· 논문명 : Natural TPMS porous architectures for flow-field patterns to improve mass transport in high current density 

                operations of proton exchange membrane fuel cells

· 저   자 : Phuc Ho-Van, Ocktaeck Lim*

· 게재지 : Applied Energy (2025, 381, 125126)

· 초록

Extending the ability to work at high current densities in proton-exchange membrane fuel cells (PEMFCs) is imperative for widespread

adoption. Notably, multiple studies point to developing suitable flow-field patterns to mitigate mass- limited losses, yet there is no flow

field that can effectively address the dual challenges of water flooding and fuel starvation in these operating conditions. In this study, 

we introduced a novel approach by integrating nature-inspired triply periodic minimal surface-based (TPMS) porous architectures into

the PEMFC flow field. Our numerical results  suggest that the G-ligament network (G25L-FF) is the most promising solution. Periodic,

non-tortuous pores effectively guide airflow toward gas diffusion layer (GDL), making G25L-FF achieve the lowest pressure drop 

among the proposed flow fields. MATLAB-based image processing reveals that G25L-FF keeps O2 evenly distributed, leading to a 

current density of 1.91 A/cm2 at a cell voltage of 0.4 V - 5 % greater than the state-of-the-art 3D fine-mesh flow field (3DFF) based 

on Toyota Mirai. An almost linear relationship in the polarization curve with no decline in the power density  was also observed. 

Additionally, the G25L-FF shown the lowest water content in both vapor and liquid phases within the porous media but still achieved

optimal membrane hydration, demonstrating its capability to prevent both drying  and flooding. On the other hand, the I-ligament 

network improved reactant distribution uniformity over conventional parallel flow field (CPFF) due to its smaller local rib area, leading

to an 8–15 % increase in current density in the ohmic loss region. Although it falls short in supporting forced convective gas 

penetration into the GDL, resulting in a current density of 1.7 A/cm2 against 1.82 A/cm2 for 3DFF, it nevertheless increased peak

power density by 18 % over CPFF. Our findings provide initial insight into the outstanding performance of the G-ligament network, 

confirming its potentialto address mass-transport limitation, thereby extending the operational range of PEMFCs at high current 

densities and providing a new direction for next-generation flow-field designs.