{"624336":{"#nid":"624336","#data":{"type":"event","title":"PhD Dissertation Proposal Defense by Rebecca Glaser","body":[{"value":"\u003Cp\u003EDISSERTATION PROPOSAL DEFENSE\u003Cbr \/\u003E\r\n\u003Cbr \/\u003E\r\nby\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ERebecca Glaser\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ETitle: Tuning Active Material Microstructure and Electrolyte Composition for Enhanced Performance of High-Loading Cathodes For Lithium-Sulfur Batteries\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThursday, August 15, 2019\u003C\/p\u003E\r\n\r\n\u003Cp\u003E10:00 AM\u003Cbr \/\u003E\r\nin MRDC 3515\u003C\/p\u003E\r\n\r\n\u003Cp\u003ECommittee Members:\u003C\/p\u003E\r\n\r\n\u003Cp\u003EProf. Gleb Yushin, Advisor, MSE\u003C\/p\u003E\r\n\r\n\u003Cp\u003EProf. Jud Ready, GTRI\u003C\/p\u003E\r\n\r\n\u003Cp\u003EMohan Sanghadasa, Ph.D., US Army CCDC Aviation and Missile Center, Redstone Arsenal, AL\u003C\/p\u003E\r\n\r\n\u003Cp\u003EProf. Preet Singh, MSE\u003C\/p\u003E\r\n\r\n\u003Cp\u003EProf. Meilin Liu, MSE\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\u003ELithium sulfur (Li-S) batteries have the potential to revolutionize rechargeable energy storage technologies because they promise high theoretical gravimetric capacity combined with lower cost and lower toxicity. Fabrication of high areal loading (thicker) S cathodes is particularly important for maximizing Li-S cell energy storage characteristics because the weight and volume of inactive cell components (metal current collectors and separator membranes) undesirably contribute a significant portion of that for the otherwise lightweight Li-S cells. Unfortunately, making high-performance energy-dense Li-S cells with thick and dense electrodes is extremely challenging. Here I aim to systematically investigate two strategies for enhancing performance of high-loading S cathodes and uncover fundamental mechanisms that govern the complex structure\/chemistry \u0026ndash; electrochemical performance relationships. First, I will explore the incorporation of layered lithium metal oxides into the design of S-based cathodes. The use of lithium metal oxides has largely not been explored, except in a few earlier studies by our group. I aim to investigate different strategies for the formation of core-shell Li2S\/Li-M-O particles, where M is the selected metal or metal\u0026nbsp;combinations. The selection of particular metals has been motivated by their prior use as polysulfide absorbers with S cathodes. I further aim to study exactly how and why lithium metal oxides affect (possibly improve) cell performance, their dependence on the M composition and relative oxide fraction and the differences between Li-containing metal oxides and their Li-free metal oxide analogs. Second, I will\u0026nbsp;study a relatively unexplored\u0026nbsp;class of\u0026nbsp;electrolytes that\u0026nbsp;offer reduced viscosity,\u0026nbsp;improved\u0026nbsp;wettability, and sufficient\u0026nbsp;solubility of a broader array of salt additives choices.\u0026nbsp;A range of electrolyte compositions will be screened and studied to understand their behavior in cells.\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"Tuning Active Material Microstructure and Electrolyte Composition for Enhanced Performance of High-Loading Cathodes For Lithium-Sulfur Batteries"}],"uid":"27690","created_gmt":"2019-08-12 00:12:53","changed_gmt":"2019-08-12 15:39:52","author":"Jacquelyn Strickland","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2019-08-15T11:00:00-04:00","event_time_end":"2019-08-15T13:00:00-04:00","event_time_end_last":"2019-08-15T13:00:00-04:00","gmt_time_start":"2019-08-15 15:00:00","gmt_time_end":"2019-08-15 17:00:00","gmt_time_end_last":"2019-08-15 17:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"221981","name":"Graduate Studies"}],"categories":[],"keywords":[{"id":"102851","name":"Phd proposal"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1788","name":"Other\/Miscellaneous"}],"invited_audience":[{"id":"78771","name":"Public"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}}}