Investigation of the effects of AMPS-modified nanoclay on fuel cell performance of sulfonated aromatic proton exchange membranes

Fallahi-Samberan, Mehrab; Hasani-Sadrabadi, Mohammad Mahdi; Ghaffarian, Seyed Reza; Alimadadi, Atefeh

doi:10.1016/j.ijhydene.2013.08.111

Cited by 25 publications

(8 citation statements)

References 31 publications

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“…La interacción sulfonación-carga disminuye ligeramente la retención de agua con el aumento en el por-centaje carga, esto puede ser producto del confinamiento que presentan las nanopartículas de TiO 2 (18 ± 6 nm) dentro de la resina, acompañado de los grupos sulfónicos adheridos a la cadena, lo que provoca una reducción del volumen libre que permite la captación de agua (Samberan et al, 2013). Resultados similares se muestran por Devrim et al (2009), quienes reportan una reducción en la retención de agua al sulfonar y cargar con TiO 2 una muestra de polisulfona, en comparación con los valores obtenidos para este mismo material solo sulfonado, bajo las mismas condiciones de sulfonación.…”

Section: Resultados Y Discusiónunclassified

“…Para el caso de las membranas solo cargadas a 1 y 4% en peso de nanopartículas de TiO 2 los valores de IEC son bajos (0.1 y 0.18 meq/g, respectivamente) a pesar de presentar una alta captación de agua, esto se debe a la reducción del volumen libre dentro de la estructura, lo que dificulta el paso de los protones. El IEC aumenta con el tiempo de sulfonación y carga, como consecuencia de la presencia de los grupos sulfónicos que incrementan la densidad de grupos iónicos cargados negativamente por volumen de las membranas, lo que provoca valores más altos de IEC (0.39 meq/g para la membrana sulfonada 8h y cargada 4%) (Samberan et al, 2013). Resultados similares se presentaron por Méndez y Toscano (2013) para las mismas condiciones de sulfonación del material y un tiempo de 3h con un valor de 0.24 meq/g y 0.27 meq/g para las membranas sulfonadas cargadas solo con TiO 2 .…”

Section: Resultados Y Discusiónunclassified

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Efecto de la sulfonación del estireno-éster acrílico sobre las propiedades de las membranas de intercambio protónico

Jiménez

Maza-Puerta

Acevedo-Morantes

et al. 2016

Ingeniería, Investigación y Tecnología

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In this work was studied the effect of sulfonation of styrene-acrylic ester and of titanium dioxide nanoparticles on the proton exchange membranes. It was evaluated the physicochemical characterization of membranes, such as, the water uptake capacity, ion exchange capacity, the mechanic properties of stress/strain, and the chemical functional groups present in the membrane structure by FTIR analysis. Water uptake increases with increasing the time of sulfonation reaction, reaching 60.9% after 8 hours of sulfonation; while, ion exchange capacity of loaded-sulfonated membrane increases with increasing the time of sulfonation reaction and with increasing the TiO 2 load, reaching 0.39 meq/g for 8 hours and 4% TiO 2. It was observed that the elasticity of the synthesized membranes increases with increasing the time of sulfonation reaction, and it decreases with the addition of the TiO 2 load. This physicochemical property set allows to consider the membrane with high potential of application in the fuel cells area.

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Section: Resultados Y Discusiónunclassified

Efecto de la sulfonación del estireno-éster acrílico sobre las propiedades de las membranas de intercambio protónico

Jiménez

Maza-Puerta

Acevedo-Morantes

et al. 2016

Ingeniería, Investigación y Tecnología

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“…This structure has shown a higher proton conductivity than the normal films prepared from the same polymer due to the proton path formed in the interior in the fibers. On the other hand, studies about composite membranes based on solid inorganic proton conducting materials and the organic polymer matrix or prepared acid–base blends and their composite also were introduced to improve their water retention properties . These studies have shown excellent performance as alternative PEMs and would be good candidates to replace Nafion.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of proton conductivity of sulfonated polyimide/dihydroxy naphthalene charge-transfer complex hybrid membranes

Christiani

Hilaire

Sasaki

et al. 2014

J. Polym. Sci. Part A: Polym. Chem.

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Sulfonated polyimide (SPI)/dihydroxynaphthalene (DHN) charge‐transfer (CT) complex hybrid films were investigated as possible alternative for polymer electrolyte membranes in polymer electrolyte fuel cells. SPI/DHN CT complex hybrid films include CT complexes, which might work as electronic conductors, and sulfonic acid units, which could work as proton conductors. Therefore, the origin of the conductivity of SPI/DHN complex hybrid films was evaluated by four‐probe impedance measurements in the through‐plane direction of the films. The obtained conductivity of the CT complex hybrid films increased with the increase of ion exchange capacity of the CT films and the decrease of CT complex concentration in the films. These results indicated that proton transfer dominantly occurred in the CT complex hybrid films. Proton conductivity of the CT complex hybrid films consisting of 2,6‐ or 1,5‐DHN showed the similar values, although the molecular geometries of the CT complex were different. The activation energy values for proton conductivity in the CT films were approximately the same as that of Nafion 212. Water uptake (WU) results were also conducted and suggest that CT complex formation could control the degree of WU of the films and prevent dissolution of SPI. © 2014 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2014, 52, 2991–2997

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“…However, the existing pathways for proton conduction in the membrane are blocked because of high concentrations of nanoparticles . Furthermore, the contribution of the vehicular mechanism to proton transfer is diminished due to the agglomeration of Fe 2 TiO 5 nanoparticles …”

Section: Organic‐inorganic Polymer Composite Pemsmentioning

confidence: 99%

Non‐Fluorinated Polymer Composite Proton Exchange Membranes for Fuel Cell Applications – A Review

2019

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The critical component of a proton exchange membrane fuel cell (PEMFC) system is the proton exchange membrane (PEM). Perfluorosulfonic acid membranes such as Nafion are currently used for PEMFCs in industry, despite suffering from reduced proton conductivity due to dehydration at higher temperatures. However, operating at temperatures below 100 °C leads to cathode flooding, catalyst poisoning by CO, and complex system design with higher cost. Research has concentrated on the membrane material and on preparation methods to achieve high proton conductivity, thermal, mechanical and chemical stability, low fuel crossover and lower cost at high temperatures. Non‐fluorinated polymers are a promising alternative. However, improving the efficiency at higher temperatures has necessitated modifications and the inclusion of inorganic materials in a polymer matrix to form a composite membrane can be an approach to reach the target performance, while still reducing costs. This review focuses on recent research in composite PEMs based on non‐fluorinated polymers. Various inorganic fillers incorporated in the PEM structure are reviewed in terms of their properties and the effect on PEM fuel cell performance. The most reliable polymers and fillers with potential for high temperature proton exchange membranes (HTPEMs) are also discussed.

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Investigation of the effects of AMPS-modified nanoclay on fuel cell performance of sulfonated aromatic proton exchange membranes

Cited by 25 publications

References 31 publications

Efecto de la sulfonación del estireno-éster acrílico sobre las propiedades de las membranas de intercambio protónico

Efecto de la sulfonación del estireno-éster acrílico sobre las propiedades de las membranas de intercambio protónico

Evaluation of proton conductivity of sulfonated polyimide/dihydroxy naphthalene charge-transfer complex hybrid membranes

Non‐Fluorinated Polymer Composite Proton Exchange Membranes for Fuel Cell Applications – A Review

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