New proton-conducting polydiimidazopyridine based membrane for ht-pem fuel cell

Polydiimidazopyridine was synthesized from 2,3,5,6-tetraaminopyridine and 2,5-dihydroxyterephtalatic acid in polyphosphoric acid and characterized. Polydiimidazopyridine possesses high viscosity, high thermal oxidation resistance and excellent film-forming properties. The polymer was processed from reaction mixture in polyphosphoric acid into proton conducting membranes. The membranes possess higher proton conductivity than for many known membranes at 20-200 °C.

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Inorganic Proton Conducting Membranes for High-Temperature PEM Fuel Cell: Concept, Synthesis and Performance

ECS Meeting Abstracts ◽

10.1149/ma2008-02/11/863 ◽

2008 ◽

Keyword(s):

High Temperature ◽

Fuel Cell ◽

Pem Fuel Cell ◽

Proton Conducting ◽

And Performance ◽

Conducting Membranes ◽

High Temperature Pem

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Proton Conducting Membranes for the High Temperature-Polymer Electrolyte Membrane-Fuel Cell (HT-PEMFC) Based on Functionalized Polysiloxanes

Fuel Cells ◽

10.1002/fuce.200500226 ◽

2007 ◽

Vol 7 (1) ◽

pp. 40-46 ◽

Cited By ~ 20

Author(s):

M. Jeske ◽

C. Soltmann ◽

C. Ellenberg ◽

M. Wilhelm ◽

D. Koch ◽

...

Keyword(s):

High Temperature ◽

Fuel Cell ◽

Polymer Electrolyte ◽

Polymer Electrolyte Membrane ◽

Proton Conducting ◽

Electrolyte Membrane ◽

Conducting Membranes

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Hybrid Proton-Conducting Membranes as Fuel Cells Solid Polyelectrolytes

Journal of Fuel Cell Science and Technology ◽

10.1115/1.2211636 ◽

2005 ◽

Vol 3 (3) ◽

pp. 308-311 ◽

Cited By ~ 2

Author(s):

J. Alberto Blázquez ◽

David Mecerreyes ◽

Oscar Miguel ◽

Javier Rodriguez ◽

Ione Cendoya ◽

...

Keyword(s):

Mechanical Properties ◽

Fuel Cells ◽

Fuel Cell ◽

Phosphotungstic Acid ◽

Ionic Conductivities ◽

Inorganic Membranes ◽

Proton Conducting ◽

Conducting Membranes

A series of novel hybrid organic-inorganic membranes based on sulfonated naphthalimides and phosphotungstic acid N-methylpyrrolidone were prepared from a NMP solution. These materials, composed of two proton-conducting components, have good mechanical properties, high ionic conductivities (10.5×10−2S∕cm at 80°C) and good fuel cell performances at 70°C.

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ELECTRO-OSMOTIC FRACTIONATION OF HYDROGEN ISOTOPES IN ELECTROLYTIC SOLUTIONS USING COMPOSITE PROTON-PERMEABLE MEMBRANES

Visnyk of Taras Shevchenko National University of Kyiv Geology ◽

10.17721/1728-2713.92.02 ◽

2021 ◽

pp. 11-16

Author(s):

O. Pushkar'ov ◽

A. Zubko ◽

I. Sevruk ◽

V. Dolin

Keyword(s):

Hydrogen Bonds ◽

Proton Conductivity ◽

Tritiated Water ◽

High Mobility ◽

Hydrogen Isotopes ◽

Water Molecules ◽

Proton Conducting ◽

Partial Dissociation ◽

Surface Modified ◽

Conducting Membranes

Based on the analysis of the features of electroosmotic processes that are implemented in proton-conducting membranes, the possibility of fractioning hydrogen isotopes in electrolytes formed using tritiated water (HTO) is estimated. The interaction of the solution with the membranes in their channels leads to polarization and partial dissociation of the electrolyte molecules. In water molecules, when protium is replaced by a heavy isotope of hydrogen, the energy of breaking of hydrogen bonds increases and the process of their dissociation proceeds predominantly according to the scheme: HTO ↔ H+ + TO—. A part of the released protons can join water molecules to form the H3O+ ion. H3O+ and TO— ions are more mobile than other singly charged ions. The main characteristic that determines the suitability of electroosmotic membranes to the fractionation of hydrogen isotopes is proton conductivity. The released protons have anomalously high mobility due to their small size, tunnel and relay movement through hydrogen bonds between adjacent polar groups in the channels of the proton-conducting membranes. To ensure high proton conductivity in the pores and channels of the membranes, modifying substances are fixed, which contain the groups: –ОН- , –NH2, –NH, –SH, –COOH, –SO3H, acid salts and oxides, containing surface proton-conducting groups. To create proton-conducting membranes, it is possible to use surface-modified β-alumina (β-Al2O3(H3O+)) and protonated (H3O+) montmorillonite with ionic conductivity (5х103 – 4х104 Ohm х cm–1). The most effective are surface modifiers with negatively charged sulfonic groups. The imposition of an external electric field leads to the movement of ions in the electrolyte, which leads to a redistribution of the isotope ratio in the near-anode and cathode spaces.

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