Composite Membranes Based on Heteropolyacids and Their Applications in Fuel Cells

Abouzari‐Lotf, Ebrahim; Nasef, Mohamed Mahmoud; Zakeri, Masoumeh; Ahmad, Arshad; Ripin, Adnan

doi:10.1007/978-3-319-52739-0_5

Cited by 4 publications

(3 citation statements)

References 181 publications

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“…It should be noted that despite the Keggin unit being preserved, in accordance with the results of Fourier transform infrared (FT–IR) spectroscopy and microcalorimetry on water sorption, changes in hydration state were reversible with the exposure to gas-phase water only between 100 °C and 200 °C [20]. The excellent thermal stability and water-retention capability make HPAs potential for using in high-temperature and low-humidity PEMFCs [14].…”

Section: Advantages Of Polyoxometalates (Poms) In Proton Exchange mentioning

confidence: 76%

“…One of the main groups of POMs, heteropolyacids (HPAs), displaying strong Brönsted acidity and the highest proton conductivity in their fully hydrated state among inorganic solids near ambient temperatures, are promising candidates for fabricating composite PEMs. A large number of bonded water molecules, high thermal stability, structural flexibility and mobility of HPAs are beneficial for fuel cell applications as well [11,12,13,14]. Nevertheless, the high water solubility of HPAs leading to the progressive leakage from membranes and the decrease of proton conductivity is a well-recognized obstacle to using HPA-based PEMs.…”

Section: Introductionmentioning

confidence: 99%

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Polyoxometalate–Polymer Hybrid Materials as Proton Exchange Membranes for Fuel Cell Applications

Zhai

2019

Molecules

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As one of the most efficient pathways to provide clean energy, fuel cells have attracted great attention in both academic and industrial communities. Proton exchange membranes (PEMs) or proton-conducting electrolytes are the key components in fuel cell devices, which require the characteristics of high proton conductivity as well as high mechanical, chemical and thermal stabilities. Organic–inorganic hybrid PEMs can provide a fantastic platform to combine both advantages of two components to meet these demands. Due to their extremely high proton conductivity, good thermal stability and chemical adjustability, polyoxometalates (POMs) are regarded as promising building blocks for hybrid PEMs. In this review, we summarize a number of research works on the progress of POM–polymer hybrid materials and related applications in PEMs. Firstly, a brief background of POMs and their proton-conducting properties are introduced; then, the hybridization strategies of POMs with polymer moieties are discussed from the aspects of both noncovalent and covalent concepts; and finally, we focus on the performance of these hybrid materials in PEMs, especially the advances in the last five years. This review will provide a better understanding of the challenges and perspectives of POM–polymer hybrid PEMs for future fuel cell applications.

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Section: Advantages Of Polyoxometalates (Poms) In Proton Exchange mentioning

confidence: 76%

Section: Introductionmentioning

confidence: 99%

Polyoxometalate–Polymer Hybrid Materials as Proton Exchange Membranes for Fuel Cell Applications

Zhai

2019

Molecules

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“…A number of inorganic compounds, which possess ion exchange properties, is applied to modification of polymers. Some examples are as follows: phosphorus-containing salts and hydrated oxides of multivalent metals (zirconium [13, 21, 27-29, 56-58, 61, 62, 75], iron [75,76], aluminum [77], titanium [25,[78][79][80], tin [75,81,82], hafnium [83]), silica [60,80,84,85], heteropolyacids [82,86,87], polyantimonic acid (PAA) [88,89], nature clay minerals [90,91]. Following polymers are modified: styren-divynilbenzene [21, 27-29, 56-58, 61, 62, 75], polyaniline [79,82], poly (eter eter ketone) [90], PFM [13,73,80,83] and other polymers.…”

Section: Purposeful Formation Of Inorganic Particles In Ion Exchange ...mentioning

confidence: 99%

Ionic Transport in Sol-Gel Derived Organic-Inorganic Composites

Dzyazko

Volfkovich

2019

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This chapter is devoted to organic-inorganic composite ion exchange resins and membranes. We ascertain interrelation between composition, morphology and porous structure of the materials on the one hand and ion transport through them on the other hand. The composites for different practical application (fuel cells, ion exchange columns, electrodialysis) are in a focus of attention. Porosity of a polymer constituent of the composite was determined with a method of standard contact porosimetry, which gives information about pores in a very wide diapason (from 2 nm to 200 μm). In this context, pore formation in ion exchange polymers during swelling is considered. A number of parameters, which are obtained from porosimetric measurements, can be used for interpretation of ion transport regularities, particularly evolution of electrical conductivity. Embedded non-aggregated nanoparticles, their aggregates and agglomerates affect differently porosity of the polymer constituent: they are able to block, stretch and squeeze pores, As a result, the composites demonstrates different rate of ion transport depending on amount and size of the inorganic particles. The approach to purposeful formation of one or other types of particles has been proposed.

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Caesium Salt of Tungstophosphoric Acid Supported on Mesoporous SBA-15 Catalyst for Selective Esterification of Lauric Acid with Glycerol to Monolaurin

2017

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Composite Membranes Based on Heteropolyacids and Their Applications in Fuel Cells

Cited by 4 publications

References 181 publications

Polyoxometalate–Polymer Hybrid Materials as Proton Exchange Membranes for Fuel Cell Applications

Polyoxometalate–Polymer Hybrid Materials as Proton Exchange Membranes for Fuel Cell Applications

Ionic Transport in Sol-Gel Derived Organic-Inorganic Composites

Caesium Salt of Tungstophosphoric Acid Supported on Mesoporous SBA-15 Catalyst for Selective Esterification of Lauric Acid with Glycerol to Monolaurin

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