Quantification of Methanol Concentration in the Polymer Electrolyte Membrane of Direct Methanol Fuel Cell by Solid-state NMR
2
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
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 ± 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.
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 ± 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.
참고문헌 (8)
- S. Hikita, , JSAE Review, 22, pp.151~ (2001)
- J. Han, , J. of Power Sources, 164, pp.166~ (2007)
- J. A. Drake, , J. Electrochem. Soc, 151, pp.A413~ (2004)
- H. Dohle, , J. of Power Sources, 105, pp.274~ (2002)
- J. T. Wang, , J. Electrochem. Soc, 143, pp.1233~ (1996)
- T. Schaffer, , J. of Power Sources, 145, pp.188~ (2005)
- B. Gurau, , J. of Power Sources, 112, pp.339~ (2002)
- Y. Paik, , Angw. Chem.. Int. Ed, 47, pp.94~ (2008)