Equivalent Electric Circuit Modeling and Performance Analysis of a PEM Fuel Cell Stack Using Impedance Spectroscopy

Dhirde, A. M.; Dale, Nilesh; Salehfar, Hossein; Mann, M.D.; Han, Tae‐Hee

doi:10.1109/tec.2010.2049267

Cited by 166 publications

(67 citation statements)

References 27 publications

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“…While HFR was introduced earlier and can be justified through the existence of purely ohmic components, the other elements have to be further explained. Many authors, especially in FC research, use two RC-loops and refer to them as anode-and cathode-contributions [38]. This assumption may be supported by the development of a mechanistic model, which results in a similar EEC [39], but cannot overcome the problem of multiple fitting solutions.…”

Section: Model Supported Analysismentioning

confidence: 99%

Model-supported characterization of a PEM water electrolysis cell for the effect of compression

Frensch

Olesen

Araya

et al. 2018

Electrochimica Acta

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This paper investigates the influence of the cell compression of a PEM water electrolysis cell. A small single cell is therefore electrochemically analyzed by means of polarization behavior and impedance spectroscopy throughout a range of currents (0.01 A cm −2 to 2.0 A cm −2 ) at two temperatures (60• C and 80• C) and eight compressions (0.77 MPa to 3.45 MPa). Additionally, a computational model is utilized to support the analysis. The main findings are that cell compression has a positive effect on overall cell performance due to decreased contact resistances, but is subject to optimization. In this case, no signs of severe mass transport problems due to crushed transport layers are visible in either polarization curves or impedance plots, even at high currents. However, a Tafel plot analysis revealed more than one slope throughout the current range. The change in the Tafel slope is therefore discussed and connected to the electrochemical reaction or an ohmic contribution from a non-electrode component.

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Section: Model Supported Analysismentioning

confidence: 99%

Model-supported characterization of a PEM water electrolysis cell for the effect of compression

Frensch

Olesen

Araya

et al. 2018

Electrochimica Acta

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“…7. The oxygen reduction reaction in the cathode is very slow in comparison with the hydrogen oxidation reaction [19]. The anode over-voltage is smaller than that of the cathode.…”

Section: B Impedance Curve Analysis For a Pemfcmentioning

confidence: 94%

An Experimental Analysis of the Ripple Current Applied Variable Frequency Characteristic in a Polymer Electrolyte Membrane Fuel Cell

Kim¹,

Jang²,

Choe³

et al. 2011

Journal of Power Electronics

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Differences in the frequency characteristic applied to a ripple current may shorten fuel cell life span and worsen the fuel efficiency. Therefore, this paper presents an experimental analysis of the ripple current applied variable frequency characteristic in a polymer electrolyte membrane fuel cell (PEMFC). This paper provides the first attempt to examine the impact of ripple current through immediate measurements on a single cell test. After cycling for hours at three frequencies, each polarization and impedance curve is obtained and compared with those of a fuel cell. Through experimental results, it can be absolutely concluded that low frequency ripple current leads to long-term degradation of a fuel cell. Three different PEMFC failures such as membrane dehydration, flooding and carbon monoxide (CO) poisoning that lead to an increase in the impedance magnitude at low frequencies are simply introduced.

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“…The first parallel is related to activation polarization (i.e., charge transfer resistance) while the second models all losses that can be ascribed to concentration polarization and flooding issues (i.e., mass transfer resistance) [23][24][25]. Actually, the use of constant phase elements was preferred to pure capacitances in order to take into account the porous nature of double layers, thus their capacitive losses [26,27].…”

Section: Characterizationmentioning

confidence: 99%

Development and Characterization of Non-Conventional Micro-Porous Layers for PEM Fuel Cells

et al. 2015

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Gas diffusion medium (GDM) is a crucial component in proton exchange membrane fuel cells (PEMFCs). Being composed of a gas diffusion layer (GDL) with a micro-porous layer (MPL) coated onto it, it ensures a proper water management due to the highly hydrophobic materials employed in cell assembly. In current commercial applications, the desired water repellent behaviour is usually obtained by using polytetrafluoroethylene (PTFE). In this work, Fluorolink ® P56 (Solvay Specialty Polymers, Milan, Italy), a commercially available, anionic, segmented high molecular weight polyfluorourethane with perfluoropolyether groups was extensively evaluated as an alternative to PTFE for micro-porous layer hydrophobization. A change in polymer used is desirable in order to simplify the production process, both in terms of ink formulation and thermal treatment, as well as to get a higher hydrophobicity and, consequently, more efficient water management. Innovative prepared samples were compared to a PTFE-based GDM, in order to assess differences both from morphological and from an electrochemical point of view.

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Equivalent Electric Circuit Modeling and Performance Analysis of a PEM Fuel Cell Stack Using Impedance Spectroscopy

Cited by 166 publications

References 27 publications

Model-supported characterization of a PEM water electrolysis cell for the effect of compression

Model-supported characterization of a PEM water electrolysis cell for the effect of compression

An Experimental Analysis of the Ripple Current Applied Variable Frequency Characteristic in a Polymer Electrolyte Membrane Fuel Cell

Development and Characterization of Non-Conventional Micro-Porous Layers for PEM Fuel Cells

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