Insights into Membrane Aging in PEM Electrolyzers: A Semi-Empirical Modelling Approach

Abstract

Objective – This study aims to address the degradation of proton exchange membrane (PEM) within an electrolyzer, a key factor limiting its lifetime and efficiency, by developing a semi-empirical model. The model integrates electrochemical factors, providing insights into membrane degradation. Findings – The proposed model, validated with experimental data, reveals critical interactions that drive PEM aging and highlights the influence of various parameters on the performance of aged electrolyzer. It also identifies operational strategies that could help mitigating degradation, supporting optimized, durable electrolyzer performance, especially under dynamic operating conditions caused by renewable energy sources. Originality – This work presents a novel equivalent electrical model specifically tailored to simulate PEM aging, establishing a predictive tool for setting optimal operating conditions. The model’s unique approach offers valuable guidance for operators aiming to extend PEM electrolyzer lifespan under variable operational conditions.