Electrophoretic NMR: an ion speedometer for concentrated electrolytes

During the 47th session of the Global NMR Discussion Meetings held on April 19, 2022 via Zoom, Dr. David Halat from UC Berkeley gave a talk on the topic "Electrophoretic NMR: an ion speedometer for concentrated electrolytes". The recording serves as a tutorial.

Abstract: Pulsed field gradient (PFG) NMR techniques are powerful probes of self-diffusion but remain insensitive to the charged nature of the mobile species. For example, Li-ion battery electrolyte performance is strongly affected by the drift velocity of the working (Li+) cation under an applied potential, and not necessarily to its diffusivity. By synchronizing PFG pulse programs with a simultaneous electric field, electrophoretic NMR (eNMR) can selectively measure cation, anion, and solvent motion and provide a full accounting of ion transport in concentrated electrolytes. I will discuss the experimental and practical underpinnings of eNMR, as well as its complementarity to MD simulations to reveal the migration of specific solvation structures.

Speaker's biography:

2009 — 2013: B.S. Mathematics and Chemistry, Montana State University, USA.

2013 — 2018: Ph.D., University of Cambridge, UK, (with Clare P. Grey)

2018 : Postdoc and FRS Research Associate, University of Cambridge, UK (with Clare P. Grey)

2018 — present: Postdoc, University of California Berkeley, USA (with Jeffrey A. Reimer and Nitash P. Balsara)

Google Scholar: https://scholar.google.com/citations?...

Twitter: @davidhalat