文献类型：会议论文

英文题名：A Pt content and pore structure gradient distributed catalyst layer to improve the PEMFC performance

作者：Ye, Licheng[1,3];Gao, Yuan[1,2];Zhu, Shiyao[1,3];Zheng, Junsheng[1,2];Li, Ping[3];Zheng, Jim P.[1,2,4]

机构：[1]Tongji Univ, Clean Energy Automot Engn Ctr, 4800 Caoan Rd, Shanghai 201804, Peoples R China;[2]Tongji Univ, Sch Automot Studies, 4800 Caoan Rd, Shanghai 201804, Peoples R China;[3]East China Univ Sci & Technol, State Key Lab Chem Engn, UNILAB, Shanghai 200237, Peoples R China;[4]Florida State Univ, Florida A&M Univ, Coll Engn, Dept Elect & Comp Engn, Tallahassee, FL 32310 USA

会议论文集：International Conference on Innovative Electrochemical Energy Materials and Technologies (EEMT)

会议日期：NOV 08-11, 2015

会议地点：Nanjing, PEOPLES R CHINA

语种：英文

外文关键词：Catalyst layer; Pt gradient distribution; Pore structure gradient distribution; PEMFC

摘要：The catalyst layer is a key component in the proton exchange membrane fuel cell (PEMFC) for it is where the conversion of fuel into electricity takes place. Traditionally, electrocatalyst is uniformly distributed in the catalyst layers of the membrane electrode assembly (MEA) and the high Pt consumption in catalyst layers blocks the widely use of PEMFC. Here we proposed a Pt content and pore structure gradient distributed, two-layer catalyst layer for PEMFC to improve the MEA performance. Energy-dispersive X-ray (EDX) spectroscopy results show Pt nanoparticles gradient distributed on the vertical direction of catalyst layer. The pore size in the Pt poor layer is larger than that in the Pt rich layer, and this structure can improve the Pt utilization and enhance the mass transfer in the catalyst layer. The single cell test result shows this new MEA has a better performance (11%) than the traditional MEA. (C) 2016 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.