Proton exchange membrane fuel cell degradation: A parametric analysis using Computational Fluid Dynamics

Date

2016-02-01

Author

ÖZDEN, Ender
Tarı, İlker

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

78
views

0
downloads

A Polymer Electrolyte Membrane (PEM) fuel cell is numerically investigated both as fresh and as degraded with the help of observed degradation patterns reported in the literature. The fresh fuel cell model is validated and verified with the data from the literature. Modifying the model by varying the parameters affected by degradation, a degraded PEM fuel cell model is created. The degraded fuel cell is parametrically analyzed by using a commercial Computational Fluid Dynamics (CFD) software. The investigated parameters are the membrane equivalent weight, the Catalyst Layer (CL) porosity and viscous resistance, the Gas Diffusion Layer (GDL) porosity and viscous resistance, and the bipolar plate contact resistance. It is shown for the first time that PEM fuel cell overall degradation can be numerically estimated by combining experimental data from degraded individual components. By comparing the simulation results for the fresh and the degraded PEM fuel cells for two years of operation, it is concluded that the effects of overall degradation on cell potential is significant - estimated to be 17% around the operating point of the fuel cell at 0.95 V open circuit voltage and 70 degrees C operating temperature.

Subject Keywords

PEM fuel cell degradation, Computational Fluid Dynamics, Parametric analysis

URI

https://hdl.handle.net/11511/47446

Journal

JOURNAL OF POWER SOURCES

DOI

https://doi.org/10.1016/j.jpowsour.2015.11.042

Collections

Department of Mechanical Engineering, Article

Suggestions

OpenMETU
Core

Nafion/titanium silicon oxide nanocomposite membranes for PEM fuel cells DEVRİM, YILSER; Erkan, Serdar; BAÇ, NURCAN; Eroğlu, İnci (2013-04-01) In the present study, Nafion/Titanium Silicon Oxide (TiSiO4) nanocomposite membranes were prepared by recasting method for proton exchange membrane fuel cells. The composite membrane containing 10wt% TiSiO4 had a membrane thickness of 80 mu m. The membrane was characterized by thermogravimetric analysis, X-ray diffraction (XRD), and scanning electron microscopy (SEM). SEM and XRD results have proven the uniform and homogeneous distribution of TiSiO4 in Nafion, and consequently, the crystalline character of ...
Preparation and characterization of sulfonated polysulfone/titanium dioxide composite membranes for proton exchange membrane fuel cells Devrim, Yiser; Erkan, Serdar; BAÇ, NURCAN; Eroğlu, İnci (2009-05-01) In the present study, sulfonated polysulfone (sPS)/titanium dioxide (TiO2) composite membranes for use in proton exchange membrane fuel cells (PEMFCs) were investigated. Polysulfone (PS) was sulfonated with trimethylsilyl chlorosulfonate in 1,2 dichloroethane at ambient temperatures. It was shown that the degree of sulfonation is increased with the molar ratio of the sulfonating agent to PS repeat unit. The degree of sulfonation was determined by elemental analysis and H-1 NMR was performed to verify the su...
Facilitation of water management in low Pt loaded PEM fuel cell by creating hydrophobic microporous layer with PTFE, FEP and PDMS polymers: Effect of polymer and carbon amounts ÖZTÜRK, Ayşenur; FIÇICILAR, BERKER; Eroğlu, İnci; BAYRAKÇEKEN YURTCAN, Ayşe (2017-08-17) Microporous layers (MPLs) were prepared with different hydrophobic polymers to establish water management in polymer electrolyte membrane (PEM) fuel cells. Besides conventionally used polymers polytetrafluoroethylene (PTFE) and fluorinated ethylene propylene (FEP), two different molecular weights (MW) of polydimethylsiloxane (PDMS) polymer were used as hydrophobic materials in MPL. Membrane electrode assemblies (MEAs) having MPLs with low MW PDMS polymer exhibited the best fuel cell performance compared to ...
Polybenzimidazole/SiO2 hybrid membranes for high temperature proton exchange membrane fuel cells DEVRİM, YILSER; Devrim, Huseyin; Eroğlu, İnci (2016-06-22) Polybenzimidazole/Silicon dioxide (PBI/SiO2) hybrid membranes were prepared and characterized as alternative materials for high temperature proton exchange membrane fuel cell (HT-PEMFC). The PBI/SiO2 membranes were cast from a PBI polymer synthesized in the laboratory and contained 5 wt. % SiO2 as inorganic filler. Scanning electron microscopy (SEM) analysis showed that the uniform and homogeneous distribution of SiO2 particles in the hybrid membrane. The existence SiO2 has improved the acid retention and p...
Electrocatalyst development and modeling of nonisothermal two-phase flow for PEM fuel cells Fıçıcılar, Berker; Eroğlu, İnci; Department of Chemical Engineering (2011) A macro-homogeneous, nonisothermal, two-phase, and steady state mathematical model is developed to investigate water and thermal management in polymer electrolyte membrane (PEM) fuel cells. An original two-phase energy balance approach is used to catch the thermal transport phenomena in cases when there is a signi cant temperature di erence between the fuel cell temperature and the reactants inlet temperatures like during cold start-up. Model considers in depth electrode kinetics for both anode and cathode ...

Citation Formats

E. ÖZDEN and İ. Tarı, “Proton exchange membrane fuel cell degradation: A parametric analysis using Computational Fluid Dynamics,” JOURNAL OF POWER SOURCES, pp. 64–73, 2016, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/47446.