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Following Function in Real Time - New NMR and MRI Methods for Studying Structure and Dynamics in Batteries and Supercapacitors

Prof. Clare P. Grey (University of Cambridge, UK / Stony Brook University, NY, USA)

08 Nov 2013 14:00
08 Nov 2013
Forschungszentrum Jülich, Auditorium (Central Library, Building 04.7)

A full understanding of the operation of a battery and supercapacitor requires that we utilize methods that allow devices or materials to be probed while they are operating (i.e., in-situ). This allows, for example, the transformations of the various cell components to be followed under realistic conditions without having to take apart the cell. To this end, the application of new in and ex-situ nuclear magnetic resonance (NMR) and magnetic resonance imaging (MRI) approaches to correlate structure and dynamics with function in lithium ion and lithium air batteries and supercapacitors will be described.

The in-situ approach allows processes to be captured, which are very difficult to detect directly by ex-situ methods. For example, we can detect side reactions involving the electrolyte and the electrode materials, sorption processes at the electrolyte-electrode interface, and processes that occur during extremely fast charging and discharging. Ex-situ NMR investigations allow more detailed structural studies to be performed to correlate local and long-range structure with performance in both batteries and fuel cell materials.

The entrance to this lecture is free.