文献类型：期刊文献

英文题名：Modeling study on anisotropic transport properties of PEMFC GDLs facilitated by XCT

作者：Liu, Hang[1];Li, Yang[1];Huang, Heng[1];Zhou, Zhifu[2];Wu, Wei-Tao[3];Wei, Lei[4];Lyu, Jizu[5];Hu, Chengzhi[1];Li, Yubai[1];Song, Yongchen[1]

机构：[1]Dalian Univ Technol, Key Lab Ocean Energy Utilizat & Energy Conservat, Minist Educ, Dalian 116024, Peoples R China;[2]Xi An Jiao Tong Univ, State Key Lab Multiphase Flow Power Engn, Xian 710049, Peoples R China;[3]Nanjing Univ Sci & Technol, Sch Mech Engn, Nanjing 210094, Peoples R China;[4]Southern Univ Sci & Technol, Dept Mech & Energy Engn, Shenzhen 518055, Peoples R China;[5]Guangdong Ocean Univ, Sch Mech Engn, Zhanjiang 524088, Peoples R China

年份：2026

卷号：256

外文期刊名：RENEWABLE ENERGY

收录：SCI-EXPANDED(收录号：WOS:001583508200002)、、WOS

基金：This work is supported by the National Natural Science Foundation of China (Grant No. 52106226, 52176058) , supported by Program for Scientific Research Start-up Funds of Guangdong Ocean University (Grant No. 060302062309) .

语种：英文

外文关键词：PEM fuel cells; Diffusivity; Permeability; Pore-throat network structure; Finite element analysis method

外文摘要：The gas diffusion layer (GDL) of proton exchange membrane fuel cells (PEMFCs) is a critical component for the transport of reactants. The efficiency of reactant gas transport remains a major technical challenge in the field today. The anisotropic structure of the GDL gives rise to substantial variations of gas diffusion as well as permeability in different directions. The study employs X-CT technology to obtain the actual GDL's geometry, aiming to investigate a spatial structure at the microscale and its gas transport characteristics. The computational fluid dynamics (CFD) method is used to simulate and study the gas diffusivity and gas permeability of GDL with four different thicknesses. The numerical simulation results show that the diffusivity and permeability in the through-plane (TP) direction are lower than those in the in-plane (IP) direction. Moreover, the effective diffusion coefficient (EDC) decreases with increasing thickness, but is also dependent on the solid fibre structure of GDL. Horizontal alignment of the carbon fibers and the disc-shaped adhesive contributes to the anisotropy between the TP and IP directions, resulting in anisotropic gas transport. The purpose of the study is to supply critical references for manufacturing techniques and optimization of gas transport in GDLs.