{"682796":{"#nid":"682796","#data":{"type":"event","title":"BioE MS Thesis Presentation - Camden Kitchen","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EAdvisor:\u003C\/strong\u003E\u003C\/p\u003E\u003Cp\u003EStanislav Emelianov, Ph. D. (School of Electrical and Computer Engineering, Georgia Institute of Technology)\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp\u003E\u003Cstrong\u003ECommittee Members:\u003C\/strong\u003E\u003C\/p\u003E\u003Cp\u003EOmer Inan, Ph.D. (School of Electrical and Computer Engineering, Georgia Institute of Technology)\u003C\/p\u003E\u003Cp\u003ERafael Davalos, Ph.D.\u0026nbsp;(Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology)\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp\u003E\u003Cstrong\u003EOptimal Galvanic Cell Design for Powering Ingestible Devices in Varying Gastrointestinal Conditions\u003C\/strong\u003E\u003C\/p\u003E\u003Cp\u003EEnergy harvesting using galvanic cells in the gastrointestinal (GI) tract can provide supplementary power and prolong the service life of ingestible devices. This work explores the impact of electrode type, dimension, load resistance, and varying GI conditions on the performance of galvanic cells for powering ingestible devices. \u003Cem\u003EIn vitro\u003C\/em\u003E experiments were conducted with varying cathode and anode combinations in synthetic gastric fluid (SGF) under a load resistance sweep to measure the voltage of the galvanic cell over time. 23 tests assessed the peak power, energy capacity, and longevity of each electrode pair. Galvanic cell performance was also evaluated under simulated GI conditions (including varying pH, salt concentration, added foreign substances, and simulated intestinal conditions), varying electrode dimensions, and varying set load resistances. Pt and Pd cathodes showed the highest peak power and energy capacity, while Mo was cost-effective for transient applications. Mg was the optimal anode for short-term use, while Zn, the AZ31B Mg alloy, or a Zn-Mg hybrid were preferred for long-term applications. Energy generation decreased with increasing pH but improved with higher salt concentration. Large substances in gastric fluid hindered performance, and energy generation in intestinal fluids was less efficient. Larger cathode-to-anode size ratios increased efficiency, while larger anodes provided greater longevity. Power efficiency was observed to be highest for the Pt-Zn and Pt-AZ31 combinations when the internal resistance was equal to the load resistance but was higher for Pt-Mg as the load resistance increased. This study successfully characterized the effects of electrode combinations, dimensions, GI conditions, and load resistance on the performance of galvanic cells, offering insight into the design of supplementary power sources for short-term and long-term applications in ingestible devices.\u003C\/p\u003E","summary":"","format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Cp\u003EBioE MS Thesis Presentation - Optimal Galvanic Cell Design for Powering Ingestible Devices in Varying Gastrointestinal Conditions - Camden Kitchen\u003C\/p\u003E","format":"limited_html"}],"field_summary_sentence":[{"value":"\u0022Optimal Galvanic Cell Design for Powering Ingestible Devices in Varying Gastrointestinal Conditions\u0022"}],"uid":"36617","created_gmt":"2025-06-16 14:21:45","changed_gmt":"2025-06-16 14:23:57","author":"lwood34","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2025-06-30T14:00:00-04:00","event_time_end":"2025-06-30T16:00:00-04:00","event_time_end_last":"2025-06-30T16:00:00-04:00","gmt_time_start":"2025-06-30 18:00:00","gmt_time_end":"2025-06-30 20:00:00","gmt_time_end_last":"2025-06-30 20:00:00","rrule":null,"timezone":"America\/New_York"},"location":"EBB CHOA","extras":[],"groups":[{"id":"65448","name":"Bioengineering Graduate Program"}],"categories":[],"keywords":[{"id":"172056","name":"go-BioE"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}}}