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SUMMARY:Developing and applying new tools to understand how materials for 
 Li and &quot\;beyond-Li&quot\; battery technologies function - Professor C
 lare Grey\, University of Cambridge
DTSTART:20211019T193000Z
DTEND:20211019T210000Z
UID:TALK163501@talks.cam.ac.uk
CONTACT:Amanda Buckingham
DESCRIPTION:ABSTRACT:\nRechargeable batteries have been an integral part o
 f the portable electronics revolution and are now playing an increasingly 
 important role in transport and grid applications\, but the introduction o
 f these devices comes with different sets of challenges. New technologies 
 are being investigated\, such as those involving reactions between Li and 
 oxygen/sulfur\, using sodium and magnesium ions instead of lithium\, or in
 volving the flow of materials in an out of the electrochemical cell (in re
 dox flow batteries). Importantly\, fundamental science is key to producing
  non-incremental advances and to develop new strategies for energy storage
  and conversion.\n \nThis talk will start by describing existing battery t
 echnologies\, what some of the current and more long-term challenges are\,
  and touch on strategies to address some of the issues. I will then focus 
 on our own work to develop NMR\, MRI and X-ray diffraction methods that al
 low devices to be probed while they are operating (i.e.\, operando). This 
 allows transformations of the various cell components to be followed under
  realistic conditions without having to disassemble and take apart the cel
 l. We can detect side reactions involving the electrolyte and the electrod
 e materials\, sorption processes at the electrolyte-electrode interface\, 
 and processes that occur during extremely fast charging and discharging. M
 any of the battery electrode materials are paramagnetic and their study ha
 s involved the development of new experimental (NMR) and theoretical appro
 aches to acquire and interpret spectra. Recent studies aimed at understand
 ing degradation in NMC-811 (Li[Ni0.8Co0.1Mn0.1]O2) – graphite full cells
  will described. Finally\, new results on redox flow batteries\, extremely
  high-rate batteries and novel NMR approaches to study interfaces will be 
 described.\n\n~~~\n\nCOVID -19 POLICY : We kindly ask attendees to test ne
 gative for COVID -19 by lateral flow the day of the event and to not atten
 d the event if they have any symptoms of COVID -19. In addition\, we stron
 gly encourage attendees to have completed their full course of COVID -19 v
 accines prior to the event. Please wear a face covering whilst not eating 
 or drinking.
LOCATION:The Theatre\, Peterhouse
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