Transference Numbers and Ion Coordination Strength for Mg, Na, and K in Solid Polymer Electrolytes.

In solid polymer electrolytes, the transference number ( ) is fundamental for performance as it defines the transport efficiency of the electrochemically active species. For systems "beyond Li", a lack of suitable methods to determine the is limiting the understanding of the ion transport in such systems. In this study, a method based on electrophoretic NMR (eNMR) and electrochemical impedance spectroscopy (EIS) is used to determine the for Na, K, and Mg in poly(ε-caprolactone) (PCL), comparing this to previous results in poly(ethylene oxide).

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

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 is a decisive parameter to rank the electrolyte performance. However, the existing experimental methods for its determination suffer from various intrinsic problems.

Correction: Quantifying the ion coordination strength in polymer electrolytes.

Correction for 'Quantifying the ion coordination strength in polymer electrolytes' by Rassmus Andersson , , 2022, , 16343-16352, https://doi.org/10.1039/D2CP01904C.

Correction: Quantifying the ion coordination strength in polymer electrolytes.

Correction for 'Quantifying the ion coordination strength in polymer electrolytes' by Rassmus Andersson , , 2022, https://doi.org/10.1039/d2cp01904c.

Quantifying the ion coordination strength in polymer electrolytes.

In the progress of implementing solid polymer electrolytes (SPEs) into batteries, fundamental understanding of the processes occurring within and in the vicinity of the SPE are required. An important but so far relatively unexplored parameter influencing the ion transport properties is the ion coordination strength. Our understanding of the coordination chemistry and its role for the ion transport is partly hampered by the scarcity of suitable methods to measure this phenomenon.