Effects of gas-diffusion layer properties on the performance of the cathode for high-temperature polymer electrolyte membrane fuel cell

被引：13

作者：

Chun, Hyunsoo ^{[1
,2
]}

Kim, Do-Hyung ^{[1
]}

Jung, Hyeon-Seung ^{[1
]}

Sim, Jaebong ^{[2
]}

Pak, Chanho ^{[1
]}

机构：

[1] Gwangju Inst Sci & Technol, Inst Integrated Technol, Grad Sch Energy Convergence, Gwangju 61005, South Korea

[2] Seoul Natl Univ, Dept Mech Engn, 1 Gwanak Ro, Seoul 08826, South Korea

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2023年 / 48卷 / 71期

关键词：

Gas-diffusion layer (GDL); High-temperature polymer; electrolyte membrane fuel cell (HT-PEMFC); Fractal theory; Gas permeability; Porosity; MICRO-POROUS LAYER; MICROPOROUS LAYER; PHOSPHORIC-ACID; PEMFC; GDL; POROSITY; CRACKS; MODEL; PAPER;

D O I：

10.1016/j.ijhydene.2023.03.416

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：

The role of the gas-diffusion layer (GDL) in high-temperature polymer electrolyte fuel cell (HT-PEMFC) differs from that in low-temperature PEMFC GDL due to operating conditions and environment. Determining the GDL's structural parameters that affect its transport properties, and how these properties impact HT-PEMFC performance was urgently required. Four commercial GDLs were employed in HT-PEMFC cathode's GDE and was examined using X-mCT, mercury intrusion porosimetry, and an optical microscope to analyze structural parameters and characteristics. Fractal theory was applied to compre-hend the gas transmission property of GDL, and the validity of the theory was confirmed through ex-situ through-plane gas permeability measurement. The analysis indicated that the porosity of GDL influenced by the crack region of the MPL has more impact on the GDL's gas transmission than its thickness. After that, we established a correlation between HT-PEMFC cathode performance and GDL porosity and theoretical gas transmission proper-ties using R2 coefficient of determination.& COPY; 2023 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

引用

页码：27790 / 27804

页数：15

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