Symmetrical electrode mode for PEMFC characterisation using impedance spectroscopy

Hombrados, A.G.; González, Lucy T.; Rubio, Miguel A.; Agila, W.; Villanueva, Eliseo P.; Guinea, Domingo; Chinarro, E.; Moreno, B.; Jurado, J. R.

doi:10.1016/j.jpowsour.2005.02.081

Cited by 41 publications

(29 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The equivalent circuit in Figure 11, without the distributed diffusion element (Z W , the dashed-line enclosed element), is associated with cases of low cell currents or dry cathode feeds at high currents, where no significant cathode flooding occurs. L is the pseudo-inductance at high frequency, associated with the current collector plates or metallic components such as conducting wires [45,46]. The pseudo-inductances obtained in Table 1 were close to the values reported by Lai et al [46].…”

Section: Eis Equivalent Circuit Parameterssupporting

confidence: 81%

Effects of Humidification on the Membrane Electrode Assembly of Proton Exchange Membrane Fuel Cells at Relatively High Cell Temperatures

Yin

Chang

2011

Fuel Cells

View full text Add to dashboard Cite

This study focuses on the performances of proton exchange membrane fuel cells (PEMFCs) at 80 and 90 °C with feeds of varying degrees of humidification. The results show that ohmic resistance of the solid electrolyte decreases as the current density is raised because of the back diffusion of liquid water, that is, generated in the cathode active layer. On the other hand, severe liquid water accumulation occurs at high current densities, which hinders the oxygen transport in the cathode gas diffusion layer (GDL) resulting in the Nernst diffusion limitation. The polarization measurement correlates well with the electrochemical impedance spectroscopy (EIS) analysis. The effects of humidification on membrane hydration, activity in the catalyst layer, and oxygen diffusion over‐potential in the cathode GDL are elucidated with the proposed equivalent circuit model at varying operating current densities.

show abstract

Section: Eis Equivalent Circuit Parameterssupporting

confidence: 81%

Effects of Humidification on the Membrane Electrode Assembly of Proton Exchange Membrane Fuel Cells at Relatively High Cell Temperatures

Yin

Chang

2011

Fuel Cells

View full text Add to dashboard Cite

show abstract

“…9 Impedance was measured directly in the frequency domain by applying a single-frequency voltage to the cell and recording the real and the imaginary parts of the resulting current at that frequency. An impedance analyzer (HP 4192 A LF) was used to measure complex impedance data.…”

Section: Polarization Curve Test and Symmetrical Electrode Mode Eis Amentioning

confidence: 99%

Polymeric proton conducting systems based on commercial polymers: Crossover analysis and single cell testing

Escribano¹,

Y²,

Acosta³

2010

J of Applied Polymer Sci

View full text Add to dashboard Cite

Continuing with the work published previously (Escribano et al., J Appl Polym Sci 2004, 93, 2394 Escribano et al., J Appl Polym Sci 2006, 102, 13) this article shows the final part of the characterization of the films object of our study, containing hydrogenated poly(butadiene-styrene) block copolymer, ethylene-propylene terpolymer, and a third component, polypropylene, polystyrene or silica, crosslinked with peroxides and heterogeneously sulfonated. Water uptake and methanol crossover were determined, and the results were compared with those of Nafion prepared by casting. A complete Membrane electrode Assembly was tested in a single cell obtaining the polarization and power curves at different temperatures and pressures, and modeling it by an electrical equivalent circuit in the symmetrical mode configuration using the electrochemical impedance spectroscopy technique. This study offers a physical interpretation relating physical parameters to several processes occurring in the system. Methanol crossover is lower than in Nafion, and power density values are in some cases higher than in Nafion.

show abstract

“…As a consequence, the anode over-voltage contribution to the cell voltage can be neglected in the model. (2) The double layer capacity, which is usually represented by constant-phase elements, is represented by a pure, singlefrequency theoretical capacity [19,16,22,29].…”

Section: Equivalent Circuit For a Pemfcmentioning

confidence: 99%

“…In this context, EIS techniques are employed to study the fuel cell behavior, and to estimate the value of the cell model parameters [17][18][19][20]. However, EIS equipment is too expensive and bulky for use on in-field assessment of operating commercial cells.…”

Section: Introductionmentioning

confidence: 99%

Diagnosis of PEM fuel cells through current interruption

Rubio

Urquía

Dormido

2007

Journal of Power Sources

Self Cite

View full text Add to dashboard Cite

Symmetrical electrode mode for PEMFC characterisation using impedance spectroscopy

Cited by 41 publications

References 14 publications

Effects of Humidification on the Membrane Electrode Assembly of Proton Exchange Membrane Fuel Cells at Relatively High Cell Temperatures

Effects of Humidification on the Membrane Electrode Assembly of Proton Exchange Membrane Fuel Cells at Relatively High Cell Temperatures

Polymeric proton conducting systems based on commercial polymers: Crossover analysis and single cell testing

Diagnosis of PEM fuel cells through current interruption

Contact Info

Product

Resources

About