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

Herrero, Miguel A.; Martos, A.M.; Várez, A.; Galván, J.C.; Levenfeld, B.

doi:10.1016/j.ijhydene.2013.06.041

Cited by 35 publications

(15 citation statements)

References 33 publications

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“…All mem branes were placed in contact with different acid concentrations (10 3 rc r0.1 M) during a specific period of time. As expected Nyquist plots changed with the HCl concentration (data do not shown) and it was attributed to the concentration dependence of the electrolyte solution embedded in the membrane matrix [8,15]. The evolution of the conductivity with the amount of HMo LDH is showed in Fig.…”

Section: Resultssupporting

confidence: 61%

“…3). The conductivity values increases with the amount of HMo LDH and it is slightly higher than nanocomposites membranes of SPSU/LDH [8].…”

Section: Resultsmentioning

confidence: 87%

“…The molar ratio of PSU: TMSCS was 1:3 and the sulfonation degree determined from 1 H NMR experiments was 0.77. The synthesis of Zn,Al NO 3 (LDH) was carried out by the co precipitation method [8,10]. Thus, the solution of with Zn:Al molar ratio of 2, prepared with Zn(NO 3 ) 2 Á 6H 2 O and Al(NO 3 ) 3 Á 9H 2 O, were added drop wise to a solution of 1 M NaOH, with stirring and the pH was maintained at 8.0.…”

Section: Methodsmentioning

confidence: 99%

“…Recently, we have prepared sulfonated polysulfone (SPSU)/layered double hydroxide (LDH) composite membranes, in which the con ductivity was improved [8]. Herein, we present the synthesis and characterization of new SPSU composites membranes with nanopow ders of Zn,Al LDH intercalated with a heptamolibdate, (NH 4 ) 6 Mo 7 O 24 .…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and characterization of new membranes based on sulfonated polysulfone/Zn,Al-heptamolibdate LDH

et al. 2015

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a b s t r a c tNew proton conducting organic/inorganic nano hybrid polymer electrolyte membranes were synthe sized by solving casting method. Inorganic nanopowders were a layered double hydroxides (LDH) with Zn,Al cations in which heptamolybdate were inserted. These nanopowders were prepared by anion exchange method from hydrotalcite (LDH) with interlayer anions (NO 3 ). The sulfonated polymers were prepared by an electrophilic aromatic substitution reaction between the polymer and trimethylsylil cholorosulfonate (TMSCS).The composites membranes were characterized by FTIR and TGA and water uptake was determined. Electrochemical impedance spectroscopy (EIS) was used to study the proton conductivity of the membranes. EIS measurements were performed facing the membrane to different HCl concentrations (10 3 rc r10 1 M). It was concluded that these new composite membranes present good thermal properties and proton conductivity slightly higher than SPSU.

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Section: Resultssupporting

confidence: 61%

“…3). The conductivity values increases with the amount of HMo LDH and it is slightly higher than nanocomposites membranes of SPSU/LDH [8].…”

Section: Resultsmentioning

confidence: 87%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Synthesis and characterization of new membranes based on sulfonated polysulfone/Zn,Al-heptamolibdate LDH

et al. 2015

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“…This is related to the structure of its repeating unit [OC 6 H 4 OC 6 H 4 SO 2 C 6 H 4 ] n providing excellent properties such as thermal stability (150–170 °C), chemical inertness over the whole pH range, mechanical strength (fracture toughness, flexion and torsion) and processability [16,33,34,35]. Recently, several investigations focused on PS membranes for a wide range of applications such as micro-/ultra-filtration in water and wastewater treatment, membrane distillation, membrane oxygenators, gas separation, pervaporation, separator for lithium ion battery, plasma separator and support for composite membranes [16,34,36,37,38,39,40,41].…”

Section: Methodsmentioning

confidence: 99%

A Review on Porous Polymeric Membrane Preparation. Part I: Production Techniques with Polysulfone and Poly (Vinylidene Fluoride)

2019

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Porous polymeric membranes have emerged as the core technology in the field of separation. But some challenges remain for several methods used for membrane fabrication, suggesting the need for a critical review of the literature. We present here an overview on porous polymeric membrane preparation and characterization for two commonly used polymers: polysulfone and poly (vinylidene fluoride). Five different methods for membrane fabrication are introduced: non-solvent induced phase separation, vapor-induced phase separation, electrospinning, track etching and sintering. The key factors of each method are discussed, including the solvent and non-solvent system type and composition, the polymer solution composition and concentration, the processing parameters, and the ambient conditions. To evaluate these methods, a brief description on membrane characterization is given related to morphology and performance. One objective of this review is to present the basics for selecting an appropriate method and membrane fabrication systems with appropriate processing conditions to produce membranes with the desired morphology, performance and stability, as well as to select the best methods to determine these properties.

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

Cited by 35 publications

References 33 publications

Synthesis and characterization of new membranes based on sulfonated polysulfone/Zn,Al-heptamolibdate LDH

Synthesis and characterization of new membranes based on sulfonated polysulfone/Zn,Al-heptamolibdate LDH

A Review on Porous Polymeric Membrane Preparation. Part I: Production Techniques with Polysulfone and Poly (Vinylidene Fluoride)

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

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