Synthesis and characterization of neodymium oxide modified nafion membrane for direct alcohol fuel cells

Barbora, Lepakshi; Singh, Rupesh Kumar; Shroti, Nivedita; Verma, Anil

doi:10.1016/j.matchemphys.2010.02.036

Cited by 31 publications

(24 citation statements)

References 37 publications

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“…Before the measurement, the membrane was equilibrated with de-ionized water for at least 24 h. 35 Then the membrane was clamped between two compartments. One compartment was filled with water and another compartment was filled with 0.25M H 2 SO 4 .…”

Section: Proton Conductivitymentioning

confidence: 99%

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Development of sulfonated poly(ether ether ketone)/zirconium titanium phosphate composite membranes for direct methanol fuel cell

Rani

Beera

Pugazhenthi

2011

J of Applied Polymer Sci

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The present work addresses the development of economic membrane material with superior proton conductivity and less methanol crossover. Sulfonated poly(ether ether ketone) (SPEEK) composite membranes with various loading of zirconium titanium phosphate (ZTP) have been prepared by solution casting method. The structural and thermal properties of the ZTP powder are evaluated using X-ray diffraction (XRD), scanning electron microscopy (SEM), BET surface area measurement, Fourier transform infrared spectroscopy (FTIR), and Thermo gravimetric analysis (TGA). The produced composite membranes are also characterized by evaluating the ion exchange capacity (IEC), water uptake, methanol uptake, thermal stability, proton conductivity, and methanol crossover as a function of ZTP loading. The proton conductivity of composite membrane is fourfold higher than that of the pure SPEEK membrane and also increases with an increase in the ZTP loading. The methanol permeability of the composite membrane containing 15% ZTP decreases by 264% (and 21%) when compared with pure SPEEK (and commercial Nafion 117 membrane). Over all, the selectivity of the SPEEK/ZTP composite membrane is found to be 15-and 3-fold higher than the pure SPEEK membrane and Nafion 117 membrane, respectively. Hence, the synthesized SPEEK composite membrane could be utilized as low cost alternative for the high cost commercial membranes. V C 2011 Wiley Periodicals, Inc. J Appl Polym Sci 124: E45-E56, 2012

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Section: Proton Conductivitymentioning

confidence: 99%

“…35 Methanol permeability was investigated in a two-compartment permeability cell. The membrane was clamped between two compartments.…”

Section: Methanol Permeabilitymentioning

confidence: 99%

Development of sulfonated poly(ether ether ketone)/zirconium titanium phosphate composite membranes for direct methanol fuel cell

Rani

Beera

Pugazhenthi

2011

J of Applied Polymer Sci

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“…As in the case of water uptake, methanol uptake from the liquid phase is higher than from the vapor phase when compared for the same membrane under the same treatment. This phenomenon, known as Schroeder's paradox, is related to the thermal history of the adsorbing polymer [90].…”

Section: Alcohol Uptakementioning

confidence: 99%

“…Verma and coworkers [90][91][92] studied the methanol and ethanol uptake in Nafion/Nd 2 O 3 , Nafion/Nd triflate, and Nafion/Er triflate. In all the cases they observed a slight increase of the mass total uptake with alcohol concentration (between 0.5 M and 2 M) and a very small increase of the uptake with the inorganic phase content.…”

