Enhancement of mass transport behavior by controlling the surface structure of the porous transport layer for polymer electrolyte membrane water electrolysis

IF 6.1 2区工程技术 Q2 ENERGY & FUELS

Applied Thermal Engineering Pub Date : 2025-03-13 DOI:10.1016/j.applthermaleng.2025.126232

Han Eol Lee , Ta Nam Nguyen , Tuan Linh Doan , Yoonseong Jung , Taekeun Kim

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引用次数: 0

Abstract

Chemical etching is an effective method, frequently used in the modification of the surface and structure of the metals while these two properties are important factors that affect the performance of porous transport layers (PTLs) in polymer electrolyte membrane water electrolysis (PEMWE). In this study, the commercial titanium porous transport layers (Ti-PTLs) are modified with 6 M H₂SO₄ acid for 20 min at various temperatures (40 ℃, 60 ℃, 80 ℃, and 90 ℃). The surface morphology, structure, and electrochemical properties of PTLs are analyzed by scanning electron microscope (SEM), contact angle measurement, porosimeter, polarization, and electrochemical impedance spectroscopy (EIS). The physical and chemical analysis reveals that surface modified PTLs prepared at 80 ℃ and 90 ℃ exhibit a significant increase in porosity due to changes in structure, shape, and interface properties. Consequently, mass transport resistance is significantly reduced. The results indicate that higher temperatures during acid etching lead to increased porosity and hydrophilicity of the PTLs, directly affecting the mass transport phenomenon in PEMWEs.

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来源期刊

Applied Thermal Engineering 工程技术-工程：机械

CiteScore

11.30

自引率

15.60%

发文量

1474

审稿时长

57 days

期刊介绍： Applied Thermal Engineering disseminates novel research related to the design, development and demonstration of components, devices, equipment, technologies and systems involving thermal processes for the production, storage, utilization and conservation of energy, with a focus on engineering application. The journal publishes high-quality and high-impact Original Research Articles, Review Articles, Short Communications and Letters to the Editor on cutting-edge innovations in research, and recent advances or issues of interest to the thermal engineering community.