{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/108637"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/108637","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Electrochemomechanics in Mixed Ionic Electronic Conductors and solid oxide cells","abstract":"This thesis presents a model for coupled electrochemomechanics in Mixed Ionic Electronic Conductors (MIEC). A continuum model is formulated to simulate the transport of ionic defects and the stress distribution in the conductor arising from the chemical expansion associated with the defects. First, a finite element formulation of the model is developed and validated with various analytical solutions and comparisons with experimental results. In the third chapter the coupled model is used along with an iterative scheme to simulate the transport characteristics in solid oxide cells with oxygen surface exchange and results are compared with experimental cell operation. The model is used to study the effect of oxygen surface exchange and the bulk diffusion of defects on the performance of solid oxide cell. In the fourth chapter, the transport of ionic defects is studied under spatially varying oxygen surface exchange in solid oxide cells due to the presence of metal current collector. Various defect transport mechanisms (boundary value problem setups) are proposed and studied to identify and explain the influence of metal current collector on oxygen exchange at the electrode film surface.","abstract_html":"This thesis presents a model for coupled electrochemomechanics in Mixed Ionic Electronic Conductors (MIEC). A continuum model is formulated to simulate the transport of ionic defects and the stress distribution in the conductor arising from the chemical expansion associated with the defects. First, a finite element formulation of the model is developed and validated with various analytical solutions and comparisons with experimental results. In the third chapter the coupled model is used along with an iterative scheme to simulate the transport characteristics in solid oxide cells with oxygen surface exchange and results are compared with experimental cell operation. The model is used to study the effect of oxygen surface exchange and the bulk diffusion of defects on the performance of solid oxide cell. In the fourth chapter, the transport of ionic defects is studied under spatially varying oxygen surface exchange in solid oxide cells due to the presence of metal current collector. Various defect transport mechanisms (boundary value problem setups) are proposed and studied to identify and explain the influence of metal current collector on oxygen exchange at the electrode film surface.","abstract_has_math":false,"creators":["Mahendran, Rupesh Kumar"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"M.S.","degree_level":"Thesis","degree_discipline":"Mechanical Engineering","degree_department":null,"school":null,"contributors":["Sofronis, Petros","Perry, Nicola H","Dadfarnia, Mohsen"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2020,"date_issued":"2020-10-07T22:44:46Z","date_published":"2020-10-07T22:44:46Z","updated_at":"2026-07-22T22:24:48Z","subjects":["ELECTROCHEMOMECHANICS","SOLID OXIDE CELLS","MIXED IONIC ELECTRONIC CONDUCTORS","OXYGEN SURFACE EXCHANGE","FINITE ELEMENT METHODS"],"languages":["en"],"rights":["Copyright 2020 Rupesh Kumar Mahendran"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/2142/108637","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Sofronis, Petros","Perry, Nicola H","Dadfarnia, Mohsen"]},{"key":"dc:creator","label":"Author","values":["Mahendran, Rupesh Kumar"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2020-10-07T22:44:46Z","2022-10-07T22:44:53Z","2020-07-24","2020-08"]},{"key":"dc:type","label":"Dc Type","values":["text","Thesis"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Mechanical Engineering"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Thesis"]},{"key":"thesis:degree_name","label":"Degree Name","values":["M.S."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois at Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["ELECTROCHEMOMECHANICS","SOLID OXIDE CELLS","MIXED IONIC ELECTRONIC CONDUCTORS","OXYGEN SURFACE EXCHANGE","FINITE ELEMENT METHODS"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 2020 Rupesh Kumar Mahendran"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/108637"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["This thesis presents a model for coupled electrochemomechanics in Mixed Ionic Electronic Conductors (MIEC). A continuum model is formulated to simulate the transport of ionic defects and the stress distribution in the conductor arising from the chemical expansion associated with the defects. First, a finite element formulation of the model is developed and validated with various analytical solutions and comparisons with experimental results. In the third chapter the coupled model is used along with an iterative scheme to simulate the