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DTSTART;TZID=America/New_York:20211006T153000
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DTSTAMP:20260406T125508
CREATED:20210826T180855Z
LAST-MODIFIED:20210826T180855Z
UID:5272-1633534200-1633537800@seasevents.nmsdev7.com
SUMMARY:CBE Seminar: "Electrolytes for High Energy Li-ion and Li Metal Batteries"
DESCRIPTION:Abstract \nElectrolytes are critical enabling components for Li-ion batteries to safely operate within a wide temperature range\, under extreme fast charging\, and under intense abuse conditions without sacrificing energy density and cycle life. Current electrolytes cannot satisfy these requirements. We developed advanced all-fluorinated electrolytes\, water-in-sale (WIS) electrolytes and solid-state electrolytes aiming to simultaneously enhance cell energy density and safety.  Guided by the electrolyte design principle for high-capacity electrodes with large volume changes\, we developed serval organic liquid electrolytes suitable for micro-sized Si and Li metal anodes and NMC cathodes. We also reduced the salt concentration of water-in-salt electrolytes from 21m to 4.5m\, and extended the electrochemical stability window from 3.0V of WIS to 3.4V. These improved electrolytes enable LiMn2O4/Li4Ti5O12 pouch cells with an areal capacity of 2.5 mAh/cm2 and a P/N capacity ratio of 1.14 to achieve a long cycle life of 500. For solid state electrolyte Li metal batteries\, we suppressed the Li dendrite growth and reduced the interface resistance by constructing a lithionphobic-lithiophoilic interlayer between solid electrolyte and Li metal anodes. The critical role of solid electrolyte interphase in accommodating electrode volume changes was also investigated.
URL:https://seasevents.nmsdev7.com/event/cbe-seminar-electrolytes-for-high-energy-li-ion-and-li-metal-batteries/
LOCATION:Wu and Chen Auditorium (Room 101)\, Levine Hall\, 3330 Walnut Street\, Philadelphia\, PA\, 19104\, United States
CATEGORIES:Seminar
ORGANIZER;CN="Chemical and Biomolecular Engineering":MAILTO:cbemail@seas.upenn.edu
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