Effect of porous transport layers on the limiting current density of PEM electrolysis cells -visualization and numerical analysis-

被引：0

作者：

Ma, Songsong ^{[1
]}

Saitou, Tomoko ^{[1
]}

Nakajima, Hironori ^{[1
,2
]}

Ito, Kohei ^{[1
,2
,3
]}

机构：

[1] Kyushu Univ, Grad Sch Engn, Dept Hydrogen Energy Syst, 744 Motooka,Nishi Ku, Fukuoka 8190385, Japan

[2] Kyushu Univ, Fac Engn, Dept Mech Engn, 744 Motooka,Nishi Ku, Fukuoka 8190385, Japan

[3] Kyushu Univ, Int Inst Carbon Neutral Energy Res WPI I2 CNER, 744 Motooka,Nishi Ku, Fukuoka 8190395, Japan

来源：

JOURNAL OF POWER SOURCES | 2025年 / 632卷

关键词：

Porosity; Mass transport; Bubble dynamics; Dry out; Frequency analysis; Boundary conditions; 2-PHASE FLOW; WATER; MASS; PERFORMANCE; DEGRADATION; EFFICIENCY;

D O I：

10.1016/j.jpowsour.2025.236292

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Porous transport layers (PTL) in polymer electrolyte membrane electrolysis cells ensure gas/liquid mass transport at the anode, and determine the feasibility of high current density operation up to the limiting current density (LCD). This study examined the effect of anode PTL properties on LCD by varying porosities of 45 %, 56 %, and 72 %. Electrochemical characterizations suggest that the mass transport limitation leads to an abrupt increase in the electrolysis voltage and membrane dehydration, and also indicate that the PTL with the largest porosity of 72 % achieves the largest LCD compared to the other two PTLs with smaller porosities. Moreover, visualization experiments with a high-speed microscope captured the bubble detachment sites at the interface between flow channel and PTL, and reveal that a larger PTL porosity increases the density of the detachment sites. Additionally, a correlation emerges between the bubble flow regimes at the anode channel and periodic changes of the current density. A numerical analysis incorporating the visualized bubble behavior into the boundary condition successfully predicts the dependence of the porosity on the LCD, in agreement with the experimental results. The analysis also demonstrates that a larger porosity contributes to reducing the gas saturation and enhancing the LCD.

引用

页数：13

共 40 条

[1] Shiva Kumar S., Himabindu V., Hydrogen production by PEM water electrolysis – a review, Mater Sci Energy Technol, 2, pp. 442-454, (2019)
[2] Carmo M., Fritz D.L., Mergel J., Stolten D., A comprehensive review on PEM water electrolysis, Int. J. Hydrogen Energy, 38, pp. 4901-4934, (2013)
[3] Villagra A., Millet P., An analysis of PEM water electrolysis cells operating at elevated current densities, Int. J. Hydrogen Energy, 44, pp. 9708-9717, (2019)
[4] Doan T.L., Lee H.E., Shah S.S.H., Kim M., Kim C.-H., Cho H.-S., Et al., A review of the porous transport layer in polymer electrolyte membrane water electrolysis, Int. J. Energy Res., 45, pp. 14207-14220, (2021)
[5] Pushkarev A.S., Pushkareva I.V., Solovyev M.A., Prokop M., Bystron T., Rajagopalan S.K., Et al., On the influence of porous transport layers parameters on the performances of polymer electrolyte membrane water electrolysis cells, Electrochim. Acta, 399, (2021)
[6] Lickert T., Kiermaier M.L., Bromberger K., Ghinaiya J., Metz S., Fallisch A., Et al., On the influence of the anodic porous transport layer on PEM electrolysis performance at high current densities, Int. J. Hydrogen Energy, 45, pp. 6047-6058, (2020)
[7] Majasan J.O., Iacoviello F., Cho J.I.S., Maier M., Lu X., Neville T.P., Et al., Correlative study of microstructure and performance for porous transport layers in polymer electrolyte membrane water electrolysers by X-ray computed tomography and electrochemical characterization, Int. J. Hydrogen Energy, 44, pp. 19519-19532, (2019)
[8] Mo J., Kang Z., Yang G., Retterer S.T., Cullen D.A., Toops T.J., Et al., Thin liquid/gas diffusion layers for high-efficiency hydrogen production from water splitting, Appl. Energy, 177, pp. 817-822, (2016)
[9] Parra-Restrepo J., Bligny R., Dillet J., Didierjean S., Stemmelen D., Moyne C., Et al., Influence of the porous transport layer properties on the mass and charge transfer in a segmented PEM electrolyzer, Int. J. Hydrogen Energy, 45, pp. 8094-8106, (2020)
[10] Li Y., Kang Z., Mo J., Yang G., Yu S., Talley D.A., Et al., In-situ investigation of bubble dynamics and two-phase flow in proton exchange membrane electrolyzer cells, Int. J. Hydrogen Energy, 43, pp. 11223-11233, (2018)

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