Journal ArticleDOI
Proton-Conducting Glass Electrolyte
Thanganathan Uma,Masayuki Nogami +1 more
TLDR
A new porous glass electrolyte consisting of heteropolyacids, i.e., phosphotungstic acid (PWA) and phosphomolybdic acid, was investigated and was found to yield a remarkably high proton conductivity of 1.014 S cm(-1) at 30 degrees C and 85% relative humidity, the first time such a high Proton Conductivity value has been reported for a heteropolyacid glass membrane.Abstract:
A new porous glass electrolyte consisting of heteropolyacids, i.e., phosphotungstic acid (PWA) and phosphomolybdic acid, was investigated and was found to yield a remarkably high proton conductivity of 1.014 S cm-1 at 30 °C and 85% relative humidity. This is the first time such a high proton conductivity value has been reported for a heteropolyacid glass membrane. The glass was applied as the electrolyte for an H2/O2 fuel cell, and a maximum power density of 41.5 mW/cm2 at 32 °C was attained using this new PWA-containing electrode.read more
Citations
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Journal ArticleDOI
HPW/MCM‐41 Phosphotungstic Acid/Mesoporous Silica Composites as Novel Proton‐Exchange Membranes for Elevated‐Temperature Fuel Cells
TL;DR: Although the conductivity values of mesoporous acid-free silica xerogels, meso-SiO2-C12EO10OHCF3SO3H or anatase thin films are adequate for fuel cell applications, their performance as an electrolyte in a PEMFC has not been evaluated yet.
Journal ArticleDOI
Insight into Proton Transfer in Phosphotungstic Acid Functionalized Mesoporous Silica-Based Proton Exchange Membrane Fuel Cells
TL;DR: It is found that the overall barrier for proton movement within the HPW-meso-silica membranes is determined by the intramolecular proton transfer pathway, which explains why the proton conductivity remains unchanged when the weight percentage of HPW on meso- silica is above 67 wt %.
Journal ArticleDOI
Functionalized mesoporous structured inorganic materials as high temperature proton exchange membranes for fuel cells
TL;DR: In this paper, the development of high temperature PEMFCs is discussed, and the main emphasis is on the developments of unsupported and functionalized nano and mesoporous structured inorganic materials such as TiO2, Fe2O3, Al 2O3 and SiO2 for fuel cells.
Journal ArticleDOI
Phosphonated Hexaphenylbenzene: A Crystalline Proton Conductor
Lucía Jiménez-García,Anke Kaltbeitzel,Wojciech Pisula,Jochen S. Gutmann,Markus Klapper,Klaus Müllen +5 more
TL;DR: Organic crystals of small molecules are suggested as an alternative to common polymeric electrolytes and inorganic crystals employed as PEM in FC systems.
Journal ArticleDOI
A novel inorganic proton exchange membrane based on self-assembled HPW-meso-silica for direct methanol fuel cells
TL;DR: In this paper, a novel inorganic proton exchange membrane based on 12-tungstophosphoric acid mesoporous silica (HPW-meso-silica) nanocomposites was synthesized via a one-step self-assembly route assisted by a triblock copolymer, Pluronic P123, as the structure-directing surfactant.
References
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Journal ArticleDOI
Inorganic Solid Acids and Their Use in Acid-Catalyzed Hydrocarbon Reactions
TL;DR: In this article, the authors tried to describe perhaps the most important solid acids based on inorganic oxides, going from their preparation procedures and characterization, to their catalytic activity for a series of hydrocarbon reactions.
Journal ArticleDOI
Proton Conductivity: Materials and Applications
TL;DR: In this paper, a review of the proton conductivity in materials and the elements of proton conduction mechanisms are discussed with a special emphasis on proton chemistry, including structural reorganization and diffusional motion of extended moieties.
Journal ArticleDOI
Capacitors: operating principles, current market and technical trends
TL;DR: The worldwide market for capacitors was approximately US$ 12.3 billion in 1993, of which production within Japan accounted for approximately 50% and the combined domestic and overseas production of Japanese manufacturers accounted for about 70% as discussed by the authors.
Journal ArticleDOI
Homogeneous catalysts based on heteropoly acids (review)
I.V. Kozhevnikov,K.I. Matveev +1 more
TL;DR: In this paper, a review of recent applications of heteropoly acids (HPA) as homogeneous oxidative and acid catalysts in a variety of practically important reactions has been presented.
Journal ArticleDOI
Synthesis and characterization of proton-conducting materials containing dodecatungstophosphoric and dodecatungstosilic acid supported on silica
TL;DR: In this paper, solid electrolytes formed by different amounts of PWA and silicotungstic acid (SiWA) in silica gel have been prepared and characterized, and XRD, IR and DTA analyses performed on the samples in powder form revealed the existence of an interaction between the heteropoly acids and the support.
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Structural and Transport Properties of Mixed Phosphotungstic Acid/Phosphomolybdic Acid/SiO2 Glass Membranes for H2/O2 Fuel Cells
Thanganathan Uma,Masayuki Nogami +1 more