Results 141 to 150 of about 14,368 (203)
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State of Understanding of Nafion
Chemical Reviews, 2004AbstractFor Abstract see ChemInform Abstract in Full Text.
Robert B Moore
exaly +3 more sources
Wettability of Nafion and Nafion/Vulcan Carbon Composite Films
Langmuir, 2012The wettability of the Pt/carbon/Nafion catalyst layer in proton exchange membrane fuel cells is critical to their performance and durability, especially the cathode, as water is needed for the transport of protons to the active sites and is also involved in deleterious Pt nanoparticle dissolution and carbon corrosion. Therefore, the focus of this work
Xiaoan, Li +5 more
openaire +2 more sources
Journal of Power Sources, 2004
Abstract The laminated composite polymer electrolyte membrane is prepared as a sandwich structure, i.e., Nafion–Nafion/polyvinylene difluoride (PVdF)–Nafion. The conductivity of the laminated membrane is 1.1×10−2 S cm−1. The middle layer of PVdF/Nafion successfully blocks methanol cross-over. In tests in a direct methanol fuel cell (DMFC), all of the
Hyun Jae Kim +3 more
openaire +1 more source
Abstract The laminated composite polymer electrolyte membrane is prepared as a sandwich structure, i.e., Nafion–Nafion/polyvinylene difluoride (PVdF)–Nafion. The conductivity of the laminated membrane is 1.1×10−2 S cm−1. The middle layer of PVdF/Nafion successfully blocks methanol cross-over. In tests in a direct methanol fuel cell (DMFC), all of the
Hyun Jae Kim +3 more
openaire +1 more source
Ion Exchange Capacity of Nafion and Nafion Composites
Langmuir, 2000The ion exchange capacity of recast Nafion films and composites of Nafion and polystyrene microbeads is determined by titration. Composite formation enhances exchange capacity; exchange capacity increases with the surface area of microbeads in the composite.
Ta-Yung Chen, Johna Leddy
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Journal of Membrane Science, 2009
The membrane durability is a critical issue for the development of Proton Exchange Membrane Fuel Cells (PEMFC). Since PEMFC in situ tests were not conclusive to determine Nafion (R) membrane degradation mechanism, ex situ aging tests were performed on Nafion (R) 112 in practical fuel cell usage conditions.
Collette, F. M. +3 more
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The membrane durability is a critical issue for the development of Proton Exchange Membrane Fuel Cells (PEMFC). Since PEMFC in situ tests were not conclusive to determine Nafion (R) membrane degradation mechanism, ex situ aging tests were performed on Nafion (R) 112 in practical fuel cell usage conditions.
Collette, F. M. +3 more
openaire +2 more sources
Novel multilayer Nafion/SPI/Nafion composite membrane for PEMFCs
Journal of Power Sources, 2007A novel multilayer membrane for the proton exchange membrane fuel cell (PEMFC) was developed. Nafion was dispersed uniformly onto both sides of the sulfonated polyimide (SPI) membrane. The Nafion/SPI/Nafion composite membrane was prepared by immersing the SPI into the Nafion-containing casting solution.
L. Wang +6 more
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Rapid Proton Transmission through Nafion | Graphene | ALD Alumina | Nafion Membranes
ECS Meeting Abstracts, 2020Recent reports from several laboratories indicate that proton transmission through graphene and other 2D materials in contact with proton-conducting electrolytes can occur rapidly with a much lower activation energy than expected from a wide range of computational studies on the proton / graphene interaction energy, and a much higher selectivity ...
Saheed Bukola +3 more
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ECS Transactions, 2009
A new type of proton conducting fuel cell membrane has been fabricated and evaluated via preliminary physical property determinations. The membrane is composed of a 3-D interconnected network of Nafion (perfluorosulfonic acid) nanofibers that have been embedded in an uncharged and inert polymer matrix.
Kyung Min Lee +4 more
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A new type of proton conducting fuel cell membrane has been fabricated and evaluated via preliminary physical property determinations. The membrane is composed of a 3-D interconnected network of Nafion (perfluorosulfonic acid) nanofibers that have been embedded in an uncharged and inert polymer matrix.
Kyung Min Lee +4 more
openaire +1 more source
Journal of Membrane Science, 2016
Abstract By varying the amount of porogene ( ortho -dichlorobenzene, ODB), and optimization of the dispersion process, two types of solvent cast Nafion membranes with an equivalent weight of 1100 g/mol sulfonic acid can be obtained reproducibly. One type is a dense membrane with a porous layer on one surface.
Dickson Joseph +8 more
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Abstract By varying the amount of porogene ( ortho -dichlorobenzene, ODB), and optimization of the dispersion process, two types of solvent cast Nafion membranes with an equivalent weight of 1100 g/mol sulfonic acid can be obtained reproducibly. One type is a dense membrane with a porous layer on one surface.
Dickson Joseph +8 more
openaire +1 more source