Operando imaging study demonstrates cathode-to-anode water back-diffusion drives drainability in polymer electrolyte fuel cells, highlighting key pathways for electric vehicle optimization.
A multiscale water visualization technique for polymer electrolyte fuel cells was established by using operando multiprobe radiography with pulsed spallation neutron and synchrotron X-ray sources. The three-dimensional water distribution revealed that water back-diffusion from the cathode to the anode significantly contributes to the “drainability” of practical polymer electrolyte fuel cells toward fuel cell electric vehicles.
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Yoshimune et al. (2023) studied this question.
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