Browse > Article

The Preparation of Non-aqueous Supercapacitors with LiMn2O4/C Composite Positive Electrodes  

Kim, Kyoungho (School of Chemical Engineering and Materials Science, Chung-Ang University)
Yoo, Jeeyoung (School of Chemical Engineering and Materials Science, Chung-Ang University)
Kim, Minsoo (School of Chemical Engineering and Materials Science, Chung-Ang University)
Yeu, Taewhan (School of Chemical Engineering and Materials Science, Chung-Ang University)
Publication Information
Korean Chemical Engineering Research / v.45, no.2, 2007 , pp. 178-182 More about this Journal
Abstract
Non-aqueous supercapacitors by using activated C and $LiMn_2O_4$ as an active material in a positive electrode were prepared and characterized. From the cyclic voltammetry and AC impedance analysis, the capacitive effect by electric double layer of activated carbon and the faradic effect by intercalation/deintercalation of $Li^+$ ion were observed. Increasing the ratio of $LiMn_2O_4$, specific capacitances and energy densities of supercapacitor were increased. At the ratio of 0.86:0.14 ($LiMn_2O_4:C$), the maximum specific capacitance of 17.51 Wh/L and energy density of 23.83 F/cc were obtained, which were more than twice of those for a conventional electric double layer capacitor. Even after 1,000 charge/discharge cycle, the supercapacitor by using the electrode containing 14% of activated carbon and 86% of $LiMn_2O_4$ showed 60% better specific capacitance and energy density than that by using the electrode containing 100% activated carbon.
Keywords
Supercapacitor; Non-aqueous; Composit Electrode; Lithium Manganese Oxide; Activated Carbon; High Energy Density; High Specific Capacitance;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Conway, B. E., Electrochemical Supercapacitors, Scientific Fundamentals and Technological Applications, Kluwer Academic Publishers/Plenum Publishers, New York(1999)
2 Miller, J. M., Dunn, B., Tran, T. D. and Pekala, R. W., J. Electrochem. Soc., 144, L309(1997)   DOI   ScienceOn
3 Kim, K. M., Hur, J. W., Jung, S. I. and Kang, A. S., Electrochim. Acta., 50, 863(2004)   DOI   ScienceOn
4 Wang, Y. G. and Xia, Y. Y., J. Electrochem. Soc., 153, A450 (2006)   DOI   ScienceOn
5 Jow, T. R. and Zheng, J. P., J. Electrochem. Soc., 145, 49(1998)   DOI   ScienceOn
6 Michio Okamura and Makoto Takeuchi, US patent, US 20020012223 (2002)
7 Michael, M. S. and Parbaharn, S. R. S., J. Power Sources., 136, 250(2004)   DOI   ScienceOn
8 Amatucci, G. G., Badway, F., Pasquier, A. D. and Zheng, T., J. Electrochem. Soc., 148, A930(2001)   DOI   ScienceOn
9 Srinivasan, V. and Weidner, J. W., J. Electrochem. Soc., 144, L210 (1997)   DOI   ScienceOn
10 Ramani, M., Haran, B. S., White, R. E. and Popov, B. N., J. Electrochem. Soc., 148, A374(2001)   DOI   ScienceOn
11 Liu, K. and Anderson, M. A., J. Electrochem. Soc., 143, 124 (1996)   DOI
12 Sato, Y., Yomogida, K., Nanaumi, T., Kobayakawa, K., Ohsawa, Y. and Kawai, M., Electrochem. Solid State Lett., 3, 113(2000)   DOI   ScienceOn
13 Taberna, P. L., Simon, P. and Fauvarque, J. F., J. Electrochem. Soc., 150, A292(2003)   DOI   ScienceOn
14 Frackowiak, E. and Beguin, F., Carbon, 39, 937(2001)   DOI   ScienceOn
15 Tukamoto, H. and West, A. R., J. Electrochem. Soc., 144, 3164 (1997)   DOI   ScienceOn
16 Pasquier, A. D., Du Pasquier, A., Plitz, I., Gural, J., Badway, F. and Amatucci, G. G., J. Power Sources, 136, 161(2004)