Journal ArticleDOI
Nafion/PTFE Composite Membranes for Fuel Cell Applications
T. Leon Yu,Hsiu-Li Lin,Kun-Sheng Shen,Li-Ning Huang,Yu-Chen Chang,Guo-Bin Jung,Jerry C. Huang +6 more
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TLDR
In this paper, a comparison of physical properties and fuel cell performance of composite membranes with those of Nafion membranes (DuPont Co) is presented, where the composite membrane has better thermal stability and gas barrier property but worse ionic conductivity than Nafions.Abstract:
The composite membranes were prepared by impregnation of porous poly(tetrafluoroethylene) membranes with a 5 wt% Nafion solution. Scanning electron microscope micrographs of composite membranes show the surface and cross section of poly(tetrafluoroethylene) membranes were covered and filled with Nafion resin. Comparison of physical properties and fuel cell performance of composite membranes with those of Nafion membranes (DuPont Co) is presented. The composite membrane has better thermal stability and gas barrier property but worse ionic conductivity than Nafion membrane. Though the composite membrane has a lower conductivity than Nafion membrane, however, owing to the thinner thickness of composite membrane (in thickness of 20±5 µm) than Nafion-115 (in thickness of 125 µm) and Nafion-117 (in thickness of 175 µm) membranes, the composite membrane has a shorter H+ ion transporting pathway and thus a higher conductance (conductance = conductivity/membrane thickness) than Nafion-115 and Nafion-117 membranes. Thus the composite membrane has a better fuel cell performance than Nafion-117 and Nafion-115 membranes. In this report, we show that our composite membrane has a fuel cell performance similar to Nafion-112 membrane (in thickness of 50 µm).read more
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Journal ArticleDOI
Scientific aspects of polymer electrolyte fuel cell durability and degradation.
Rodney L. Borup,Jeremy P. Meyers,Bryan S. Pivovar,Yu Seung Kim,Rangachary Mukundan,Nancy Garland,Deborah J. Myers,Mahlon S. Wilson,Fernando H. Garzon,David L. Wood,Piotr Zelenay,Karren L. More,Ken Stroh,Thomas A. Zawodzinski,James M. Boncella,James E. McGrath,Minoru Inaba,Kenji Miyatake,Michio Hori,Kenchiro Ota,Zempachi Ogumi,Seizo Miyata,Atsushi Nishikata,Zyun Siroma,Yoshiharu Uchimoto,Kazuaki Yasuda,Ken'ichi Kimijima,Norio Iwashita +27 more
TL;DR: The research focuses on the durability of polymer electrolyte fuel cells (PEFCs), in particular, membrane degradation, and he has been involved in NEDO R&D research projects on PEFC durability since 2001.
Journal ArticleDOI
A review on water balance in the membrane electrode assembly of proton exchange membrane fuel cells
TL;DR: In this article, the authors reviewed experimental investigations and modeling works on water transport and balance in different constituents of the membrane electrode assembly (MEA), which is the most important component determining the performance and durability of a PEMFC.
Journal ArticleDOI
Recent approaches to improve Nafion performance for fuel cell applications: A review
TL;DR: In this article, the authors specify the latest achievements made to improve the Nafion performance by means of pretreatments, incorporation of reinforcing agents, nanocomposites, blending, ionic liquids, and so on.
Journal ArticleDOI
A high performance polytetrafluoroethene/Nafion composite membrane for vanadium redox flow battery application
TL;DR: In this paper, a thin polytetrafluoroethene (PTFE)/Nafion composite membrane for vanadium redox flow battery (VRB) application was prepared by impregnating porous PTFE membrane with Nafion solution.
Journal ArticleDOI
Nafion/PTFE composite membranes for direct methanol fuel cell applications
TL;DR: Using dynamic light scattering and scanning electron microscope (SEM), it was shown that a high carbon-number alcohol/water, mixed solvent is more effective than low-carbon-number mixed solvents in dispersing Nafion molecules as mentioned in this paper.
References
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Book
Fuel cell systems explained
James Larminie,Andrew Dicks +1 more
TL;DR: In this paper, the first edition of this paper, the authors presented an analysis of fuel cell systems and their performance in terms of Molar Gibbs Free Energy Calculations (GFE) and Open Circuit Voltage.
Book
Fuel cells and their applications
TL;DR: The importance of fuel cells for energy saving is explained and evaluated and the extremely low pollution characteristics of dispersed fuel cells are emphasised in this article, where their wide-ranging applications in homes, small factories and power plants, and in some industries for the highly efficient conversion of waste and biomass materials, with the general effect of carbon dioxide reduction in all fossil-fuel-burning processes, are discussed.
Journal ArticleDOI
Chemical and morphological properties of solution-cast perfluorosulfonate ionomers
Journal ArticleDOI
Nafion/PTFE composite membranes for fuel cell applications
TL;DR: In this article, the authors used three kinds of porous PTFE films to prepare Nafion/PTFE composite membranes of different thickness and showed that the porosity of the substrate polytetrafluoroethylene films, the better the fuel cell performance.