한국재료학회지 (Korean Journal of Materials Research)

  • 제32권5호
  • /
  • Pages.270-279
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  • 2022
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  • 1225-0562(pISSN)
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  • 2287-7258(eISSN)
한국재료학회 (Materials Research Society of Korea)
권호 표지
DOI QR코드

DOI QR Code

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

Fabrication and Electrochemical Characterization of N/S co-doped Carbon Felts for Electric Double-Layer Capacitors

  • 이병민 (충남대학교 고분자공학과) ;
  • 윤제문 (동의대학교 신소재공학부) ;
  • 최재학 (충남대학교 고분자공학과)
  • Lee, Byoung-Min (Department of Polymer Science and Engineering, Chungnam National University) ;
  • Yun, Je Moon (Division of Advanced Materials Engineering, Dong-Eui University) ;
  • Choi, Jae-Hak (Department of Polymer Science and Engineering, Chungnam National University)
  • 투고 : 2022.04.14
  • 심사 : 2022.05.16
  • 발행 : 2022.05.27
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초록

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 ℃ 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.

키워드

과제정보

This work was supported by the research fund of Chungnam National University.

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