BEGIN:VCALENDAR VERSION:2.0 X-WR-CALNAME:EventsCalendar PRODID:-//hacksw/handcal//NONSGML v1.0//EN CALSCALE:GREGORIAN BEGIN:VTIMEZONE TZID:America/New_York LAST-MODIFIED:20240422T053451Z TZURL:https://www.tzurl.org/zoneinfo-outlook/America/New_York X-LIC-LOCATION:America/New_York BEGIN:DAYLIGHT TZNAME:EDT TZOFFSETFROM:-0500 TZOFFSETTO:-0400 DTSTART:19700308T020000 RRULE:FREQ=YEARLY;BYMONTH=3;BYDAY=2SU END:DAYLIGHT BEGIN:STANDARD TZNAME:EST TZOFFSETFROM:-0400 TZOFFSETTO:-0500 DTSTART:19701101T020000 RRULE:FREQ=YEARLY;BYMONTH=11;BYDAY=1SU END:STANDARD END:VTIMEZONE BEGIN:VEVENT CATEGORIES:College of Arts and Sciences,Lectures and Seminars,Thesis/Disser tations DESCRIPTION:Title: Synthesis, Characterization, and Tuning of Metal Hexacya noferrates for Application in Redox Mediated Flow Battery Systems Advisor: Dr. Patrick Cappillino, Chemistry & Biochemistry Dept. Committee Members: Dr. David Manke, Chemistry & Biochemistry Dept. & Dr. Maricris Mayes, Che mistry & Biochemistry Dept. Abstract: Growing energy demands necessitate o ptimized battery storage systems. Redox mediated flow batteries (RMFBs) pr ovide a unique solution, combining the decoupled energy and power of a flo w-battery with the high energy density of a solid-state battery. This wor k aims to synthesize and characterize a solid active material (SAM) that c an be added to the battery system to boost the overall energy density via an indirect reduction-oxidation reaction. To this extent, metal hexacyanom etalates (MHCM) are considered an optimal SAM due to their tunable reducti on potential, stability, and accessibility. Four MHCMs - manganese, cobalt , nickel, and copper hexacyanoferrate - were synthesized and characterized via cyclic voltammetry, Fourier transform infrared spectroscopy, and scan ning electron microscopy. As a SAM, the redox potential of MHCMs must be r eadily tuned to match the proposed mediator. Within an RMFB system, the me diator solution contains redox-active species that shuttle electrons throu ghout. Ensuring a match between the SAM and mediator optimizes the perform ance and capability of the RMFB. One method of tuning SAM redox potential is via electrolyte additives. The addition of crown ethers were determined to have a significant impact on the potential of the system, controlling the intercalation of cations to the MHCM lattice by forming a more stable complex with them in solution than their solvated state. Specifically, 18- Crown-6 ether’s ability to form a stable complex with K+ enables the red ox potential of the reaction to be further tuned towards a more negative r eduction potential. The results of this work contribute towards building a library of metal hexacyanometalates, improving the overall understanding of these compounds and their role as a “booster” material in RMFBs.   Zoom Meeting ID: 868 2336 3937 & Passcode: N9EkT6\nEvent page: https://www .umassd.edu/events/cms/20260820-ms-thesis-defense-by-daphne-poirier.php\nE vent link: https://us05web.zoom.us/j/86823363937?pwd=niAJRp2lT2bHYbCJWoGZa Ak58YgXC0.1 X-ALT-DESC;FMTTYPE=text/html:

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Title: Synthesis\, Characteriza tion\, and Tuning of Metal Hexacyanoferrates for Application in Redox Medi ated Flow Battery Systems

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Advisor: Dr. Patrick Cappillino\, Chemis try & Biochemistry Dept.

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Committee Members: Dr. David Manke\, Chem istry & Biochemistry Dept. & Dr. Maricris Mayes\, Chemistry & Biochemistry Dept.

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Abstract:

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Growing energy demands necessitate optimi zed battery storage systems. Redox mediated flow batteries (RMFBs) provide a unique solution\, combining the decoupled energy and power of a flow-battery with the high energy density of a solid-state battery. This work aims to synthesize and characterize a solid active material (SAM) tha t can be added to the battery system to boost the overall energy density v ia an indirect reduction-oxidation reaction. To this extent\, metal hexacy anometalates (MHCM) are considered an optimal SAM due to their tunable red uction potential\, stability\, and accessibility. Four MHCMs - manganese\, cobalt\, nickel\, and copper hexacyanoferrate - were synthesized and char acterized via cyclic voltammetry\, Fourier transform infrared spectroscopy \, and scanning electron microscopy.

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As a SAM\, the redox potentia l of MHCMs must be readily tuned to match the proposed mediator. Within an RMFB system\, the mediator solution contains redox-active species that sh uttle electrons throughout. Ensuring a match between the SAM and mediator optimizes the performance and capability of the RMFB. One method of tuning SAM redox potential is via electrolyte additives. The addition of crown e thers were determined to have a significant impact on the potential of the system\, controlling the intercalation of cations to the MHCM lattice by forming a more stable complex with them in solution than their solvated st ate. Specifically\, 18-Crown-6 ether’s ability to form a stable complex with K+ enables the redox potential of the reaction to be further tuned to wards a more negative reduction potential. The results of this work contri bute towards building a library of metal hexacyanometalates\, improving th e overall understanding of these compounds and their role as a “booster ” material in RMFBs.

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 Zoom Meeting ID: 868 2336 3937 & Passcode : N9EkT6

Event page: /event s/cms/20260820-ms-thesis-defense-by-daphne-poirier.php
Event link:

DTSTAMP:20260807T115447 DTSTART;TZID=America/New_York:20260820T100000 DTEND;TZID=America/New_York:20260820T120000 LOCATION:SENG 115 SUMMARY;LANGUAGE=en-us:MS Thesis Defense by Daphne Poirier, "Synthesis, Cha racterization, and Tuning of Metal Hexacyanoferrates for Application in Re dox Mediated Flow Battery Systems" UID:fc157a9546c7aca8ee02e4dcdd7f8ce4@www.umassd.edu END:VEVENT END:VCALENDAR