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VERSION:2.0
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CALSCALE:GREGORIAN
X-WR-CALNAME:MSE Seminar Series Presents - Prof. Lauren Marbella
X-WR-TIMEZONE:Eastern Time (US & Canada)
BEGIN:VEVENT
DTSTAMP:20260715T045659Z
UID:tag:localist.com\,2008:EventInstance_39199259977707
DTSTART:20220308T190000Z
DTEND:20220308T200000Z
DESCRIPTION:Title: Resolving Chemical and Spatial Heterogeneities at Comple
 x Electrochemical Interfaces in Li ion Batteries\n\nAbstract: \nThe develo
 pment of cheap\, high energy density electrode materials for Li ion batter
 ies (LIBs) is critical to reaching net zero emissions targets and mitigati
 ng climate change. To this end\, Ni- and Mn-rich transition metal oxide ca
 thodes simultaneously offer high energy densities as well as cost effectiv
 e solutions for LIBs. Despite the immense potential of these materials\, b
 oth Ni- and Mn-rich cathodes suffer from severe interfacial instabilities 
 that lead to crystallographic rearrangement of the active material surface
 \, transition metal dissolution\, and the formation of a cathode electroly
 te interphase (CEI) layer on the composite surface during electrochemical 
 cycling. While changes in the crystallographic structure of these material
 s are readily detected with diffraction-based methods\, probing the chemis
 try associated with transition metal dissolution and characterizing the di
 sordered\, heterogeneous CEI layer have proven to be substantially more ch
 allenging. In this talk\, I will discuss our efforts to use a combination 
 of solid-state nuclear magnetic resonance (SSNMR) spectroscopy and X-ray p
 hotoemission electron microscopy (XPEEM) to provide information on the CEI
  deposited on composite cathode films with high chemical and spatial resol
 ution (on the order of nanometers). In situ and operando magnetic resonanc
 e spectroscopies are used to correlate specific cathode degradation modes 
 with electrolyte oxidation events. The final properties of the resulting C
 EI architectures are evaluated in the context of battery performance\, whe
 re poor capacity retention and high interfacial resistance in LIBs is rela
 ted to specific surface moieties on the cathode composite.
GEO:42.358262;-71.090045
LOCATION:Building 6\, 6-104\, Chipman Room
SUMMARY:MSE Seminar Series Presents - Prof. Lauren Marbella
URL;VALUE=URI:https://calendar.mit.edu/event/MSE_Seminar_Marbella
CATEGORIES:Conferences/Seminars/Lectures
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