유기계 슈퍼커패시터에서 도전재의 양이 전기화학적 특성에 미치는 영향 = Effect of Conductive Additive Amount on Electrochemical Performances of Organic Supercapacitors

다국어 초록 (Multilingual Abstract)

In this study, we intensively investigated the effect of conductive additive amount on electrochemical performance of organic supercapacitors. For this purpose, we assembled coin-type organic supercapacitor cells with a variation of conductive additive(carbon black) amount; carbon aerogel and polyvinylidene fluoride were employed as active material and binder, respectively. Carbon aerogel, which is a highly mesoporous and ultralight material, was prepared via pyrolysis of resorcinol-formaldehyde gels synthesized from polycondensation of two starting materials using sodium carbonate as the base catalyst. Successful formation of carbon aerogel was well confirmed by Fourier-transform infrared spectroscopy and $N_2$ adsorption-desorption analysis. Electrochemical performances of the assembled organic supercapacitor cells were evaluated by cyclic voltammetry, galvanostatic charge/discharge, and electrochemical impedance spectroscopy measurements. Amount of conductive additive was found to strongly affect the charge transfer resistance of the supercapacitor electrodes, leading to a different optimal amount of conductive additive in organic supercapacitor electrodes depending on the applied charge-discharge rate. A high-rate charge-discharge process required a relatively high amount of conductive additive. Through this work, we came to conclude that determining the optimal amount of conductive additive in developing an efficient organic supercapacitor should include a significant consideration of supercapacitor end use, especially the rate employed for the charge-discharge process.

참고문헌 (Reference)

1 D. Qu, 74 : 99-, 1998

2 C. Lei, 92 : 183-, 2013

3 S. L. Candelaria, 5 : 5619-, 2012

4 R. Burt, 16 : 6519-, 2014

5 T. Sato, 295 : 108-, 2015

6 H. Yang, 324 : 309-, 2016

7 H. Nishihara, 24 : 4473-, 2012

8 E. Frackowiak, 22 : 226-, 2013

9 G. Wang, 41 : 797-, 2012

10 M. Inagaki, 195 : 7880-, 2010

11 A. G. Pandolfo, 157 : 11-, 2006

12 Z. Yu, 8 : 702-, 2015

13 E. Frackowiak, 19 : 937-, 2001

14 P. Thounthong, 196 : 313-, 2011

15 K. H. An, 13 : 497-, 2001

16 L. L. Zhang, 20 : 5983-, 2010

17 L. Wei, 1 : 552-, 2012

18 J. Biener, 4 : 656-, 2011

19 S. J. Kim, 40 : 725-, 2005

20 J. Li, 158 : 784-, 2006

21 M. Kim, 282 : 277-, 2015

22 D. L. Castelló, 41 : 1765-, 2003

23 L. Mao, 22 : 1845-, 2012

24 J. Kuhn, 225 : 58-, 1998

25 D. Wu, 351 : 915-, 2005

26 H. D. Yoo, 267 : 211-, 2014

27 C. Portet, 49 : 905-, 2004

28 Adinaveen Thambidurai, "Preparation and electrochemical behaviour of biomass based porous carbons as electrodes for supercapacitors - a comparative investigation" 한국화학공학회 31 (31): 268-275, 2014