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题名: Application of hyperdispersant to the cathode diffusion layer for direct methanol fuel cell
作者: Mao, Qing1, 2;  Sun, Gongquan1;  Wang, Suli1;  Sun, Hai1;  Tian, Yang1, 2;  Tian, Juan1, 2;  Xin, Oin1
通讯作者: 孙公权
关键词: polytetrafluoroethylene ;  hyperdispersant ;  agglomeration behavior ;  gas diffusion layer ;  water management ;  direct methanol fuel cell
刊名: JOURNAL OF POWER SOURCES
发表日期: 2008-01-10
DOI: 10.1016/j.jpowsour.2007.09.111
卷: 175, 期:2, 页:826-832
收录类别: SCI
文章类型: Article
部门归属: 3
项目归属: 305
产权排名: 1;1
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Electrochemistry ;  Energy & Fuels
研究领域[WOS]: Electrochemistry ;  Energy & Fuels
英文摘要: In this study, Nation ionomer, as a kind of hyperdispersant, was added to poly tetrafluoroethylene (PTFE) water dispersion system to suppress the size of PTFE particles in the ink of microporous layer (MPL). The agglomeration behavior of PTFE in ethanol and MPL were investigated by laser diffraction, dynamic light scattering (DLS) and metallurgical microscopes. The electronic resistance, pore size distribution, gas permeability and surface hydrophobic/hydrophilic properties were also characterized for prepared gas diffusion layers (GDLs). It was shown that PTFE water dispersion system suffered flocculating when dispersed in ethanol and this agglomeration behavior was reduced by employing Nafion ionomer. With the increase in the Nafion ionomer adopted in the MPL, not only the decreased hydrophobic property was shown in the MPL, but the decreased PTFE particle size was also achieved, which results in improved crosslink of carbon and pores themselves as well as the volume loss of pores in micron scale. The increased gas permeability and electronic conductivity of the GDL made the one employing the PTFE dispersion system with 1% Nation content own its advantages as the cathode diffusion layer for a direct methanol fuel cell (DMFC) under near-ambient conditions. (C) 2007 Elsevier B.V. All rights reserved.
关键词[WOS]: PERFORMANCE ;  ELECTRODES ;  PEMFC ;  WATER ;  TRANSPORT ;  MEMBRANES
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000252634300016
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/100877
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.Dalian Inst Chem Phys, Direct Alcohol Fuel Cell Lab, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China

Recommended Citation:
Mao, Qing,Sun, Gongquan,Wang, Suli,et al. Application of hyperdispersant to the cathode diffusion layer for direct methanol fuel cell[J]. JOURNAL OF POWER SOURCES,2008,175(2):826-832.
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