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An ultrathin self-humidifying membrane for PEM fuel cell application: Fabrication, characterization, and experimental analysis
Zhu, Xiaobing; Zhang, Huamin; Zhang, Yu; Liang, Yongmin; Wang, Xiaoli; Yi, Baolian
刊名JOURNAL OF PHYSICAL CHEMISTRY B
2006-07-27
DOI10.1021/jp061955s
110期:29页:14240-14248
收录类别SCI
文章类型Article
WOS标题词Science & Technology ; Physical Sciences
类目[WOS]Chemistry, Physical
研究领域[WOS]Chemistry
关键词[WOS]POLYMER ELECTROLYTE MEMBRANES ; ION-EXCHANGE MEMBRANES ; COMPOSITE MEMBRANES ; MATHEMATICAL-MODEL ; PROTON TRANSPORT ; WATER TRANSPORT ; GAS-CROSSOVER ; NAFION ; HUMIDIFICATION ; TEMPERATURE
英文摘要An ultrathin poly( tetrafluoroethylene) ( PTFE)-reinforced multilayer self- humidifying composite membrane ( 20 mu m, thick) is developed. The membrane is composed of Nafion-impregnated porous PTFE composite as the central layer, and SiO2 supported nanosized Pt particles (Pt-SiO2) imbedded into the Nafion as the two side layers. The proton exchange membrane (PEM) fuel cell employing the self- humidifying membrane (Pt-SiO2/ NP) turns out a peak power density of 1.40 W cm(-2) and an open circuit voltage (OCV) of 1.032 V under dry H-2/O-2 condition. The excellent performance is attributed to the combined result of both the accelerated water back-diffusion in the thin membrane and the adsorbing/releasing water properties of the Pt-SiO2 catalyst in the side layers. Moreover, the inclusion of the hygroscopic Pt-SiO2 catalyst inside the membrane results in an enhanced anode self- humidification capability and also the decreased cathode polarization ( accordingly an improved cell OCV). Several techniques, such as transmission electronic microscopy, scanning electronic microscopy, energy dispersive spectroscopy, thermal analysis and electrochemical impedance spectroscopy etc., are employed to characterize the Pt-SiO2/ NP membrane. The results are discussed in comparison with the plain Nafion/PTFE membrane (NP). It is established that the reverse net water drag ( from the cathode to the anode) across the Pt-SiO2/NP membrane reaches 0.16 H2O/H+. This implies a good hydration of the Pt-SiO2/NP membrane and thus ensures an excellent PEM fuel cell performance under self- humidification operation.
语种英语
WOS记录号WOS:000239141800039
引用统计
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/139985
专题中国科学院大连化学物理研究所
作者单位1.Chinese Acad Sci, Dalian Inst Chem Phys, Proton Exchange Membrane Fuel Cell Key Mat & Tech, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
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Zhu, Xiaobing,Zhang, Huamin,Zhang, Yu,et al. An ultrathin self-humidifying membrane for PEM fuel cell application: Fabrication, characterization, and experimental analysis[J]. JOURNAL OF PHYSICAL CHEMISTRY B,2006,110(29):14240-14248.
APA Zhu, Xiaobing,Zhang, Huamin,Zhang, Yu,Liang, Yongmin,Wang, Xiaoli,&Yi, Baolian.(2006).An ultrathin self-humidifying membrane for PEM fuel cell application: Fabrication, characterization, and experimental analysis.JOURNAL OF PHYSICAL CHEMISTRY B,110(29),14240-14248.
MLA Zhu, Xiaobing,et al."An ultrathin self-humidifying membrane for PEM fuel cell application: Fabrication, characterization, and experimental analysis".JOURNAL OF PHYSICAL CHEMISTRY B 110.29(2006):14240-14248.
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