Polymeric organic–inorganic proton-exchange membranes for fuel cells produced by the sol–gel method

Shevchenko, V. V.; Stryutskii, A. V.; Klimenko, N. S.

doi:10.1007/s11237-011-9187-9

Cited by 14 publications

(4 citation statements)

References 117 publications

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“…3 shows the unmodified membrane with an ion exchange capacity of 0.088 meq/g attributed to the low hydrophobicity of n-butyl acrylate/styrene, which prevents the utilization of the hydrogen bonds that continuously break and form between the water molecules and the polymer to mobilize the positive ions through the membrane [11]. The absorption of water and the electrochemical characteristics of the membrane strongly depend on the composition and the nature of the distribution of the charge in the matrix, therefore the ion exchange capacity was improved by 45.2% compared to the unmodified membrane by the addition of ferric oxide, allowing a greater retention of water, which favors the proton transport through the Grotthus mechanism and the vehicle mechanism [12]. Table 1 shows a slight decrease in the stress and maximum deformation properties for the loaded membrane because the hygroscopicity of ferric oxide affects its response to stretching, making it more fragile since the water absorbed acts as a plasticizer [13,14].…”

Section: Characterization Of the Membranesmentioning

confidence: 99%

Synthesis of a proton exchange membrane from n-butyl acrylate/styrene modified with Fe2O3 for fuel cells

Jiménez¹,

Carbal²,

Marin³

2018

ces

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In the present work, proton exchange membranes are obtained from n-butyl acrylate/styrene copolymer modified with ferric oxide (Fe2O3) for its use in fuel cells. The physicochemical and mechanical properties of each membrane were characterized. The addition of Fe2O3 increased water retention, ion exchange capacity and Young's modulus due to the hydrophilic character contributed to the ferric oxide which through the formation of hydrogen bonds allowed an adequate interaction between the load and the polymeric matrix. The modification of the copolymer was identified through the FTIR analysis. The synthesized membranes have potential as an electrolyte in the fuel cell, however it is necessary improve its mechanical properties.

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Section: Characterization Of the Membranesmentioning

confidence: 99%

Synthesis of a proton exchange membrane from n-butyl acrylate/styrene modified with Fe2O3 for fuel cells

Jiménez¹,

Carbal²,

Marin³

2018

ces

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“…Las membranas cargadas y sulfonadas-cargadas presentan los valores más altos de capacidad iónica, debido al potencial de oxidación fuerte de TiO2, el cual oxida las moléculas de agua asociadas a la misma, dando lugar a la formación de grupos Ti-OH en la superficie de las partículas. Estos grupos OH adicionales promueven la adsorción de agua, lo que conduce a un aumento en la cantidad de agua adsorbida, y también en el número de sitios de intercambio de iones en las membranas de material compuesto, mejorando la capacidad iónica (Shevchenko et al, 2011;Realpe et al, 2014;Realpe et al, 2015). La membrana sulfonada también registró un aumento en la capacidad de intercambio iónico, en comparación con la membrana sin modificar.…”

Section: Determinación De La Capacidad Iónica De Las Membranasunclassified

Síntesis y Caracterización Fisicoquímica de una Membrana Cargada con TiO2 Preparada a Partir de la Sulfonación de un Copolímero de Éster Acrílico y Estireno

