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题名: Application of FTIR in direct methanol fuel cells - Quantitative analysis of PTFE in gas diffusion layers
作者: Jing, Mingyi1, 2;  Jiang, Luhua1;  Wang, Suli1;  Jing, Fenning1;  Sun, Gongquan1
关键词: FTIR ;  Diffusion reflection ;  ATR ;  Gas diffusion layers ;  PTFE
刊名: INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
发表日期: 2013-06-27
DOI: 10.1016/j.ijhydene.2013.04.071
卷: 38, 期:19, 页:7957-7963
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Physical ;  Electrochemistry ;  Energy & Fuels
研究领域[WOS]: Chemistry ;  Electrochemistry ;  Energy & Fuels
英文摘要: Gas diffusion layers (GDLs) of direct methanol fuel cells (DMFCs), consisting of a microporous layer (MPL) and a back layer (BL), influence the cell performance and stability significantly due to the critical function that the GDL undertook, i.e., distribution of reactants and removal of the products in electrodes. The hydrophilic/hydrophobic properties of the GDLs are required to tailor to the transport/transfer of reactants/products depending on a specific electrode reaction. One important way to adjust the hydrophobic/hydrophilic properties of GDLs is to vary PTFE content in GDLs. In this paper, we employ infrared spectroscopy technique, specifically, diffuse reflection (DR) method and attenuation total reflection (ATR) method, to determine the PTFE content in both MPLs and BLs quantitatively by comparing the measured C-F intensity with the pre-calibrated standard plots. Compared to the ATR method, the DR method takes advantages of sensitivity, wide range and precision. By the DR method, we succeed in observing that PTFE in MPLs migrates to BLs, consistent with the corresponding EDX results for a sample experienced 600 h lifetime test, suggesting DR method an effective approach to determine quantitatively the hydrophilic/hydrophobic properties of both MPLs and BLs. Crown Copyright (c) 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
关键词[WOS]: WATER TRANSPORT ;  PERFORMANCE ;  CATHODE ;  DURABILITY ;  ELECTRODES
语种: 英语
WOS记录号: WOS:000321407500024
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/137854
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, Dalian Natl Lab Clean Energy, Div Fuel Cell & Battery, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100039, Peoples R China

Recommended Citation:
Jing, Mingyi,Jiang, Luhua,Wang, Suli,et al. Application of FTIR in direct methanol fuel cells - Quantitative analysis of PTFE in gas diffusion layers[J]. INTERNATIONAL JOURNAL OF HYDROGEN ENERGY,2013,38(19):7957-7963.
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