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学科主题: 物理化学
题名: A novel cathode structure with double catalyst layers and low Pt loading for proton exchange membrane fuel cells
作者: Qiu, Yanling1;  Zhang, Huamin1;  Zhong, Hexiang1;  Zhang, Fengxiang1
通讯作者: 张华民 ;  钟和香
关键词: Cathode structure ;  Double catalyst layers ;  Pt utilization ;  Water flooding problem ;  Synergistic effect ;  Polymer electrolyte membrane fuel cells (PEMFCs)
刊名: INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
发表日期: 2013-05-10
DOI: 10.1016/j.ijhydene.2013.02.118
卷: 38, 期:14, 页:5836-5844
收录类别: SCI
合作性质: 
文章类型: Article
部门归属: DNL17
项目归属: DNL17
产权排名: 待补充
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Physical ;  Electrochemistry ;  Energy & Fuels
资助者: 1,1
研究领域[WOS]: Chemistry ;  Electrochemistry ;  Energy & Fuels
英文摘要: A novel cathode structure (NCS) was developed, which consisted of an inner and an outer catalyst layer (CL). It showed an improved platinum (Pt) utilization (above 50%), a lowered CL/gas diffusion layer interfacial resistance, and a decreased mass transport polarization compared with the traditional cathode structure (TCS). A hydrogen/air proton exchange membrane fuel cell employing NCS yielded an output power density up to 0.76 W cm(-2) with cathode Pt loading as low as 0.28 mg cm(-2). The enhanced performance of NCS is attributed to synergistic effect of the two catalyst supports in outer CL, which provides abundant pores to relieve water flooding and facilitates heat-induced proton conductor migration from the inner to outer CL, forming a hydrophilic proton conduction network. Moreover, the thin and compact inner CL can meet the demand of rich active sites and catalyst migration toward the regions nearest to the membrane under high current densities. Copyright (C) 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
关键词[WOS]: THIN-FILM ;  PEMFC ELECTRODES ;  PERFORMANCE ;  PLATINUM ;  FABRICATION ;  DEPOSITION ;  DIAGNOSIS ;  IMPEDANCE ;  IONOMERS ;  SURFACE
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000319232500037
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/119250
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, Div Energy Storage, Dalian 116023, Peoples R China

Recommended Citation:
Qiu, Yanling,Zhang, Huamin,Zhong, Hexiang,et al. A novel cathode structure with double catalyst layers and low Pt loading for proton exchange membrane fuel cells[J]. INTERNATIONAL JOURNAL OF HYDROGEN ENERGY,2013,38(14):5836-5844.
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