In this study, a hydrophobic coating is fabricated on gas distribution layer (GDL) with silica particle/polydimethylsiloxane (PDMS). For the coated GDL surface, the measured water contact angle is about 162° and sliding angle about 5°. The pore size of the coated GDL is about 7.1 μm, and shows low energy resistance to the gas transport. Performance tests of the polymer electrolyte membrane fuel cells (PEMFCs) indicate that PEMFCs made of such GDLs offer the better performance than conventional PEMFCs.
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Wang et al. (2010) studied this question.
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