Formation of Liquid Water Pathways in PEM Fuel Cells: A 3-D Pore-Scale Perspective | Zendy

Pranay Shrestha | Zendy; ChungHyuk Lee | Zendy; Kieran F. Fahy | Zendy; Manojkumar Balakrishnan | Zendy; Nan Ge | Zendy; Aimy Bazylak | Zendy

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Formation of Liquid Water Pathways in PEM Fuel Cells: A 3-D Pore-Scale Perspective

Author(s) -

Pranay Shrestha,

ChungHyuk Lee,

Kieran F. Fahy,

Manojkumar Balakrishnan,

Nan Ge,

Aimy Bazylak

Publication year - 2020

Publication title -

journal of the electrochemical society

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.258

H-Index - 271

eISSN - 1945-7111

pISSN - 0013-4651

DOI - 10.1149/1945-7111/ab7a0b

Subject(s) - wetting , liquid water , proton exchange membrane fuel cell , chemical engineering , cathode , synchrotron , materials science , fuel cells , chemistry , composite material , geology , optics , earth science , physics , engineering

We investigated the 3-D pore-scale liquid water distribution within the cathode GDL via in operando synchrotron X-ray tomography during low current density fuel cell operation to capture the early appearance of liquid water pathways. We found that the invasion of liquid water into the GDL only partially filled certain GDL pores. Liquid water preferentially flowed along some GDL fibers, which was attributed to the hydrophilic nature of carbon fiber and the presence of pore-scale mixed wettability within the GDLs.

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