文献类型：期刊文献

英文题名：From channel flooding to voltage instability: Investigating the impact mechanism in proton exchange membrane fuel cells

作者：Zhang, Xiaoqing[1];Xu, Kai[4];Du, Haoyu[4];Ma, Xiao[4];Qin, Yanzhou[5];Shuai, Shijin[4];Xuan, Fuzhen[1,2,3]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Shanghai Key Lab Intelligent Sensing & Detect Tech, Shanghai 200237, Peoples R China;[3]East China Univ Sci & Technol, Key Lab Pressure Syst & Safety, Minist Educ, Shanghai 200237, Peoples R China;[4]Tsinghua Univ, Sch Vehicle & Mobil, State Key Lab Intelligent Green Vehicle & Mobil, Beijing 100084, Peoples R China;[5]Tianjin Univ, State Key Lab Engines, Tianjin 300354, Peoples R China

年份：2026

卷号：670

外文期刊名：JOURNAL OF POWER SOURCES

收录：;EI(收录号：20261420407061);WOS:【SCI-EXPANDED(收录号:WOS:001686381000001)】；

基金：This research is supported by the National Key R & D Program of China (2024YFC3712400) , China Postdoctoral Science Foundation (Grant Number: 2023TQ0170, 2024M751668) .

语种：英文

外文关键词：Proton exchange membrane fuel cell; Two phase flow; Flooding; Voltage instability; Mass transfer

摘要：Two phase flow in channel is a critical factor influencing the performance of high-power density proton exchange membrane fuel cells. However, in-depth numerical studies that incorporate detailed two-phase flow characteristics within channel, particularly under flooding conditions, remain scarce. This study establishes a twodimensional multiphase model that couples the evolution of gas-liquid interfaces in channel with multiphysical processes including mass transport and electrochemical reactions, validated in detail against visualization experimental data. The results demonstrate that water flooding in channel can induce voltage instability, a process that evolves through three distinct stages: localized oxygen depletion, localized low reaction rate, and eventual voltage instability. For specific flow channels, there is a threshold for drainage capacity, exceeding which can lead to extensive coverage of the gas diffusion layer (GDL) surface and induce voltage instability. Reducing the channel height and decreasing the pore size at the GDL-channel interface are shown to mitigate liquid water accumulation and lower the risk of flooding. This work establishes a theoretical foundation for understanding voltage instability triggered by water flooding in flow channel.