Nanofiber-based polyelectrolytes as novel membranes for fuel cell applications

Shabani, Iman; Hasani-Sadrabadi, Mohammad Mahdi; Haddadi‐Asl, Vahid; Soleimani, Masoud

doi:10.1016/j.memsci.2010.11.048

Cited by 127 publications

(57 citation statements)

References 41 publications

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“…This approach involves electrospinning a polymer solution to obtain a nanofiber mat which is afterwards filled with a proton conductive polymer matrix [21][22][23][24][25][26][27][28], although insulating polymers infiltrated into proton conductive nanofibers has also been proposed [29,30]. Interestingly, it has been found that proton conducting nanofibers exponentially increase conductivity with decrease in fiber diameter [25,31].…”

Section: Introductionmentioning

confidence: 99%

Nanocomposite SPEEK-based membranes for Direct Methanol Fuel Cells at intermediate temperatures

Mollá

Compañ

2015

Journal of Membrane Science

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Novel nanocomposite membranes were prepared by infiltration of a blend of sulfonated PEEK (SPEEK) with polyvinyl alcohol (PVA), using water as solvent, into electrospun nanofibers of SPEEK blended with polyvinyl butyral (PVB). The membranes were characterized for their application on Direct Methanol Fuel Cells (DMFCs) operating at moderate temperatures (>80 ºC). An important role of the solvent on the crosslinking temperature for the SPEEK-PVA system was observed. A mat of hydrated SPEEK-30%PVB nanofibers revealed a higher proton conductivity in comparison with a dense membrane of similar composition. Incorporation of the nanofiber mats to the SPEEK-35%PVA matrix provided mechanical stability, methanol barrier properties and certain proton conductivity up to a crosslinking temperature of 120 ºC. Not remarkable effect of the nanofibers was found above that crosslinking temperature. The combined effect of the nanofibers and crosslinking temperature on the properties of the membranes is discussed. DMFC performance experiments concluded promising results for this new low-cost type of membranes, although further optimization steps are still required.

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Section: Introductionmentioning

confidence: 99%

Nanocomposite SPEEK-based membranes for Direct Methanol Fuel Cells at intermediate temperatures

Mollá

Compañ

2015

Journal of Membrane Science

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“…[34][35][36][37][38][39][40][41][42][43] In this sense, electrospun nanobers are receiving considerable attention in the fabrication of novel proton exchange membranes with enhanced mechanical, chemical and proton conductivities [36][37][38][39][40][41] where the conduction mechanism can occur more efficiently through the surface of the nanobers.…”

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confidence: 99%

Conductivity of composite membrane-based poly(ether-ether-ketone) sulfonated (SPEEK) nanofiber mats of varying thickness

et al. 2016

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Nanofiber mats of SPEEK 70wt% -PVB 30 wt% (polyvinyl butyral)-based composite membranes were prepared by varying the electrospinning time in order to obtain mats with different thicknesses. These mats were embedded in SPEEK 65wt% -PVA 35wt% (polyvinyl alcohol) polymer solution to fill the pores in the fibers. The obtained membranes with different mat thicknesses have been characterized by water uptake, ionic exchange capacity, scanning electron microscopy, mechanical properties and proton conductivity.Microtensile test studies reveal that the maximum tensile strength increases as the thickness of the SPEEK-PVB nanofiber mats increases, resulting in more flexible composite membranes compared to a pure SPEEK-PVA membrane obtained by casting. The proton conductivity occurs more easily through the nanofiber than through the matrix phase, and the best conductivity (0.038 S cm À1) was measured at 120 C for the composite membrane of SPEEK-PVB nanofiber mats obtained after 12 hours of electrospinning time. This value suggests that our composite membranes have high potential to function in the temperature range between 100 and 140 C without losing their strength and while maintaining their high proton conductivity, making them an excellent candidate for fuel cells that operate at intermediate temperatures.

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“…For example, nanofibers prepared through electrospinning have received attention. [138][139][140] It shows that the nanofiber ion exchange membranes would have higher ionic conductivity, lower gas permeability and longer durability. Recently, we reported a new approach assisting supercritical carbon dioxide (Sc-CO 2 ) to enhance performance of Nafion membranes.…”

Section: Further Development Of Anion Exchange Membranes (Aems)mentioning

confidence: 99%

Direct oxidation alkaline fuelcells: from materials to systems

Wang

Krewer

et al. 2012

Energy Environ. Sci.

234

153

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Direct oxidation alkaline fuel cells (DOAFCs) possess particular advantages on the possibility of employing low cost non-noble metal catalysts. A wide range of fuels can be used due to superior reaction kinetics in alkaline media. The development of DOAFCs was hindered by the carbonation of electrolyte due to the presence of CO 2 . The application of the anion exchange membrane (AEM) provides the possibility of reducing the effect of carbonation and fuel crossover which is an issue in the proton exchange membrane fuel cells (PEMFCs). The latest developments in alkaline fuel cells are examined in this paper, considering different types of fuels, novel catalysts and anion exchange membranes. Moreover, alkaline fuel cell systems and configurations are studied, particularly the new designs for portable or microelectronic devices. Further development of DOAFCs will rely on novel AEMs with good ionic conductivity and stability, low cost non-Pt catalysts with high activity and good stability for various fuels and oxidant. We envisage that DOAFCs will play a major role in energy research and applications in the near future.

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Nanofiber-based polyelectrolytes as novel membranes for fuel cell applications

Cited by 127 publications

References 41 publications

Nanocomposite SPEEK-based membranes for Direct Methanol Fuel Cells at intermediate temperatures

Nanocomposite SPEEK-based membranes for Direct Methanol Fuel Cells at intermediate temperatures

Conductivity of composite membrane-based poly(ether-ether-ketone) sulfonated (SPEEK) nanofiber mats of varying thickness

Direct oxidation alkaline fuelcells: from materials to systems

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