transport characteristics in solid oxide cells with oxygen surface exchange and results are compared with experimental cell operation. The model is used to study the effect of oxygen surface exchange and the bulk diffusion of defects on the performance of solid oxide cell. In the fourth chapter, the transport of ionic defects is studied under spatially varying oxygen surface exchange in solid oxide cells due to the presence of metal current collector. Various defect transport mechanisms (boundary value problem setups) are proposed and studied to identify and explain the influence of metal current collector on oxygen exchange at the electrode film surface.","Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2022-08-01","The student, Rupesh Kumar Mahendran, accepted the attached license on 2020-07-21 at 16:46.","The student, Rupesh Kumar Mahendran, submitted this Thesis for approval on 2020-07-21 at 17:01.","This Thesis was approved for publication on 2020-07-24 at 10:34.","DSpace SAF Submission Ingestion Package generated from Vireo submission #15716 on 2020-10-02 at 15:34:04","Made available in DSpace on 2020-10-07T22:44:46Z (GMT). No. of bitstreams: 3 MAHENDRAN-THESIS-2020.pdf: 3708078 bytes, checksum: 463ee47cd0eb92e25537a9b91dc2fee4 (MD5) Rupesh thesis - final draft_corrected.docx: 4319366 bytes, checksum: baa891bc123f75ecfe18236ec31038ee (MD5) LICENSE.txt: 4219 bytes, checksum: 2eee58e4d1046f8f5db401af57c80c25 (MD5) Previous issue date: 2020-07-24","Embargo set by: Seth Robbins for item 116264 Lift date: 2022-10-07T22:44:53Z Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD system","Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD system","U of I Only"]},{"key":"dc:format","label":"Dc Format","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Electrochemomechanics in Mixed Ionic Electronic Conductors and solid oxide cells"]}]}],"canonical_facts":{"dc:contributor":["Sofronis, Petros","Perry, Nicola H","Dadfarnia, Mohsen"],"dc:creator":["Mahendran, Rupesh Kumar"],"dc:date":["2020-10-07T22:44:46Z","2022-10-07T22:44:53Z","2020-07-24","2020-08"],"dc:description":["This thesis presents a model for coupled electrochemomechanics in Mixed Ionic Electronic Conductors (MIEC). A continuum model is formulated to simulate the transport of ionic defects and the stress distribution in the conductor arising from the chemical expansion associated with the defects. First, a finite element formulation of the model is developed and validated with various analytical solutions and comparisons with experimental results. In the third chapter the coupled model is used along with an iterative scheme to simulate the transport characteristics in solid oxide cells with oxygen surface exchange and results are compared with experimental cell operation. The model is used to study the effect of oxygen surface exchange and the bulk diffusion of defects on the performance of solid oxide cell. In the fourth chapter, the transport of ionic defects is studied under spatially varying oxygen surface exchange in solid oxide cells due to the presence of metal current collector. Various defect transport mechanisms (boundary value problem setups) are proposed and studied to identify and explain the influence of metal current collector on oxygen exchange at the electrode film surface.","Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2022-08-01","The student, Rupesh Kumar Mahendran, accepted the attached license on 2020-07-21 at 16:46.","The student, Rupesh Kumar Mahendran, submitted this Thesis for approval on 2020-07-21 at 17:01.","This Thesis was approved for publication on 2020-07-24 at 10:34.","DSpace SAF Submission Ingestion Package generated from Vireo submission #15716 on 2020-10-02 at 15:34:04","Made available in DSpace on 2020-10-07T22:44:46Z (GMT). No. of bitstreams: 3 MAHENDRAN-THESIS-2020.pdf: 3708078 bytes, checksum: 463ee47cd0eb92e25537a9b91dc2fee4 (MD5) Rupesh thesis - final draft_corrected.docx: 4319366 bytes, checksum: baa891bc123f75ecfe18236ec31038ee (MD5) LICENSE.txt: 4219 bytes, checksum: 2eee58e4d1046f8f5db401af57c80c25 (MD5) Previous issue date: 2020-07-24","Embargo set by: Seth Robbins for item 116264 Lift date: 2022-10-07T22:44:53Z Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD system","Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD system","U of I Only"],"dc:format":["application/pdf"],"dc:identifier":["http://hdl.handle.net/2142/108637"],"dc:language":["en"],"dc:rights":["Copyright 2020 Rupesh Kumar Mahendran"],"dc:subject":["ELECTROCHEMOMECHANICS","SOLID OXIDE CELLS","MIXED IONIC ELECTRONIC CONDUCTORS","OXYGEN SURFACE EXCHANGE","FINITE ELEMENT METHODS"],"dc:title":["Electrochemomechanics in Mixed Ionic Electronic Conductors and solid oxide cells"],"dc:type":["text","Thesis"],"thesis:degree_discipline":["Mechanical Engineering"],"thesis:degree_level":["Thesis"],"thesis:degree_name":["M.S."],"thesis:institution_name":["University of Illinois at Urbana-Champaign"]},"updated_at":"2026-07-22T22:24:48Z"}