Studies on Charge/Discharge Behaviors according to Electrochemical Activation of Green Cokes Type Mesocarbon Microbeads

그린 코크스 상 메조카본 마이크로비즈의 전기화학 부활에 따른 충방전 특성 연구

  • Roh, Kwang Chul (Department of Electric and Electronic Engineering, Yonsei University) ;
  • Park, Jin Bae (Department of Electric and Electronic Engineering, Yonsei University) ;
  • Park, Chul Wan (Center for Advanced Batteries, Korea Electronics Technology Institute/Department of Bio-Nano, Kyungwon University)
  • 노광철 (연세대학교 전기전자공학과) ;
  • 박진배 (연세대학교 전기전자공학과) ;
  • 박철완 (전자부품연구원 차세대전지 연구센터/경원대학교 바이오나노학과)
  • Received : 2007.08.03
  • Accepted : 2007.09.14
  • Published : 2007.12.10

Abstract

23 F/cc grade new type of high density activated carbon from crystalline green cokes type of mesocarbon microbeads has been synthesized by chemical and electrochemical activation. In order for these materials to have high performance, electrochemical behavior during electrochemical activation has been investigated by sequential voltage applying schemes. These results showed that the effective voltage for electrochemical activation was about 2.7~3.2 V irrelevant to applying voltage due to the decrease of surface activation of activated carbon with high specific surface area.

References

  1. B. E. Conway, J. Electrochem. Soc., 138, 1539 (1991) https://doi.org/10.1149/1.2085829
  2. B. E. Conway, Electrochemical Supercapacitors, Plenum Publishing, New York (1999)
  3. M. Endo, T. Maeda, T. Takeda, Y. J. Kim, K. Koshiba, H. Hara, and M. S. Dresselhaus, J. Electrochem. Soc., 148, A910 (2001) https://doi.org/10.1149/1.1382589
  4. JEOL, www.jeol.co.jp
  5. Power Systems, www.powersystems.co.jp
  6. U. S. Patent 6,738,252 (2004)
  7. T. Aida, I. Murayama, K. Yamada, and M. Morita, J. Power Sources, 166, 462 (2007) https://doi.org/10.1016/j.jpowsour.2007.01.037
  8. NESSCAP, www.nesscap.com
  9. M. Takeuchi, T. Maruyama, K. Koike, A. Mogami, T. Oyama, and H. Kobayashi, Electrochemistry, 69, 487 (2001)
  10. A. Mogami, Nikkei Electron., 6, 131 (2004)
  11. S. Nomoto, H. Nakata, K. Yoshioka, A. Yoshida, and H. Yoneda, J. Power Sources, 97, 807 (2001) https://doi.org/10.1016/S0378-7753(01)00612-7
  12. T. Morimoto, K. Hiratsuka, Y. Sanada, and K. Kurihara, J. Power Sources, 60, 239 (1996)