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2022 Vol.32, Issue 5 Preview Page
Fabrication and Electrochemical Characterization of N/S co-doped Carbon Felts for Electric Double-Layer Capacitors

전기이중층 커패시터용 질소/황이 동시에 도핑된 탄소 펠트의 제조 및 전기화학적 성능 평가

Byoung-Min Lee1
,
Je Moon Yun2†
,
Jae-Hak Choi1†
이 병민1
,
윤 제문2†
,
최 재학1†
1Department of Polymer Science and Engineering, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon 34134, Republic of Korea
2Division of Advanced Materials Engineering, Dong-Eui University, 178 Eomgwang-ro, Busanjin-gu, Busan 47340, Republic of Korea
1충남대학교 고분자공학과
2동의대학교 신소재공학부
†Corresponding author E-Mail : jaehakchoi@cnu.ac.kr (J.-H. Choi, Chungnam Nat’l Univ.) jmyun@deu.ac.kr (J. M. Yun, Dong-Eui Univ.)
May 2022. pp. 270-279
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Abstract

In this study, N/S co-doped carbon felt (N/S-CF) was prepared and characterized as an electrode material for electric double-layer capacitors (EDLCs). A commercial carbon felt (CF) was immersed in an aqueous solution of thiourea and then thermally treated at 800 °C under an inert atmosphere. The prepared N/S-CF showed a large specific surface area with hierarchical pore structures. The electrochemical performance of the N/S-CF-based electrode was evaluated using both 3- electrode and 2-electrode systems. In the 3-electrode system, the N/S-CF-based electrode showed a good specific capacitance of 177 F/g at 1 A/g and a good rate capability of 41% at 20 A/g. In the 2-electrode system (symmetric capacitor), the freestanding N/S-CF-based electrode showed a specific capacitance of 275 mF/cm2 at 2 mA/cm2, a rate capability of 62.5 % at 100 mA/cm2, a specific power density of ~ 25,000 mW/cm2 at an energy density of 23.9 mWh/cm2, and a cycling stability of ~ 100 % at 100 mA/cm2 after 20,000 cycles. These results indicate the N/S co-doped carbon felts can be a promising candidate as a new electrode material in a symmetric capacitor.

Keywords
carbon felt
thiourea
electric double-layer capacitor
electrode
doping
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Information
  • Publisher :Materials Research Society of Korea
  • Publisher(Ko) :한국재료학회
  • Journal Title :Korean Journal of Materials Research
  • Journal Title(Ko) :한국재료학회지
  • Volume : 32
  • No :5
  • Pages :270-279
  • Received Date : 2022-04-14
  • Revised Date : 2022-05-03
  • Accepted Date : 2022-05-16
  • DOI :https://doi.org/10.3740/MRSK.2022.32.5.270
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