Characterisation and Modelling of a High Temperature PEM Fuel Cell Stack using Electrochemical Impedance Spectroscopy

Andreasen, Søren Juhl; Jespersen, Jesper; Schaltz, Erik; Kær, Søren Knudsen

doi:10.1002/fuce.200990011

Cited by 7 publications

(10 citation statements)

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“…R Ohm is the resistance of protons and electrons conduction . Besides, this resistance is used to summarize the resistances between wires and MEA contact interfaces . In Figure , R Ohm is the intersection of the impedance with the real axis at high frequencies.…”

Section: Resultsmentioning

confidence: 99%

“…The exponents have been kept constant to improve the fit and to avoid randomly resistance trends . Therefore, the pseudocapacitive elements at high and intermediate frequencies account to electrode surface roughness or distribution/accumulation of charge carriers as reported above, whereas the element at low frequencies account to pure charge carriers storage in the porous structure of the GDL and electrodes because of free electrons available from the electrochemical reactions …”

Section: Resultsmentioning

confidence: 99%

“…R hf is represented by the diameter of the arc at high frequencies. The high frequency arc is recognized as potential independent but authors attributed the arc to resistance effects in the electrolyte within the catalyst layer and/or to anode charge transfer resistance (hydrogen oxidation reaction, HOR, activation losses) . R if is the diameter of the arc at intermediate frequencies and it is the cathode charge transfer resistance (ORR activation losses) .…”

Section: Resultsmentioning

confidence: 99%

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Long‐term testing of a high temperature polymer electrolyte membrane fuel cell: The effect of reactant gases

2015

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The investigations have been conducted with different oxidants and fuels with the aim of determining the state-of-the-art of commercially available high temperature polymer electrolyte fuel cells based on polybenzimidazole for its application in combined heat and power generation systems. The fuel cell test performed with synthetic reformate (263 lV/h) showed an increase of anode charge and mass transfer resistances. This behavior has suggested that CO may be generated from the CO 2 included in the synthetic reformate via reverse water gas shift reaction. The fuel cell test performed with pure O 2 developed the highest degradation rates (270 lV/h) due to fast oxidative degradation of membrane electrode assembly materials such as cathode catalyst and membrane. Fuel cell operation with H 2 /air exhibited the lowest degradation rates (257 lV/h) and it requires longer investigating times to identify the different degradation mechanisms. Moreover, fuel cell tests performed with air suggested longer break-in procedures to complete catalyst activation and redistribution of electrolyte.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Long‐term testing of a high temperature polymer electrolyte membrane fuel cell: The effect of reactant gases

2015

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“…Using the test rig Electrochemical Impedance Spectroscopy (EIS) measurements are periodically conducted. The Labview program will according to the user input conduct impedance measurements, the same program has previously been used for fuel cell measurements [9]. In this work the hardware was however changed to the CompactDAQ platform previously described, the Labview program remained unchanged.…”

Section: Labview-based Eismentioning

confidence: 99%

Capacity Measurements of Li-Ion Batteries using AC Impedance Spectroscopy

Jespersen

Tønnesen

Nørregaard

et al. 2009

WEVJ

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This work presents AC impedance measurements (EIS) on a Li-Tec 40 Ah Li-Ion battery cell, including measurements in a climate chamber at different temperatures. The objective of this work is to provide a preliminary basis for estimating the potential of using EIS as a diagnostic tool for battery capacity measurements. In order to estimate the feasibility a Li-Ion battery cell is characterized by several EIS measurement, including measurements in a controlled temperature environment. From the measurements it can be seen that the impedance spectrum indeed changes as a function of State-of-Charge (SOC). However, measurements also show that the same spectrum is also strongly temperature dependent. Is is however concluded that EIS can potentially be used as a capacity diagnostic tool if a non-isothermal battery model based on EIS input data can be developed. The climate chamber measurements also features temperature data of the battery temperature compared to surrounding temperature, this data shows that a battery voltage drop will invoke a battery temperature increase. As the impedance measurements presented in this work are carried out on flexible low-cost Labview platform using conventional data acquisition equipment, suggestions have been presented on how EIS, as a diagnostic tool, preferably can be embedded in the battery management system.

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“…The critical working temperature of fuel cells and the type of electrolyte plays the critical parameters to select suitable fuel cells. Because of the characteristics and performance of the fuel cells depend on the operating temperature [48]- [49]. Fig.…”

Section: Introductionmentioning

confidence: 99%

Survey of DC-DC Non-Isolated Topologies for Unidirectional Power Flow in Fuel Cell Vehicles

et al. 2020

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The automobile companies are focusing on recent technologies such as growing Hydrogen (H2) and Fuel Cell (FC) Vehicular Power Train (VPT) to improve the Tank-To-Wheel (TTW) efficiency. Benefits, the lower cost, 'Eco' friendly, zero-emission and high-power capacity, etc. In the power train of fuel cell vehicles, the DC-DC power converters play a vital role to boost the fuel cell stack voltage. Hence, satisfy the demand of the motor and transmission in the vehicles. Several DC-DC converter topologies have proposed for various vehicular applications like fuel cell, battery, and renewable energy fed hybrid vehicles etc. Most cases, the DC-DC power converters are viable and cost-effective solutions for FC-VPT with reduced size and increased efficiency. This article describes the state-of-the-art in unidirectional nonisolated DC-DC Multistage Power Converter (MPC) topologies for FC-VPT application. The paper presented the comprehensive review, comparison of different topologies and stated the suitability for different vehicular applications. This article also discusses the DC-DC MPC applications more specific to the power train of a small vehicle to large vehicles (bus, trucks etc.). Further, the advantages and disadvantages pointed out with the prominent features for converters. Finally, the classification of the DC-DC converters, its challenges, and applications for FC technology is presented in the review article as stateof-the-art in research.

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Characterisation and Modelling of a High Temperature PEM Fuel Cell Stack using Electrochemical Impedance Spectroscopy

Cited by 7 publications

References 0 publications

Long‐term testing of a high temperature polymer electrolyte membrane fuel cell: The effect of reactant gases

Long‐term testing of a high temperature polymer electrolyte membrane fuel cell: The effect of reactant gases

Capacity Measurements of Li-Ion Batteries using AC Impedance Spectroscopy

Survey of DC-DC Non-Isolated Topologies for Unidirectional Power Flow in Fuel Cell Vehicles

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