Three dimensional stress analysis of solid oxide fuel cell anode micro structure

Basit Öğe Kaydı
dc.authorid0000-0002-7306-9784
dc.authorid0000-0001-6395-4424
dc.contributor.authorCelik, Selahattin
dc.contributor.authorIbrahimoglu, Beycan
dc.contributor.authorToros, Serkan
dc.contributor.authorMat, Mahmut D.
dc.date.accessioned2019-08-01T13:38:39Z
dc.date.available2019-08-01T13:38:39Z
dc.date.issued2014
dc.departmentNiğde ÖHÜ
dc.description.abstractOne of the most common problems in solid oxide fuel cells (SOFCs) is the delamination and thus the degradation of electrode/electrolyte interface which occurs in the consequences of the stresses generated within the different layers of the cell. Nowadays, the modeling of this problem under certain conditions is one of the main issues for the researchers. The structural and thermo-physical properties of the cell materials (i.e. porosity, density, Young's modulus etc.) are usually assumed to be homogenous in the mathematical modeling of solid oxide fuel cells at macro-scale. However, during the real operation, the stresses created in the multiphase porous layers might be very different than those at macro-scale. Therefore, micro-level modeling is required for an accurate estimation of the real stresses and the performance of SOFCs. This study presents a microstructural characterization and a finite element analysis of the delamination and the degradation of porous solid oxide fuel cell anode and electrode/electrolyte interface under various operating temperatures, compressing forces and material compositions by using the synthetically generated microstructures. A multi physics computational package (COMSOL) is employed to calculate the Von Misses stresses in the anode microstructures. The maximum thermal stress in the electrode/electrolyte interface and three phase boundaries is found to exceed the yield strength at 900 degrees C while 800 degrees C is estimated as a critical temperature for the delamination and micro cracks due to thermal stress generated. The thermal stress decreases in the grain boundaries with increasing content of one of the phases (either Ni or YSZ) and the porosity of the electrode. A clamping load higher than 5 kg cm(-2) is also found to exceed the shear stress limit. Copyright (C) 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
dc.identifier.doi10.1016/j.ijhydene.2014.09.110
dc.identifier.endpage19131
dc.identifier.issn0360-3199
dc.identifier.issn1879-3487
dc.identifier.issue33
dc.identifier.scopus2-s2.0-84908243601
dc.identifier.scopusqualityQ1
dc.identifier.startpage19119
dc.identifier.urihttps://dx.doi.org/10.1016/j.ijhydene.2014.09.110
dc.identifier.urihttps://hdl.handle.net/11480/4101
dc.identifier.volume39
dc.identifier.wosWOS:000345803900041
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.institutionauthor[0-Belirlenecek]
dc.language.isoen
dc.publisherPERGAMON-ELSEVIER SCIENCE LTD
dc.relation.ispartofINTERNATIONAL JOURNAL OF HYDROGEN ENERGY
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectSolid oxide fuel cell
dc.subjectMicro level modeling
dc.subjectStress analysis
dc.subjectAnode
dc.titleThree dimensional stress analysis of solid oxide fuel cell anode micro structure
dc.typeArticle

Dosyalar

Koleksiyon

WoS İndeksli Yayınlar Koleksiyonu
Scopus İndeksli Yayınlar Koleksiyonu