文献类型：期刊文献

英文题名：Catalyst layer design with inhomogeneous distribution of platinum and ionomer optimal for proton exchange membrane fuel cell cold-start

作者：Yang, Liu[1];Fu, Kaihao[1];Jin, Xisheng[1];Wang, Shiyao[1];Gan, Quanquan[2,3];Zhang, Qi[1];Li, Ping[1];Cao, Chenxi[4,5]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]Tsinghua Univ, State Key Lab Automot Safety & Energy, Beijing 100084, Peoples R China;[3]Shanghai Shen Li High Tech Co Ltd, Ind Dev Zone, Yuandong Rd, Shanghai 201401, Peoples R China;[4]East China Univ Sci & Technol, Key Lab Smart Mfg Energy Chem Proc, Minist Educ, Shanghai 200237, Peoples R China;[5]East China Univ Sci & Technol, Minist Educ, Engn Res Ctr Proc Syst Engn, Shanghai, Peoples R China

年份：2022

卷号：263

外文期刊名：CHEMICAL ENGINEERING SCIENCE

收录：;EI(收录号：20224012835693);WOS:【SCI-EXPANDED(收录号:WOS:000869126500002)】；

基金：This work is supported by the National Natural Science Foundation of China (Basic Science Center Program: 61988101) , National Natural Science Fund for Distinguished Young Scholars (61725301) , National Natural Science Foundation of China (62173147) , the Fundamental Research Funds for the Central Universities and Shanghai AI Lab. We gratefully acknowledge the assistance of Dr. Bing Wang for access to the computing facilities at the Key Laboratory of Smart Manufacturing in Energy Chemical Process, Ministry of Education.

语种：英文

外文关键词：Proton exchange membrane fuel cell; Mathematical modeling; Cold start; Catalyst layer; Inhomogeneous distribution; Platinum and ionomer loading

摘要：Performance of proton exchange membrane fuel cells under subfreezing environments is restrained by the properties of electrode materials, for instance, the platinum and ionomer loadings. Herein, we pro-pose an optimization strategy for the cold-start performance based on comprehensive multiphysics sim-ulation, employing a functional inhomogeneous cathode catalyst layer (CL) with appropriate platinum and ionomer loading gradients. Numerical analysis reveals the interaction modes between spatial evolu-tion of ice deposition and local species transport in CLs during cold start. As a result, increased loadings towards the membrane side of the CL and near the cathode outlet improve the cold-start performance by promoting the ice uniformity and uplifting the critical ice fractions at the failure time. A practically rel-evant, multilayer graded cathode CL has been optimally designed, which proves to significantly expand the feasible operation domains of cold start while benefiting the nominal working cell performance com-pared with homogeneous CLs.(c) 2022 Elsevier Ltd. All rights reserved.