Electrochemical Properties of Carbon Nano-Tube Electrode

탄소나노튜브 전극의 전기화학적 특성

  • Published : 2005.04.01


For application of carbon nano-tube (CNT) as a counter electrode materials of dye-sensitized solar cell (DSSC), the electrochemical behavior of CNT electrode was studied, employing cyclic-voltammetry (C-V) and impedance spectroscopy. Fabrication of CNT-paste and formation of CNT-counter electrode for characteristic measurement have been carried out using ball-milling and doctor blade process, respectively. Unit cell for measurements was assembled using Pt electrode, CNT electrode, and iodine-embedded electrolyte. Field emission-scanning electron microscopy (FE-SEM) was used for structural investigation of CNT powder and electrode. Sheet resistance of electrode was measured with 4-point probe method. Electrochemical properties of electrode, C-V and impedance spectrum, were studied, employing potentiogalvanostat (EG&G 273A) and lock in amplifier (EG&G 5210). As a results, the sheet resistance of CNT electrode is almost similar to that of F-doped SnO2 (FTO) coated glass substrate as approximately 10 ohm/sq. From C-V and impedance spectroscopy measurements, it was found that CNT electrode has high reaction rate and low interface reaction resistance between CNT surface and electrolyte. These results provides that CNT electrode were superior to that of conventional Pt electrode. Particularly, the reaction rate in the CNT electrode is about thrice high than Pt electrode. Therefore. CNT electrode is to be good candidate material for counter electrode in DSSC.



  1. P. Delaney, H.J. Choi, J. Ihn, S.G. Louie, and M.L. Cohen, Nature 391 (1998) 466 https://doi.org/10.1038/35099
  2. S.H. Jhi, J. Ihm, S.G. Louie, and M.L. Cohen, Nature 399 (1999) 132 https://doi.org/10.1038/20148
  3. S.J. Tans, R.M. Verschueren, and C. Dekker, Nature 393 (1998) 49 https://doi.org/10.1038/29954
  4. C. Liu, Y.Y. fan, M. Liu, H.T. Cong, H.M. Cheng, and M.S. Dresselhaus, Science 286 (1999) 1127 https://doi.org/10.1126/science.286.5442.1127
  5. J. Kong, N.R Franklin, C. Zhou, M.G. Chapline, S. Peng, K. Cho, and H. Dai, Science 287 (2000) 622 https://doi.org/10.1126/science.287.5453.622
  6. H.J. Sang, et al, Nature 412, 169 https://doi.org/10.1038/35084046
  7. 구보근, 이동윤, 김현주, 이원재, 송재성, '백금상대전극의 제조법에 다른 감료감응형 태양전지의 효율비교', 한국전기전자재료학회 2004년도 하계학술대회 논문집, Vol. 5, No. 1, pp 385-388, 2004
  8. 백운기, 박문수, '개정2판 전기화학', pp.59-202, 2003
  9. Macdonald, J.R, Impedance spectroscopy, Emphasizing Solid Materials and Systems, John Wiley & Sons, New York, pp. 20-25, 1987
  10. F.Scholz, Electroanalytical Methods, Springer-Verlag Berlin Heidelberg New York, pp 149-166, 2002