Ion Transport vs. Lifetime: Next-Generation Membranes and Ionomers for Electrochemical Energy Devices

The long-term operational durability of membranes and ionomers represents one of the most pressing — and least resolved — challenges in electrochemical energy devices, including fuel cells, electrolyzers, flow batteries, CO₂ electrolyzers, and advanced batteries. While significant progress has been made in optimizing ion transport properties, sustaining that performance under the harsh, dynamic conditions of real-world device operation remains a critical barrier to commercialization. As industry and research communities push toward higher performance targets, there is mounting demand for materials and evaluation frameworks that can simultaneously deliver efficient ion conductivity and long operational lifetimes.Ionomers — which govern ion transport at catalyst layer interfaces and are as central to device lifetime as the membrane itself — remain underrepresented in durability-focused research and receive particular attention in this topic. Complex degradation pathways, membrane swelling, reactant crossover, water management challenges, and mechanical failure collectively shorten device lifetimes in ways that are difficult to predict and harder to standardize. Advances in accelerated stress testing, in situ characterization, and predictive modeling — including AI-assisted approaches for degradation forecasting and materials screening — are beginning to shed light on these failure modes. Yet a lack of standardized metrics and protocols for assessing durability under device-relevant conditions continues to hinder progress. Emerging research underscores the need to move beyond peak conductivity targets and pursue holistic material strategies that address degradation, mechanical robustness, and realistic operating scenarios across diverse device platforms.This Research Topic aims to accelerate progress at the intersection of ion transport performance and extended membrane and ionomer lifetime in electrochemical energy devices. The central objectives are to deepen mechanistic understanding of degradation and failure modes, to identify material and device-level strategies that extend operational lifetimes, and to foster the development and standardization of reliable durability test methodologies. We invite work that benchmarks new approaches against current state-of-the-art systems and translates laboratory advances into practical, scalable device solutions.We welcome original research articles, reviews, methods articles, and perspectives addressing, but not limited to, the following themes:Development and validation of accelerated stress tests and standardized durability protocols for membranes and ionomersMechanistic studies on degradation, chemical attack, and failure modes under operational conditionsIon transport–lifetime trade-offs: design strategies that simultaneously address conductivity and long-term chemical and mechanical stabilityIonomer degradation and interfacial stability in catalyst layers of electrochemical devicesCrossover control, swelling behavior, and water management under device-relevant conditionsMechanical integrity and failure modes during accelerated and long-term operationAI-assisted approaches for degradation prediction, materials screening, and design optimizationTranslation of fundamental materials research into practical device performance at scaleLifecycle assessment and real-world durability benchmarking of membrane and ionomer systems Topic editors: Guillermo Díaz-Sainz, Vagner Romito De Mendonça, Dr Hammad Nazir, MANUEL AGUILAR-VEGA Source: https://www.frontiersin.org/research-topics/81451/ion-transport-vs-lifetime-next-generation-membranes-and-ionomers-for-electrochemical-energy-devices