Akademik Veri Yönetim Sistemi
Fuel, cilt.416, 2026 (SCI-Expanded, Scopus)
The wettability–corrosion trade-off in liquid/gas diffusion layers (LGDLs) of PEM water electrolyzers remains a persistent challenge in achieving both long-term durability and efficient electrochemical performance. In this study, titanium-based porous LGDLs with varying porosity levels were fabricated via Selective Laser Melting (SLM) and systematically investigated to resolve this design conflict. Three distinct porosity configurations (S1, S2, S3) were produced by adjusting laser parameters, resulting in increasing open porosity and decreasing wettability (contact angle increased from ∼ 60° in S1 to ∼ 118° in S3). Electrochemical testing demonstrated that the highest-porosity sample (S3) achieved the highest corrosion resistance, with a current density of only 20.18 μA·cm−2. Remarkably, despite its low wettability, S3 also exhibited the best PEM cell performance, reaching a peak current density of 29 mA.cm−2 at 2.0 V, which is more than 20 % of that of S1. This enhancement is attributed to the improved gas/liquid transport efficiency afforded by the interconnected high-porosity network, especially under pressurized flow conditions, which dominates over surface wetting effects. These results highlight that engineering porosity through SLM can simultaneously optimize corrosion resistance and electrochemical output, offering a promising pathway toward more durable and efficient LGDLs for next-generation PEM water electrolyzers in clean hydrogen production systems.