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SUMMARY:Following Function in Real Time:  Application of Magnetic Resonanc
 e Methods to Determine Structure and Dynamics in Batteries and Supercapaci
 tors
DTSTART:20161027T163000
DTEND:20161027T173000
DTSTAMP:20260531T005600Z
UID:066f30ee8aaae8c5a6ce36b6ec07107ed22b455b346922dc77c2b6ca
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Clare Grey\nUniversity of Cambridge\, Department of Chem
 istry\nThe development of light\, long-lasting rechargeable batteries has 
 been an integral part of the portable electronics revolution. This revolut
 ion has transformed the way in which we communicate and transfer and acces
 s data globally.  Rechargeable batteries are now poised to play an increa
 singly important role in transport and grid applications\, but the introdu
 ction of these devices comes with different sets of challenges. New techno
 logies are being investigated\, such as those using sodium and magnesium i
 ons instead of lithium\, and the flow of materials in an out of the electr
 ochemical cell (in redox flow batteries).  Importantly\, fundamental scie
 nce is key to producing non-incremental advances and to develop new strate
 gies for energy storage and conversion. \n\n \n\nThis talk will focus on
  our work on the development of methods that allow devices to be probed wh
 ile they are operating (i.e.\, in-situ). This allows\, for example\, the t
 ransformations of the various cell components to be followed under realist
 ic conditions without having to disassemble and take apart the cell.  To 
 this end\, the application of new in and ex-situ Nuclear Magnetic Resonanc
 e (NMR)\, magnetic resonance imaging (MRI) and X-ray diffraction approache
 s to correlate structure and dynamics with function in lithium- and sodium
 -ion batteries and supercapacitors will be described. The in-situ approach
  allows processes to be captured\, which are very difficult to detect dire
 ctly by ex-situ methods.  For example\, we can detect side reactions invo
 lving the electrolyte and the electrode materials\, sorption processes at 
 the electrolyte-electrode interface\, and processes that occur during extr
 emely fast charging and discharging. Complementary Ex-situ NMR investigati
 ons allow more detailed structural studies to be performed\, to correlate 
 local and long-range structure with performance. 
LOCATION:CH G1 495 https://plan.epfl.ch/?room==CH%20G1%20495
STATUS:CONFIRMED
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