{"656822":{"#nid":"656822","#data":{"type":"event","title":"MS defense by Conor Evans ","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003ETHE SCHOOL OF MATERIALS SCIENCE AND ENGINEERING\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EGEORGIA INSTITUTE OF TECHNOLOGY\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EUnder the provisions of the regulations for the degree\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EMASTER OF SCIENCE\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003Eon Tuesday April 12, 2022\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E2:00 PM\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003Evia\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EBlueJeans Video Conferencing\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Ca href=\u0022https:\/\/bluejeans.com\/2734022721\/\u0022\u003Ehttps:\/\/bluejeans.com\/2734022721\/\u003C\/a\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003Ewill be held the\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EMASTER\u0026rsquo;S THESIS DEFENSE\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003Efor\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EConor Evans \u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E\u0026ldquo;Enhancing Air Electrode Performance of Solid Oxide Cells by Surface Modification\u0026rdquo; \u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ECommittee Members:\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EProf. Meilin Liu, Advisor, MSE\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EProf. Hamid Garmestani, MSE\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EProf. Preet Singh, MSE\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract:\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003EProton conducting reversible solid oxide cells (P-rSOCs) offer an efficient and clean option for energy storage and conversion. However, one issue holding back this renewable technology is the sluggish oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) kinetics that take place at the air electrode. The air electrode in a P-rSOC is also subject to harsh high steam environments that can cause degradation over time. Catalyst infiltration into the air electrode offers a possible solution to each of these issues. Several catalyst candidates were investigated using the state-of-the-art double perovskite air electrode material, PrBa\u003Csub\u003E0.8\u003C\/sub\u003ECa\u003Csub\u003E0.2\u003C\/sub\u003ECo\u003Csub\u003E2\u003C\/sub\u003EO\u003Csub\u003E5+\u0026delta;\u003C\/sub\u003E (PBCC), as the air electrode backbone. Symmetrical cells with catalyst coated PBCC electrode were primarily used to screen catalyst solutions and isolate the air electrode performance. Electrochemical impedance spectroscopy (EIS) was utilized to measure the electrochemical performance, as well as the long-term stability of catalyst infiltrated symmetrical cells under various testing conditions containing either steam and\/or Cr contaminants. Electrochemical performance of single cells with a catalyst coated PBCC electrode were measured in both the fuel cell mode and the electrolysis cell mode. X- ray diffraction (XRD), Scanning electron microcopy (SEM) and Raman spectroscopy were conducted to characterize surface morphology changes and to gain understanding of surface mechanisms causing degradation to the air electrode during testing.\u0026nbsp; Symmetrical cells infiltrated with a PrCoO\u003Csub\u003E3-\u0026delta;\u003C\/sub\u003E catalyst demonstrated excellent stability and electrochemical performance (as low as 0.147 \u2126 cm\u003Csup\u003E2\u003C\/sup\u003E and no degradation across 500 hrs) against various sources of Cr contaminations at steams concentrations as high as 30% in 600 \u0026deg;C. Single cells infiltrated with PrCoO\u003Csub\u003E3-\u0026delta; \u003C\/sub\u003E\u0026nbsp;that were run in fuel cell mode exhibit a power density of 2.02 W cm\u003Csup\u003E-2\u003C\/sup\u003E at 650\u0026deg;C, a 35.5% increase in performance from the bare single cells. When run in electrolysis mode these same infiltrated single cells demonstrate a current density of -3.22 A cm\u003Csup\u003E-2\u003C\/sup\u003E at 650 \u0026deg;C, a 22.4% improvement from the performance of the bare PBCC single cells. \u0026nbsp;The PrCoO\u003Csub\u003E3-\u0026delta;\u003C\/sub\u003E infiltrated proton conducting reversible single cell was among the best performing P-rSOCs reported in literature.\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"Enhancing Air Electrode Performance of Solid Oxide Cells by Surface Modification"}],"uid":"27707","created_gmt":"2022-03-30 15:15:13","changed_gmt":"2022-03-30 15:15:13","author":"Tatianna Richardson","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2022-04-12T15:00:00-04:00","event_time_end":"2022-04-12T17:00:00-04:00","event_time_end_last":"2022-04-12T17:00:00-04:00","gmt_time_start":"2022-04-12 19:00:00","gmt_time_end":"2022-04-12 21:00:00","gmt_time_end_last":"2022-04-12 21:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"221981","name":"Graduate Studies"}],"categories":[],"keywords":[{"id":"111531","name":"ms defense"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1788","name":"Other\/Miscellaneous"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}}}