Transference Numbers and Ion Coordination Strength for Mg²⁺, Na⁺, and K⁺ in Solid Polymer Electrolytes.

ABSTRACT: In solid polymer electrolytes, the transference number (T _i ) 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 T _i 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 T ₊ for Na⁺, K⁺, and Mg²⁺ in poly(ε-caprolactone) (PCL), comparing this to previous results in poly(ethylene oxide). In common for all cations, a distinct correlation between strong coordination and a low T ₊ is observed. Paradoxical

SUBMITTER: Andersson R 

PROVIDER: S-EPMC11457214 | biostudies-literature | 2024 Oct

REPOSITORIES: biostudies-literature