Novel modification method to prepare crosslinked sulfonated poly(ether ether ketone)/silica hybrid membranes for fuel cells

Feng, Shun; Shang, Yu; Guoshun, Liu; Wei, Dong; Xie, Xiang; Xu, Jingming; Mathur, V.K.

doi:10.1016/j.jpowsour.2010.02.067

Cited by 38 publications

(26 citation statements)

References 45 publications

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“…7b shows the proton conductivity of SP, SP Tx and SP AFTx membranes at the temperature range of 25-80 C. In higher temperatures, the proton conductivity enhanced due to increment of the water molecules movement and the mobility increment of the charged species in the membrane. 50,51 The activation energy (E a (kJ mol À1 )) of the proton conduction in the as-prepared membranes was estimated according to Arrhenius equation:…”

Section: Iec and Proton Conductivitymentioning

confidence: 99%

“…The second stage around 300-400 C was ascribed to the disintegration of SO 3 H groups of polymer. 50 The third stage started from about 450 C was assigned to the destruction of the polymer backbone. The presence of TiO 2 and AFT nanoparticles slightly delayed the oxidative degradation of polymer matrix and improved thermal stability of the nanocomposite membranes.…”

Section: Thermal Stability and Mechanical Propertiesmentioning

confidence: 99%

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Enhancing the performance of SPEEK polymer electrolyte membranes using functionalized TiO₂ nanoparticles with proton hopping sites

2017

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Section: Iec and Proton Conductivitymentioning

confidence: 99%

Section: Thermal Stability and Mechanical Propertiesmentioning

confidence: 99%

Enhancing the performance of SPEEK polymer electrolyte membranes using functionalized TiO₂ nanoparticles with proton hopping sites

2017

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“…On the other hand, sol-gel process performed at relatively low temperature might lead to silica having a high content of silanol groups which contribute to high hygroscopic character. 24 The thermal oxidative stability was investigated by thermogravimetric analysis. The initial decomposition temperature and the temperature of 10% weight loss, the maximum decomposition temperature and the residue at 700 C are listed in Table 2.…”

Section: Resultsmentioning

confidence: 99%

Silica-containing fluorinated poly(amide-imide) hybrid films

Hamciuc¹,

Carja²,

Hamciuc³

et al. 2011

High Performance Polymers

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New silica-containing hybrid films were prepared using a fluorinated poly(amide-imide) having hydroxyl groups and tetraethoxysilane, via the sol-gel technique. The polymer was synthesized by solution polycondensation reaction of a mixture of two diamines, 4,4 0 -diamino-4 00 -hydroxy-triphenylmethane and 1,3-bis(4-aminophenoxy)benzene (molar ratio 3/7), with a fluorinated diacid chloride containing imide rings, 2,2-bis[N-(4-chloroformylphenyl)-phthalimidyl]hexafluoroisopropane. To improve the compatibility between the polymer and silica, the pendant hydroxyl groups of the polymer were reacted with 3-(triethoxysilyl)propyl isocyanate. The hybrid films were flexible, tough, and exhibited high thermal stability, having the initial decomposition temperature above 420 C. The surface morphology of the hybrid films was investigated by scanning electron microscopy. Dynamic mechanical analysis and dielectric spectroscopy revealed subglass transitions, g and b, and an a relaxation corresponding to the glass transition temperature. Electrical insulating properties were evaluated on the basis of dielectric constant and dielectric loss and their variation with the frequency and temperature. The values of the dielectric constant at 10 kHz and 20 C were in the range of 3.18-3.48. The influence of the silica content on the polymer properties was examined.

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“…It was reported that the thickness of the Nafion membrane is one of the most essential factors in determining the methanol crossover rate. The methanol crossover decreases with the increase of thickness, whereas increasing the [88], ( ) PVA/SiO 2 [89], ( ) CS/(P(AA-AMPS) [108], ( ) SPS/PTFE [109], ( ) DBSA-PEG / SiO 2 [110], ( ) PVA/PWA [90], ( ) PVA [98], (X) CS/PTNT [101], ( ) CS/STiO 2 [102], ( ) CS/silica [103], ( ) PI/SPES [99],( ) CS/TNT [91], ( ) sPEEK-OMB [105], ( ) PVA/SSA/sPBS [106], ( ) SPEEK/ PVA [107], (+) CPV [111], () SPEEK/TPA/MCM-41 [104], () PAMPS [112], () PVA/ZrP/SWA [92], ( ) AESA-Na [93],( ) SPEEK [100], ( ) SPAEK [113], (@) PVA/sulfated b-cyclodextrin [94] ($) PE-SHSBS [114], (a) SPEEK-PEEK-BI [115],(C) SPEEK/PVDF/PWA [116],(#) CS/Beta/SO 3 H [95], (&) Nitrated SPEEK [117], (^) STMPEEK/TMBP/PNBS [118], (*) PI-PVA-TSGEPS [110], (À) AEMss [97].…”

Section: Membrane Thicknessmentioning

confidence: 94%

A review on methanol crossover in direct methanol fuel cells: challenges and achievements

Ahmed

Dinçer

2011

Int. J. Energy Res.

234

125

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SUMMARYDirect methanol fuel cells have the potential to power future microelectronic and portable electronic devices because of their high energy density. One of the major obstacles that currently prevent the widespread applications of direct methanol fuel cells is the methanol crossover through the polymer-electrolyte membrane. Methanol crossover is closely related to several factors including membrane structure and morphology, membrane thickness, and fuel cell operating conditions such as temperature, pressure, and methanol feed concentration. This work presents a comprehensive overview of the state-ofthe-art technology for the most important factors, affecting methanol crossover in direct methanol fuel cells. In addition, the current and future directions of the research and development activities, aiming to reduce the methanol crossover are reviewed and discussed in order to improve the performance of direct methanol fuel cells.

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Novel modification method to prepare crosslinked sulfonated poly(ether ether ketone)/silica hybrid membranes for fuel cells

Cited by 38 publications

References 45 publications

Enhancing the performance of SPEEK polymer electrolyte membranes using functionalized TiO₂ nanoparticles with proton hopping sites

Enhancing the performance of SPEEK polymer electrolyte membranes using functionalized TiO₂ nanoparticles with proton hopping sites

Silica-containing fluorinated poly(amide-imide) hybrid films

A review on methanol crossover in direct methanol fuel cells: challenges and achievements

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Novel modification method to prepare crosslinked sulfonated poly(ether ether ketone)/silica hybrid membranes for fuel cells

Cited by 38 publications

References 45 publications

Enhancing the performance of SPEEK polymer electrolyte membranes using functionalized TiO2 nanoparticles with proton hopping sites

Enhancing the performance of SPEEK polymer electrolyte membranes using functionalized TiO2 nanoparticles with proton hopping sites

Silica-containing fluorinated poly(amide-imide) hybrid films

A review on methanol crossover in direct methanol fuel cells: challenges and achievements

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Product

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Enhancing the performance of SPEEK polymer electrolyte membranes using functionalized TiO₂ nanoparticles with proton hopping sites

Enhancing the performance of SPEEK polymer electrolyte membranes using functionalized TiO₂ nanoparticles with proton hopping sites