Development of new test instruments and protocols for the diagnostic of fuel cell stacks

Wasterlain, Sébastien; Candusso, Denis; Harel, Fabien; Hissel, Daniel; François, Xavier

doi:10.1016/j.jpowsour.2010.08.029

Cited by 56 publications

(16 citation statements)

References 26 publications

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“…The positive slope appearing in the LSV voltammogram (Figure 9) above 0.4 V at the end of the aging run confirms the presence of an electrical short-circuit between the electrodes. This phenomenon has already been observed in previous studies [16,17] but unfortunately no physical explanation was given. It can be assumed that (i) a local thinning or a pinhole appearing in the membrane give birth to physical contacts between the electrodes and/or the GDLs or (ii) membrane creep triggers mechanical stresses between the membrane and the carbon fibers of the GDLs which can penetrate the membrane and enter in electrical contact with the other electrode and/or GDLs.…”

Section: Front Cellmentioning

confidence: 56%

Heterogeneous Aging Within PEMFC Stacks

Chatillon¹,

Bonnet²,

Lapicque³

2014

Fuel Cells

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International audienceEvaluation of PEM fuel cell aging occurring in various operating conditions is usually conducted in single cell configuration for which various electrochemical methods can be used. Aging phenomena in stack is often investigated either in a global manner or by basic measurements of variables, e. g. individual cell voltages. This paper presents the results of aging investigation of three-cell stacks using crossed linked electrochemical methods giving access to the time variations of ohmic and charge transfer resistance of the three cathodes, as well as the electrochemical surface area and the fuel crossover over more than 1,000 h at 0.3 A cm(-2) upon air humidification. Consistency between the various methods employed was discussed and demonstrated. In addition to the case of a stack formed by three sane cells, the case of a stack comprising a defective cell - previously aged under oxidative conditions - placed between two sane MEAs was investigated: the pre-ageing of this cell was shown to slightly accelerate the aging under long-term operation. Besides, it was observed that in both stacks, the back cell - i.e. located far from the stack inlet and outlet suffered much more from the long-term run than the two other cells

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Section: Front Cellmentioning

confidence: 56%

Heterogeneous Aging Within PEMFC Stacks

Chatillon¹,

Bonnet²,

Lapicque³

2014

Fuel Cells

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“…chemical, electrical, mechanical and thermal) making it difficult to single out causes of failure, performance loss or shortened lifetime. Despite the complexities, methods are developed to predict Fuel Cell State of Health (SoH) in terms of performance loss, degradation and, fault detection and isolation (FDI) [45,63,[74][75][76][77][78][79]. Diagnostic methods available are model or non-model based [71,[80][81][82][83][84].…”

Section: Pemfc Life Prediction Methods Under Aeronautic Conditionsmentioning

confidence: 99%

“…CV and LSV are auxiliary techniques that provide useful information on catalyst activity and membrane health (crossover) respectively. Main drawbacks of CV and LSV are that current cannot be drawn during measurements and the quality of data is affected by non-uniform cell voltage distribution within large stacks [77,87,88].…”

Section: Pemfc Life Prediction Methods Under Aeronautic Conditionsmentioning

confidence: 99%

PEMFC for aeronautic applications: A review on the durability aspects

et al. 2017

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Proton exchange membrane fuel cells (PEMFC) not only offer more efficient electrical energy conversion, relative to on-ground/backup turbines but generate by-products useful in aircraft such as heat for ice prevention, deoxygenated air for fire retardation and drinkable water for use on-board. Consequently, several projects (e.g. DLR-H2 Antares and RAPID2000) have successfully tested PEMFC-powered auxiliary unit (APU) for manned/unmanned aircraft. Despite the progress from flying PEMFC-powered small aircraft with 20 kW power output as high as 1 000 m at 100 km/h to 33 kW at 2 558 m, 176 km/h [1-3], durability and reliability remain key challenges. This review reports on the inadequate understanding of behaviour of PEMFC under aeronautic conditions and the lack of predictive methods conducive for aircraft that provide real-time information on the State of Health of PEMFCs. Highlights: The main research findings are -To minimize performance loss due to high altitude and inclination by adjusting cathode stoichiometric ratio. -To improve quality of oxygen-depleted air by controlling operating temperature and stoichiometric ratio. -Need to devise real time prediction methods conducive for determining PEMFC SoH in aircraft.

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“…In a paper by Wasterlain et al (2011) a new instrument developed in-lab is proposed to satisfy the requirements of electrochemical impedance studies to be led on large fuel cell plants made of numerous individual cells. Moreover, new voltammetry protocols dedicated to PEMFC stack analysis are described.…”

Section: Electrochemical Methodsmentioning

confidence: 99%

Experimental Methods for Investigating Fuel Cell Stacks

Bagotsky

2012

Fuel Cells

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Development of new test instruments and protocols for the diagnostic of fuel cell stacks

Cited by 56 publications

References 26 publications

Heterogeneous Aging Within PEMFC Stacks

Heterogeneous Aging Within PEMFC Stacks

PEMFC for aeronautic applications: A review on the durability aspects

Experimental Methods for Investigating Fuel Cell Stacks

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