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SUMMARY:The Use Of Synchrotron Radiation For Operando Studies Of Performan
 ce And Failure Of Advanced Batteries - Prof. Paul R. Shearing\, (Universit
 y College London\, UK)
DTSTART:20190301T160000Z
DTEND:20190301T170000Z
UID:TALK122200@talks.cam.ac.uk
CONTACT:Dr Anna Ott
DESCRIPTION:Electrochemical device is a term used to describe a group of t
 echnologies including fuel cells\, batteries\, electrolysers and super-cap
 acitors. Whilst many of these technologies are already in common daily usa
 ge\, for example Li-ion batteries that power our mobile phones\, in the fu
 ture electrochemical devices will play an increasing role in our lives\, f
 rom fuel cells that can power our homes to high performance batteries for 
 our cars. At a microscopic length scale\, these devices can be considered 
 as one of a general class of porous materials\, whereby the physical micro
 structure will influence a range of phenomena\, including diffusion\, cata
 lysis and conductivity. Our ability to engineer these microscopic features
  to maximize performance can be translated to substantial improvements in 
 macroscopic device design. At macroscopic length scales the robustness of 
 device design will influence the system energy and power density and its a
 bility to safely store/convert energy over extended periods of time. These
  materials are likely to evolve over time\, in response to a range of proc
 essing and environmental conditions (sintering\, corrosion\, failure etc).
  Understanding how these changes in microstructure can be linked to degrad
 ation and failure is pivotal to improving device lifetime and safety. Over
  the past 10 years the increasingly widespread use of X-ray imaging and to
 mography has revolutionized our understanding of these materials. With inc
 reasing sophistication researchers have been able to characterize samples 
 over multiple time and length scales from nm to mm and from ms to days. I 
 will discuss how to explore these materials in three and four dimensions\,
  to examine their evolution with time. I will explore case studies that ut
 ilize both laboratory and synchrotron X-ray sources across a range of spat
 ial and temporal domains\, and show how improvements in these imaging tech
 niques\, alongside correlative spectroscopy\, are providing unprecedented 
 insight into these materials and devices. 
LOCATION:Cambridge Graphene Centre Seminar Room
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