화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of the Korean Industrial and Engineering Chemistry, Vol.18, No.4, 381-385, August, 2007
Export Citation
초고용량 커패시터 전극활성물질용 고밀도 활성탄 제조 및 특성 연구
Study on High Density Activated Carbons for Electrode Materials of Supercapacitor
노광철, 박진배, 이철태1, 박철완2, †
  • 연세대학교 전기전자공학과
  • 1단국대학교 공학부 화학공학전공
  • 2전자부품연구원 차세대전지센터/경원대학교
Kwang Chul Roh, Jin Bae Park, Chul-Tae Lee1, and Chul Wan Park2, †
  • Department of Electric and Electronic Engineering, Yonsei University, Seoul 120-749, Korea
  • 1Department of Chemical Engineering, Dankook University, Seoul 140-714, Korea
  • 2Center for Advanced Batteries, Korea Electronics Technology Institute, Korea/Department of Bio-Nano, Kyungwon University, Gyeonggi-do 461-701, Korea
E-mail:
초록
본 논문은 코크스를 출발물질로 사용하여 KOH로 활성화시킴으로써 초고용량 커패시터의 전극활성물질인 고밀도 활성탄을 제조하였다. 활성화 시에 약품량을 줄이고 합성 조건을 제어함으로써 활성탄의 비표면적을 줄였다. 활성탄 비표면적은 500∼1260 m2/g을 나타내었고, 전극밀도는 0.68∼0.83 g/cm3로 측정되었다. 풀셀을 구성하여 용량 측정을 한 결과, 최고 20F/cc의 체적 당 용량 값(하프 셀 기준 95 F/cc 정도)을 보여 페놀레진 기반의 상용 활성탄에 비하여 상대적인 우위를 보였다.
High density activated carbons electrode materials, for supercapacitor were prepared by chemical KOH activation of cokes as the starting material under Ar atmosphere. By controlling the synthesis conditions and reducing KOH quantity in the activation step, the specific surface area of the product was decreased. BET surface area was measured to be 500∼1260 m2/g, and the electrode density was in the range of 0.68∼0.83 g/cm3. Volumetric specific capacitance (unit cell test) was as high as 20 F/cc, which corresponds to gravimetric specific capacitance of about 95 F/cc on the basis of half cell test. It should be noted that the specific capacitance of the activated carbons prepared in this study is superior to that of commercial activated carbons.
Keywords:high density activated carbon;supercapacitor;EDLC;capacitance
  1. Conway BE, J. Electrochem. Soc., 138, 1539 (1991)
  2. Conway BE, Electrochemical Supercapacitors, Plenum Publishing, New York (1999)
  3. U.S. Patent 3,634,736 (1972)
  4. Takehara J, Ohkubo N, Miyaoka K, Hukuda T, Electrochemical capacitors., Ⅱ, 190 (1996)
  5. Sasaki M, Araki S, No I, Proceedings of JSAE., No. 20015569 102-01 (2001)
  6. Sasaki M, Notsu I, Ara S, Proceedings of JSAE., No. 20005215 2-00 (2000)
  7. Stienecker AW, Stuart T, Ashtiani C, J. Power Sources, 156(2), 755 (2006)
  8. Tanahashi I, Yoshida A, Nishino A, J. Electrochem. Soc., 137, 3952 (1990)
  9. Tanahashi I, Yoshida A, Nishino A, Carbon, 28, 477 (1990)
  10. Cooper, www.bussmann.com.
  11. NESSCAP, www.nesscap.com.
  12. Zheng JP, Jow TR, J. Electrochem. Soc., 142(1), L6 (1995)
  13. Zheng JP, Cygan PJ, Jow TR, J. Electrochem. Soc., 142(8), 2699 (1995)
  14. Jow TR, Zheng JP, J. Electrochem. Soc., 145(1), 49 (1998)
  15. JEOL, www.jeol.co.jp.
  16. Power Systems, www.powersystems.co.jp.