Secondary Electron Hyperspectral Imaging (SEHI) in FIB - SEM for Proton Exchange Membrane Fuel Cells Technology.

ABSTRACT: The performance of proton exchange membrane (PEM) fuel cells critically depends on the microstructure and chemistry of their constituent materials, particularly the catalyst layer (CL), carbon black (CB), ionomer films, and reinforced membranes. However, the highly heterogeneous and nanoscale nature of these components presents significant challenges for existing characterization techniques. This study explores the application of Secondary Electron Hyperspectral Imaging (SEHI) in focused ion beam-scanning electron microscopy (FIB-SEM) to address these limitations. SEHI uniquely integrates chemical sensitivity, surface specificity, and nanoscale spatial resolution, enabling detailed insights into key functional materials. Carbon black analysis revealed the spatial distribution of graphitise

SUBMITTER: Farr NTH 

PROVIDER: S-EPMC12917646 | biostudies-literature | 2026 Feb

REPOSITORIES: biostudies-literature