Pulsed Field Gradient Nuclear Magnetic Resonance and Diffusion Analysis in Battery Research (Review)

PFG-NMR presents a powerful opportunity for battery scientists to quantify electrolyte properties, including transference numbers, solvation structures of active ions, and time scales for dynamics.

Scientific Achievement

A pedagogical overview of Pulsed Field Gradient Nuclear Magnetic Resonance (PFG-NMR) analysis for battery electrolytes provides a guide for new and seasoned practitioners, while demonstrating the many uses of diffusion measurements through a review of selected examples.

Significance and Impact

Many battery scientists have begun to utilize PFG-NMR to examine their electrolyte materials, obtaining quantitative measurements that are then interpreted in terms of electrolyte properties. Since many researchers are not intimately familiar with this technique and its technical limitations, we provide a clear description of PFG-NMR with a focus on practical experimental aspects and ultimate applications to battery electrolytes.

Research Details

  • We introduce basic PFG-NMR experiments, parameters, artifacts and their diagnoses, and the proper setup for acquiring accurate diffusion coefficients.
  • Examples include extraction of dynamic and structural properties of a wide range of electrolyte types (i.e., dilute, concentrated, polymer, and solid-state) through a review of many literature examples.

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DOI:  10.1021/acs.chemmater.1c02891

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