文献类型：期刊文献

英文题名：Gas Diffusion Layer with a Regular Hydrophilic Structure Boosts the Power Density of Proton Exchange Membrane Fuel Cells via the Construction of Water Highways

作者：Zhang, Wenhui[1];Guo, Feng[1];Zhou, Yingjie[1];Yu, Shengwei[1];Chen, Aiping[1];Jiang, Hao[1];Jiang, Haibo[1];Li, Chunzhong[1]

机构：[1]East China Univ Sci & Technol, Shanghai Engn Res Ctr Hierarch Nanomat, Sch Mat Sci & Engn, Key Lab Ultrafine Mat,Minist Educ, Shanghai 200237, Peoples R China

年份：2022

卷号：14

期号：15

起止页码：17578

外文期刊名：ACS APPLIED MATERIALS & INTERFACES

收录：;EI(收录号：20221712041123);WOS:【SCI-EXPANDED(收录号:WOS:000797959300058)】；

基金：This work was supported by the National Natural Science Foundation of China (21838003 and 91834301), the Shanghai Scientific and Technological Innovation Project (18JC1410600 and 19JC1410400), the Social Development Program of Shanghai (17DZ1200900), the Innovation Program of Shanghai Municipal Education Commission, and the Fundamental Research Funds for the Central Universities (222201718002).

语种：英文

外文关键词：polymer electrolyte membrane fuel cell; gas diffusion layer; hydrophilic and hydrophobic synergistic structure; water highway; finite element analysis

摘要：The gas diffusion layer (GDL) is an essential carrier for the mass transmission of proton exchange membrane fuel cells (PEMFCs), which decides the peak power density of PEMFCs. Herein, a gas diffusion layer with a regularly arranged hydrophilic and hydrophobic pattern structure was prepared by a template method combined with the ultrasonic spray process. The peak power density was enhanced by 30% (from 520 to 678 mW/cm(2)) compared to an unpatterned structure, and the breakthrough pressure of the GDL was reduced from 13.61 to 2.96 kPa. In addition, the finite element analysis (FEA) results indicate that the polarization curve of calculation was highly consistent with the experimental results. Importantly, the capillary pressure of the hydrophilic area was about 0.3 kPa, much lower than that of the hydrophobic area (2 kPa), demonstrating that the hydrophilic and hydrophobic synergistic structure reduced the water transmission resistance in separating water and oxygen and builds a high-speed channel for water transmission.