Quantifying Ionic Conductivity and Cation Transfer Coefficient in Lithium-ion Battery Electrolytes by Diffusion Ordered NMR Spectroscopy
To increase the performance of batteries, it is critical to be able to characterize the mobility of ions in the electrolyte. Due to the chemical nature of the electrolytes’ components, multi-nuclear NMR spectroscopy can be used to gain insight, quantify, and understand changes in the electrical conductivity of the electrolyte. Using information from DOSY NMR measurements, the properties of the electrolyte can be optimized in a targeted and efficient manner. It can also help determine the electrolyte contribution to the total performance of the cell. Electrolytes extracted from cycled test cells can also be investigated after the formation process which helps to better understand structural changes. Dread about how this information can shorten the time for formulation optimization, which also shortens time-to-market for new batteries.