| INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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| Study on Radial Pores Structure of Microporous Layer with High Mass Transportation in Proton Exchange Membrane Fuel Cells |
| LI Chaolei1,2, MA Zhenxiang1,2, LUO Longyang1,2, YU Honghao1,2, TAN Jinting1,2,*, LI Shang1,2,3, PAN Mu1,2
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1 State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China
2 Hubei Key Laboratory of Fuel Cells, Wuhan University of Technology, Wuhan 430070, China
3 National Energy Key Laboratory for New Hydrogen-Ammonia Energy Technologies, Foshan Xianhu Laboratory, Foshan 528200, Guangdong, China |
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Abstract Microporous layers (MPLs) are the core component for mass transportation in proton exchange membrane fuel cells (PEMFCs), and it is important to improve the water-gas management capability of MPLs to increase the limiting current density as well as the maximum power density of fuel cells. In this work, MPLs with radial channels were prepared by the dynamic ice template method to enhance the water-gas ma-nagement ability. The ethanol bath temperature was also adjusted to change the channel size, and the cell performance was analyzed in detail based on physical characterization and electrochemical test results. It was found that the rise of subcooling degree results in a decrease of channel size. The -20-Cell has the largest channel size (60 μm), which reduces the mass transport impedance by about 54% compared with the conventional MPL, and the power density of the fuel cell can be up to 1.89 W/cm2@3 600 mA/cm2. This work revealed that the development of MPL with radial pores has great significance in enhancing the water-gas management capability of fuel cells at high current densities, and improving cell performance.
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Published: 10 January 2026
Online: 2026-01-09
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2026, Vol. 40 