et al. 2015

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ResumenMembranas de intercambio protónico fueron preparadas a partir de un copolimero de éster acrílico y estireno, y sus propiedades fisicoquímicas fueron investigadas para aplicación en celdas de combustible. Las propiedades de la membrana fueron modificadas a partir de la reacción de sulfonación y adición de dióxido de titanio (TiO2). Caracterización fisicoquímica de retención de agua, capacidad de intercambio iónico y análisis térmico fueron realizadas a las membranas preparadas. La membrana sulfonada-cargada (SC) presentó capacidad de intercambio iónico de 0.27 meq/g, retención de agua de 25.8% y resistencia a la tracción de 4.63 MPa. Estos resultados confirman que la introducción de grupos sulfónicos y adicción de TiO2 mejoran las propiedades fisicoquímicas of la membrana sin modificar, indicando que las membranas preparadas tienen potencial para aplicaciones de intercambio protónico en celdas de combustible. Palabras clave: copolímero de éster acrílico -estireno, membrana polimérica, intercambio protónico Synthesis and Physicochemical Characterization of a Membrane Loaded with TiO2 Prepared from sulfonation of a Copolymer of Acrylic Ester and Styrene AbstractProton exchange membranes were prepared from a copolymer of acrylic ester and styrene, and their physicochemical properties were investigated for application in fuel cells. The properties of the membrane were modified from the sulfonation reaction and addition of titanium dioxide (TiO2). Physicochemical characterization of water uptake, ion exchange capacity and thermal analysis were carried out to the membranes prepared. The sulfonated-loaded membrane (SC) presented ion exchange capacity of 0.27 meq/g, water uptake of 25.8% and tensile strength of 4.63 MPa. These results confirm that the introduction of sulfonic groups and TiO2 addiction improve the physiochemical properties of the unmodified membrane, indicating that the prepared membranes have potential for applications in proton exchange fuel cells.

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“…In addition, PIL-based systems will be much cheaper, as compared with acid-based systems, due to the unique properties of PILs. Besides, PILs can also protect metallic components, i.e., the piping and bipolar plates, from corrosion [14][15][16][17][18][19][20]. In the present work different polymerizable ILs were synthesized and characterized in terms of their conductivity value.…”

Section: Introductionmentioning

confidence: 99%

“…The H 3 PO 4 doping of these polymers is one of the easiest and most often-used approaches to design proton-conductive membranes. H 3 PO 4 exhibits characteristics of both a protondonor (due to the formation of H 2 PO 4 − /H 4 PO 4 + ion pairs) and a proton-conducting medium [14]. The main disadvantages of such membranes are the loss of the membrane's mechanical stability, the acid release during fuel-cell operation, and acid adsorption onto the surface of the Pt catalyst, which hampers the reaction kinetics [15].…”

Section: Introductionmentioning

confidence: 99%

Novel Ionic Conducting Composite Membrane Based on Polymerizable Ionic Liquids

et al. 2021

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In this work, the design and characterization of new supported ionic liquid membranes, as medium-temperature polymer electrolyte membranes for fuel-cell application, are described. These membranes were elaborated by the impregnation of porous polyimide Matrimid® with different synthesized protic ionic liquids containing polymerizable vinyl, allyl, or methacrylate groups. The ionic liquid polymerization was optimized in terms of the nature of the used (photo)initiator, its quantity, and reaction duration. The mechanical and thermal properties, as well as the proton conductivities of the supported ionic liquid membranes were analyzed in dynamic and static modes, as a function of the chemical structure of the protic ionic liquid. The obtained membranes were found to be flexible with Young’s modulus and elongation at break values were equal to 1371 MPa and 271%, respectively. Besides, these membranes exhibited high thermal stability with initial decomposition temperatures > 300 °C. In addition, the resulting supported membranes possessed good proton conductivity over a wide temperature range (from 30 to 150 °C). For example, the three-component Matrimid®/vinylimidazolium/polyvinylimidazolium trifluoromethane sulfonate membrane showed the highest proton conductivity—~5 × 10−2 mS/cm and ~0.1 mS/cm at 100 °C and 150 °C, respectively. This result makes the obtained membranes attractive for medium-temperature fuel-cell application.

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Polymeric organic–inorganic proton-exchange membranes for fuel cells produced by the sol–gel method

Cited by 14 publications

References 117 publications

Synthesis of a proton exchange membrane from n-butyl acrylate/styrene modified with Fe2O3 for fuel cells

Synthesis of a proton exchange membrane from n-butyl acrylate/styrene modified with Fe2O3 for fuel cells

Síntesis y Caracterización Fisicoquímica de una Membrana Cargada con TiO2 Preparada a Partir de la Sulfonación de un Copolímero de Éster Acrílico y Estireno

Novel Ionic Conducting Composite Membrane Based on Polymerizable Ionic Liquids

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