Section: Water-alcohol Uptake and Partition Constantmentioning

confidence: 99%

Membranes for Direct Alcohol Fuel Cells

Corti

2013

Direct Alcohol Fuel Cells

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This chapter is devoted to summarize and discuss the main properties of ionomeric membranes used in direct alcohol PEM fuel cells. Although Nafion is the proton exchange membrane commonly used in methanol and other direct alcohol fuel cells, other proton and alkaline membranes are being investigated in order to improve the efficiency of DAFC. The goals in the development of this critical component of DAFC are: low cost, long durability, low alcohol permeability and high electrical conductivity. The last two properties can be combined in a single parameter, the membrane selectivity that accounts for the ratio between the proton and alcohol transport through the membrane. This parameter can be compared to that measured for Nafion to define a relative selectivity, which is a primary parameter to evaluate the potentiality of a ionomer material to be used in alcohol feed fuel cells.The vast catalogue of polymeric materials reviewed here included Nafion composite with inorganic and organic fillers, and non-fluorinated proton conducting membranes such as sulfonated polyimides, poly(arylene ether)s, polysulfones, poly (vinyl alcohol), polystyrenes, and acid-doped polybenzimidazoles. Anionexchange membranes are also discussed because of the facile electro-oxidation of alcohols in alkaline media and because of the minimization of alcohol crossover in alkaline direct alcohol fuel cells.The performance of different types of membranes in direct alcohol fuel cells, mainly methanol, are summarized and discussed in order to identify the most promissory ones. The lack of correlation between the relative selectivity and fuel cell performance of the membranes indicates that the architecture of the three

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“…These results were consistent with Kumar's work [12] that lower methanol permeability was achieved from Nafion coated and laminated with sulfonated polyvinyllidinefluoride (PVDF). Barbora et al [13] studied neodymium oxide modified Nafion membrane for direct alcohol fuel cells. The pure Nafion and 5%wt composite membrane showed that the permeability of ethanol (1.22×10 -7 cm 2 /s and 0.85×10 -7 cm 2 /s, respectively) was less than that of methanol (1.38×10 -7 cm 2 /s and 0.95×10 -7 cm 2 /s, respectively) due to the larger molecule of ethanol.…”

Section: Introductionmentioning

confidence: 99%

Surface modification of mordenite in Nafion composite membrane for direct ethanol fuel cell and its characterizations: Effect of types of silane coupling agent

Prapainainar

Kanjanapaisit

Kongkachuichay

et al. 2016

Journal of Environmental Chemical Engineering

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(P. Prapainainar).2 Highlight  Silane treated mordenite composite membrane was used for DEFC.  Four types of silane coupling agents were treated on MOR surface.  Sulfhydryl group in MPTES provided sulfonic group for enhance proton conductivity.  MOR-MPTES/Nafion membrane had the highest selectivity at all temperature. AbstractMordenite (MOR) has been used to solve the alcohol crossover in direct ethanol fuel cells. However, the lack of compatibility has been a problem. This paper shows the compatibility improvement of MOR in a Nafion composite membrane for use in a fuel cell using four types of silane coupling agents: gamma-glycidoxypropyltrimethoxysilane (GMPTS), (3-mercaptopropyl) trimethoxysilane (MPTS), (3-Mercaptopropyl) triethoxysilane (MPTES) and (3-Mercaptopropyl) methyl-dimethoxysilane (MPDMS). The coupling agents were used to treat the MOR surface before mixing with Nafion. Each type of silane was treated carefully and differently, depending on its structure. Their characterizations were also described. The results showed that better compatibility and a noticeable reduction in ethanol permeability were achieved when using all silane-treated MOR in the composite. It was found that the Nafion/MOR-MPTES membrane had the highest proton conductivity at all temperature ranges from 30-70 o C. This was due to the fact that the sulfhydryl (-SH) functional group in MPTES provided the sulfonic group in its structure after the oxidation in the surface treatment process. These sulfonic groups at the MOR surface facilitated proton transport and improved the selectivity of the membrane.

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Synthesis and characterization of neodymium oxide modified nafion membrane for direct alcohol fuel cells

Cited by 31 publications

References 37 publications

Development of sulfonated poly(ether ether ketone)/zirconium titanium phosphate composite membranes for direct methanol fuel cell

Development of sulfonated poly(ether ether ketone)/zirconium titanium phosphate composite membranes for direct methanol fuel cell

Membranes for Direct Alcohol Fuel Cells

Surface modification of mordenite in Nafion composite membrane for direct ethanol fuel cell and its characterizations: Effect of types of silane coupling agent

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