Journal of the Korean Magnetic Resonance Society (한국자기공명학회논문지)

Korean Magnetic Resonance Society (한국자기공명학회)
권호 표지
DOI QR코드

DOI QR Code

Quantification of Methanol Concentration in the Polymer Electrolyte Membrane of Direct Methanol Fuel Cell by Solid-state NMR

  • Published : 2008.12.20
Download PDF
⟨ Previous Next ⟩

Abstract

Direct quantification of methanol in polymer electrolyte membrane (PEM) by solid-state nuclear magnetic resonance (NMR) spectroscopy was studied and the methanol concentrations in PEM produced by crossover and diffusion were compared. The error range of the quantification was not smaller than ${\pm}15%$ and the amount of the methanol crossed over in our direct methanol fuel cells (DMFCs) was less than the methanol diffused to PEM. The methanol concentration in the PEM of the DMFC operated at different current densities were equivalent.

Keywords

References

  1. S. Hikita, K. Yamane, and Y. Nakajima, JSAE Review 22, 151 (2001). https://doi.org/10.1016/S0389-4304(01)00086-8
  2. J. Han, and H. Liu, J. of Power Sources 164, 166 (2007). https://doi.org/10.1016/j.jpowsour.2006.09.105
  3. J. A. Drake, W. Wilson, and K. Killeen, J. Electrochem. Soc. 151, A413 (2004). https://doi.org/10.1149/1.1646150
  4. H. Dohle, J. Divisek, J. Mergel, H. F. Oetjen, C. Zingler, and D. Stolten, J. of Power Sources, 105, 274 (2002). https://doi.org/10.1016/S0378-7753(01)00953-3
  5. J. T. Wang, S. Wasmus, and R. F. Savinell, J. Electrochem. Soc. 143, 1233 (1996). https://doi.org/10.1149/1.1836622
  6. T. Schaffer, V. Hacker, T. Hejze, T. Tschinder, J. O. Besenhard, and P. Prenninger, J. of Power Sources 145, 188 (2005). https://doi.org/10.1016/j.jpowsour.2004.11.074
  7. B. Gurau, and E. S. Smotkin, J. of Power Sources 112, 339 (2002). https://doi.org/10.1016/S0378-7753(02)00445-7
  8. Y. Paik, S. S. Kim, and O. H. Han, Angw. Chem.. Int. Ed. 47, 94 (2008). https://doi.org/10.1002/anie.200703190