Structure and Dynamics in Batteries, Supercapacitors and Fuel Cell Materials
Application of New Experimental and Theoretical Approaches to Study Function
Prof. Clare Gray
Recorded 26 October 2016 in Lausanne, Vaud, Switzerland
Event: MARVEL NCCR - MARVEL Distinguished Lectures, Seminars and Tutorials - 2015 onwards
This talk will describe recent applications of NMR spectroscopy and pair distribution function (PDF) analysis of total scattering data to study electrode materials for energy storage and conversion. In particular, the focus will be on areas of our work where the combination of theory and experiment has been critical for interpreting experimental data and/or for understanding electronic structure. The use of 6,7Li, 23Na and more recently 17O NMR spectroscopy to investigate structural disorder, defects and dynamics in paramagnetic materials will be described. Examples include the development of methods to understand how Mg substitution in Na manganates affects rate performance of a series of layered phases in Na-ion batteries, to quantify stacking faults in intergrowth structures, and to investigate the transport mechanism in the ionic and electronic conductor La2NiO4+. Many battery and supercapacitor materials are amorphous and methods to extract structure from these highly disordered systems and to determine the mechanisms for charge storage will be described.
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