Characterization of PEM fuel cell degradation by polarization change curves

Bezmalinović, Dario; Šimić, Boris; Barbir, Frano

doi:10.1016/j.jpowsour.2015.06.047

Cited by 57 publications

(21 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…After only few hours the power decreases continuously. Degradations could be a result of an increase in resistance of the FC [23]. Figure 18 proves that aging FC consumes more Hydrogen than a new FC stacks; the more the FC is aged, the more the cost grows.…”

Section: Gain In Fc Rms Current and Gain In Fc Energy Lossesmentioning

confidence: 95%

Fuel Cell/ Super-capacitor power management system assessment and Lifetime Cost study in a 500kVA UPS

Amira¹,

Guermazi²

2018

Adv. sci. technol. eng. syst. j.

View full text Add to dashboard Cite

A 500 KVA Uninterruptible power supply (UPS) using Fuel Cells (FC) and supercapacitors (SCs) was studied with the worst case of 10 minutes and eight hours of interruption per day. A power management system was established to control the FC and the SCs in order to extract the hybridization benefits with a comparison between a Proton exchange membrane FC (PEMFC) working alone and another combined with SCs. Moreover, possible FC degradations were discussed. The start/stop cycling, the high-power loads and load changes degradations were taken into consideration in order to estimate the FC lifetime span using a prediction formula. Besides, the FC costs were studied to estimate the best average cost. Finally, the SCs filter constant time and their charging currents were revealed.

show abstract

Section: Gain In Fc Rms Current and Gain In Fc Energy Lossesmentioning

confidence: 95%

Fuel Cell/ Super-capacitor power management system assessment and Lifetime Cost study in a 500kVA UPS

Amira¹,

Guermazi²

2018

Adv. sci. technol. eng. syst. j.

View full text Add to dashboard Cite

show abstract

“…The equilibrium potential E 0 was calculated by the Nernst equation [ 32 ]. The anode and cathode were combined into a single effective electrode, and the electrochemical losses η act of a fuel cell were calculated by the Tafel equation [ 30 ] where α is the effective transfer coefficient with correction for the number of electrons transferred during the rate-determing step of the slowest reaction, and i 0 is the exchange current density, A/cm 2 . The voltage losses due to the oxygen transport limitations to the active sites of the cathode electrocatalyst were determined through the limiting current [ 31 ] by the equation where c is the constant characterizing the effect of oxygen transport limitations on the ORR thermodynamics and kinetics, V; and i L is the limiting current, A/cm 2 .…”

Section: Methodsmentioning

confidence: 99%

The Study of the Solid Polymer Electrolyte Oxygen Concentrator with Nanostructural Catalysts Based on Hydrophobized Support

et al. 2020

View full text Add to dashboard Cite

“…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%

“…Polarization change curve gives the linear relationship between current density and cell voltage, in which activation and resistive losses can be easily identified. The information obtained from the linear relationship allows the estimation of the electrochemically active surface area and instant prediction of electrocatalyst state of health [79]. The method however needs to be tested for reproducibility under different operating conditions and to be validated.…”

Section: Polarization Curvementioning

confidence: 99%

PEMFC for aeronautic applications: A review on the durability aspects

et al. 2017

View full text Add to dashboard Cite

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.

show abstract

Characterization of PEM fuel cell degradation by polarization change curves

Cited by 57 publications

References 15 publications

Fuel Cell/ Super-capacitor power management system assessment and Lifetime Cost study in a 500kVA UPS

Fuel Cell/ Super-capacitor power management system assessment and Lifetime Cost study in a 500kVA UPS

The Study of the Solid Polymer Electrolyte Oxygen Concentrator with Nanostructural Catalysts Based on Hydrophobized Support

PEMFC for aeronautic applications: A review on the durability aspects

Contact Info

Product

Resources

About