Seeing the Unseen: Mg²⁺, Na⁺, and K⁺ Transference Numbers in Post-Li Battery Electrolytes by Electrophoretic Nuclear Magnetic Resonance.

ABSTRACT: The growing demand for energy storage devices worldwide combined with limited resources for lithium attracts interest in other alkali or alkaline earth metals. In addition to conductivity, the cation transference number T₊ is a decisive parameter to rank the electrolyte performance. However, the existing experimental methods for its determination suffer from various intrinsic problems. We demonstrate here a novel approach for T₊ determination based on determining the total conductivity with impedance spectroscopy (IS) and the partial conductivity of the anion species, with the latter being obtained from the anion mobility by electrophoretic NMR. First, this eNMR/IS approach is validated by comparing T₊ values from different methods in a

SUBMITTER: Monich C 

PROVIDER: S-EPMC11048119 | biostudies-literature | 2024 Apr

REPOSITORIES: biostudies-literature