the increased specific surface area, volume ratio of mesopores, and surface functional groups, the specific capacitance and high-rate performance increased. Consequently, the tofu based activated porous carbon can be proposed as an electrode material for high-performance EDLCs.

고분자 융해 반응을 이용한 전기 이중층 커패시터용 다공성 활성탄 제조

성기욱1,신동요2,안효진1,2†
1서울과학기술대학교 신소재공학과
2서울과학기술대학교 의공학-바이오소재 융합 협동과정 신소재공학프로그램

초록

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