Phys.org

Magnetic field measurements reveal internal current distribution in fuel cells

Proton-exchange membrane fuel cells are promising clean power-generation technologies that do not emit carbon dioxide during operation. However, issues such as flooding (i.e., the accumulation of water generated during operation) and dry-out (i.e., when the electrolyte membrane becomes dehydrated) can result in an uneven internal current distribution. This uneven distribution can impair cell performance and accelerate localized material degradation.