Single-ion Solid Polymer Electrolytes by Design: Chemistries, Architectures and Functional Trade-Offs

Abstract

This review highlights recent advances in single-ion polymer electrolytes (SIPEs), with particular emphasis on how molecular design, through tailored chemistries, macromolecular architectures, and controlled morphologies, governs their structure-properties relationship. We examine emerging strategies that link ion transport, mechanical behavior, and electrochemical stability to specific molecular and supramolecular features, providing an overview of the most recent developments in the field. In parallel, a growing shift toward a holistic approach in material design is noted, where SIPEs are increasingly evaluated not only as fundamental ionconducting systems but as multifunctional materials capable of integration into practical devices. By connecting molecular engineering with processing considerations and long-term functionality, this review outlines how SIPEs research is evolving toward materials-oriented solutions that support their translation into robust, high-performance technologies.