Work

Failure modes of polymer electrolyte membrane fuel cell membrane-electrode assemblies in air-independent applications

Year: 2025

Type: article

Abstract: Air-independent polymer electrolyte membrane fuel cells (PEMFCs) operate with pure O 2 in closed systems, subjecting membrane-electrode assemblies (MEAs) to high O 2 activity, prolonged high-voltage idling, and humidity or pressure transients. Durable performance under these air-independent propulsion (AIP)-specific stressors is critical for sustainable, long-endurance power systems. However, systematic investigations of MEA failure mechanisms under AIP conditions remain limited. This study addresses the key question of which degradation pathways dominate under representative AIP operating profiles. Five protocols—open-circuit voltage holding, load and relative-humidity cycling, and constant-current operation in recirculation and dead-end modes—were evaluated, revealing radical attack and mechanical fatigue as the primary degradation factors for MEAs in AIP systems.

Source: Case Studies in Thermal Engineering

DOI: 10.1016/j.csite.2025.107455

Authors: Jinhyuk Lim, Junmo Koo, Joon Hyung Shim

Institutions: Korea Automotive Technology Institute, Korea Maritime and Ocean University, Korea University

Language: English

Topic: Fuel Cells and Related Materials

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: gold

Estimated APC paid: $1,620