Preparation and characterization of sulfonated polysulfone/titanium dioxide composite membranes for proton exchange membrane fuel cells

Devrim, Yılser; Erkan, Serdar; Baç, Nurcan; Eroğlu, İnci

doi:10.1016/j.ijhydene.2009.02.019

Cited by 185 publications

(104 citation statements)

References 32 publications

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“…In the case of composite mem branes, and at the same sulfonic acid content, water uptake of the different SPSU/LDH composite membranes is lower than SPSU membrane. This behavior was found in other composite membrane system [29,30] and it was attributed to the reduction of the free volume and swelling ability, however this argument cannot be admitted in this case because the water uptake increases with the amount of LDH. This situation is compatible with the formation of hydrogen bonding between sulfonic acid group and the hydrotalcite type compound.…”

Section: Water Uptake Measurementsmentioning

confidence: 59%

Synthesis and characterization of polysulfone/layered double hydroxides nanocomposite membranes for fuel cell application

Herrero

Martos

Várez

et al. 2014

International Journal of Hydrogen Energy

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Section: Water Uptake Measurementsmentioning

confidence: 59%

Synthesis and characterization of polysulfone/layered double hydroxides nanocomposite membranes for fuel cell application

Herrero

Martos

Várez

et al. 2014

International Journal of Hydrogen Energy

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“…3 Regarding to the membranes, the spectrum of sPSU (Fig. 3b) showed the characteristic peak at 1024 cm 1 which are assigned to the symmetric stretching of the sulfonate group [29]. The presence of this signal, which is not shown on PSU spectrum, confirmed the success of the sulfonation reaction.…”

Section: Ft Ir Analysismentioning

confidence: 86%

Synthesis and characterization of novel hybrid polysulfone/silica membranes doped with phosphomolybdic acid for fuel cell applications

Martínez-Morlanes

Martos

Várez

et al. 2015

Journal of Membrane Science

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Novel proton conducting composite membranes based on sulfonated polysulfone (sPSU)/SiO 2 doped with phosphomolybdic acid (PMoA) were synthesized, and their proton conductivity in acid solutions was evaluated. The hybrid membranes were prepared by casting and the characterization by scanning electron microscopy (SEM), Fourier transform infrared (FTIR) and X ray diffraction (XRD) confirmed the presence of the inorganic charges into the polymer. Thermal properties and proton conductivity were also studied by means of thermogravimetric analysis (TGA) and electrochemical impedance spectro scopy (EIS), respectively. The incorporation of the inorganic particles modified the thermal and mechanical properties of the sPSU as well as its proton conductivity. Taking into account that a compromise between these properties is necessary, the hybrid membrane with 2%SiO 2 and 20%PMoA seems to be a promising candidate for its application in proton exchange membrane in fuel cells (PEMFCs) operated at high temperatures.

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“…In the frequency range of 1050e1000 cm À1 , two characteristic peaks were observed [22]. In particular, the band located at 1014 cm À1 was due to the symmetric stretching vibration of the diphenylether unit, and the peak at 1028 cm À1 was assigned to the symmetric stretching vibration of the sulfonated group.…”

Section: Ft Ir Analysismentioning

confidence: 97%

“…The sulfonic groups induced (i) interchain hydrogen bonding between the acidic moieties and (ii) bulkiness. The bulkiness hinders the internal rotation of high mo lecular chain segments, increasing the Tg of SPSU [22,23].…”

Section: Differential Scanning Calorimetrymentioning

confidence: 99%

Electrochemical and structural characterization of sulfonated polysulfone

et al. 2015

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a b s t r a c tWe describe the synthesis, as well as the electrochemical and structural characterization, of sulfonated polysulfone intended for use in PEM fuel cells. Starting from a commercial polysulfone, we assessed the performance of these prepared ionomers using synthesis protocols compatible with industrial produc tion. The efficiency of the trimethylsilyl chlorosulfonate and chlorosulfonic acid reagents in the sulfo nation process was confirmed by 1 H NMR, FTIR, elemental analysis, chemical titration and thermal analysis (DSC and TGA). Chlorosulfonic acid was the most effective sulfonation reagent. However, based on SEC MALLS, this reagent induced degradation of the backbone that is detrimental to the thermo mechanical stability and lifespan of the membranes. The electrical characterization of the membranes was undertaken using impedance spectroscopy in contact with different HCl aqueous solutions at various temperatures. The activation energies, which ranged from 8.2 to 11 kJ/mol, were in agreement with the prevailing proton vehicular mechanism.

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Preparation and characterization of sulfonated polysulfone/titanium dioxide composite membranes for proton exchange membrane fuel cells

Cited by 185 publications

References 32 publications

Synthesis and characterization of polysulfone/layered double hydroxides nanocomposite membranes for fuel cell application

Synthesis and characterization of polysulfone/layered double hydroxides nanocomposite membranes for fuel cell application

Synthesis and characterization of novel hybrid polysulfone/silica membranes doped with phosphomolybdic acid for fuel cell applications

Electrochemical and structural characterization of sulfonated polysulfone

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