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Composite Proton‐Conducting Membranes for PEMFCs
Fuel Cells, 2007AbstractComposite membranes are of interest for PEMFCs and DMFCs. This paper describes a basic study of the influence of silica on the proton conductivity: (i) added as a filler to poly(vinylidene fluoride‐hexafluoropropylene) and poly(benzimidazole)‐based membranes activated with H3PO4, or (ii) included in the matrix of class II hybrids based on ...
Mustarelli, P +6 more
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Protonic and Electronic Conduction in Proton Conductive Solid Oxide Fuel Cells
MRS Proceedings, 2011ABSTRACTProtons can fit into the perovskite structure because the O-O distance is approximately that of ice. However, to achieve charge balance, -2e charge must be added for every two protons added. If O2- vacancies are introduced, for instance by doping barium cerate with yttrium to obtain ${\it Ba}^{2 + } {\it Ce}_{1 - {\it x}}^{4 + } {\it Y}_{\it x}^
V. Hugo Schmidt, Chih-Long Tsai
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Proton conduction in some solids and the fuel cell with a proton conducting electrolyte
International Journal of Hydrogen Energy, 1979Abstract The electrical conductivities of some organic and inorganic solids, such as the simple organic acids, NH4H2PO4, KH2PO4, H3BO3, λ-AIOOH, amine-sulfates and amine-phosphates, have been measured. A relatively high proton conductivity of about 1 × 10−3 ohm−1 cm−1 at 87°C was found in hexamethylenetetramine phosphate.
T TAKAHASHI +4 more
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Materials Research Bulletin, 1982
Abstract Protonic conduction in zeolites is optimized. The approach is based on a vehicle-mechanism for the transport process. The parameters controlling protonic conduction are discussed. Fully hydrated “NH4-zeolite A” has a room temperature conductivity of 2×10 −3 Ω −1 cm −1 .
K.D. Kreuer, W. Weppner, A. Rabenau
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Abstract Protonic conduction in zeolites is optimized. The approach is based on a vehicle-mechanism for the transport process. The parameters controlling protonic conduction are discussed. Fully hydrated “NH4-zeolite A” has a room temperature conductivity of 2×10 −3 Ω −1 cm −1 .
K.D. Kreuer, W. Weppner, A. Rabenau
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Angewandte Chemie International Edition, 2012
Parasitic current seems to be the cause for the "highest proton conductivity" of a material reported to date. Kreuer and Wohlfarth verify this hypothesis by measuring the conductivity of the same materials after preparing them in a different way. They further explain the limits of proton conductivity and comment on the problems of determining the ...
Kreuer, K., Wohlfarth, A.
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Parasitic current seems to be the cause for the "highest proton conductivity" of a material reported to date. Kreuer and Wohlfarth verify this hypothesis by measuring the conductivity of the same materials after preparing them in a different way. They further explain the limits of proton conductivity and comment on the problems of determining the ...
Kreuer, K., Wohlfarth, A.
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The Chemical Record, 2020
AbstractProton conductivity has been traditionally investigated with various materials such as organic polymers, metal oxides, and other inorganic and organic compounds because of their potential application in the electrochemical devices. In particular, during the last decade, crystalline porous coordination polymers (PCPs) or metal‐organic frameworks
Daniil I. Kolokolov +2 more
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AbstractProton conductivity has been traditionally investigated with various materials such as organic polymers, metal oxides, and other inorganic and organic compounds because of their potential application in the electrochemical devices. In particular, during the last decade, crystalline porous coordination polymers (PCPs) or metal‐organic frameworks
Daniil I. Kolokolov +2 more
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Hexameric polyoxotantalate with proton conduction properties
Chemical Communications, 2023The 1 has the highest nuclearity transition metal cluster in the POTa field, is major breakthrough in the synthesis of POTa. The polyanion can be described as six {Ta6O19} linked by {Fe10.7Ta1.3} cluster. And 1 has excellent proton conductivity.
Hanhan Chen +5 more
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ACS Applied Materials & Interfaces
Successive proton conduction channels are constructed with the spin coating method in flexible proton exchange membranes (PEMs). In this research, phosphoric acid (PA) molecules are immobilized in the multilayered microstructure of Kevlar nanofibers and polystyrene-block-poly(ethylene-ran-butylene)-block-polystyrene (SEBS) polymer molecular chains.
Qingquan Li +6 more
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Successive proton conduction channels are constructed with the spin coating method in flexible proton exchange membranes (PEMs). In this research, phosphoric acid (PA) molecules are immobilized in the multilayered microstructure of Kevlar nanofibers and polystyrene-block-poly(ethylene-ran-butylene)-block-polystyrene (SEBS) polymer molecular chains.
Qingquan Li +6 more
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Protonic conductivity in hydrates
Solid State Ionics, 1988The protonic conductivity of three acid hydrates, HUO2PO4·4H2O, Ce(HPO4)2·nH2O,V2O5·nH2O has been studied as a function of the partial pressure of water. The evolution of their conductivity is related to experimental water adsorption isotherms and to the theoretical Brunauer adsorption isotherms.
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Protonic conduction in NH4H2PO4
Journal of Solid State Chemistry, 1974Abstract The conductivity of ammonium dihydrogen phosphate has been measured as a function of temperature and dopant concentration. A previously disputed break in the log conductivity vs reciprocal temperature plots has been observed. The activation energy is in agreement with previous work on NH 4 H 2 PO 4 .
Charles T. Perrino, Paul Wentrcek
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