Hydrogen and Fuel Cell Inc.

Arcadia, CA, United States

Hydrogen and Fuel Cell Inc.

Arcadia, CA, United States

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Hasani-Sadrabadi M.M.,Amirkabir University of Technology | Hasani-Sadrabadi M.M.,Ecole Polytechnique Federale de Lausanne | Dashtimoghadam E.,Amirkabir University of Technology | Majedi F.S.,Amirkabir University of Technology | And 3 more authors.
International Journal of Hydrogen Energy | Year: 2011

A novel double layer proton exchange membrane (PEM) comprising a layer of structurally modified chitosan, as a methanol barrier layer, coated on Nafion®112 was prepared and assessed for direct methanol fuel cell (DMFC) applications. Scanning electron microscope (SEM) micrographs of the designed membrane revealed a tight adherence between layers, which indicate the high affinity of opposite charged polyelectrolyte layers. Proton conductivity and methanol permeability measurements showed improved transport properties of the designed membrane compared to Nafion®117. Moreover, DMFC performance tests revealed a higher open circuit voltage and power density, as well as overall fuel cell efficiency for the double layer membrane in comparison with Nafion®117, especially at elevated methanol solution feed. The obtained results indicate the designed double layer membrane as a promising PEM for high-performance DMFC applications. © 2011, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights.


Haghighi A.H.,Islamic Azad University at Shiraz | Hasani-Sadrabadi M.M.,Amirkabir University of Technology | Hasani-Sadrabadi M.M.,Ecole Polytechnique Federale de Lausanne | Dashtimoghadam E.,Amirkabir University of Technology | And 6 more authors.
International Journal of Hydrogen Energy | Year: 2011

Various sulfonated poly (2,6-dimethyl-1,4-phenylene oxide) (SPPO)-polybenzimidazole (PBI) blend membranes were prepared and investigated as proton exchange membranes (PEMs) for direct methanol fuel cell (DMFC) applications. With increasing PBI content water swelling, ion exchange capacity, proton conductivity and methanol permeability of SPPO-PBI membranes were found to be decreased due to acid-base interactions between sulfonate and the amine groups of the blended components. Among various SPPO-PBI blend membranes, 80:20 wt% was found as the optimum composition, which showed the highest membrane selectivity parameter. Direct methanol-air single fuel cell tests revealed a higher cell efficiency of 11.6% for SPPO80-PBI20 than 10.9% for Nafion ®117 at 5 M methanol feed, and also a higher power density of 57.6 mW.cm-2 compared to 39.4 mW.cm-2 for Nafion ®117. Transport properties as well as DMFC performance results of SPPO-PBI blend PEMs converge to indicate their potential for DMFC applications. © 2010, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.


Majedi F.S.,Ecole Polytechnique Federale de Lausanne | Majedi F.S.,Amirkabir University of Technology | Hasani-Sadrabadi M.M.,Ecole Polytechnique Federale de Lausanne | Hasani-Sadrabadi M.M.,Amirkabir University of Technology | And 5 more authors.
Physica Status Solidi - Rapid Research Letters | Year: 2012

Interaction between negatively charged Nafion ® and a positively charged polybenzimidazole-decorated carbon nanotube leads to the formation of an ionic complex with high charge density for proton conduction, which can lead to an improvement in transport properties. Here we investigate the high-temperature and low-humidity proton conductivity of this nanocomposite membrane as a potential membrane for fuel cell applications. © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.


Hasani-Sadrabadi M.M.,Amirkabir University of Technology | Hasani-Sadrabadi M.M.,Ecole Polytechnique Federale de Lausanne | Shabani I.,Amirkabir University of Technology | Shabani I.,Stem Cell Technology Research Center | And 2 more authors.
Journal of Power Sources | Year: 2011

New types of triple-layer membranes were fabricated using multi-step impregnation of Nafion in electrospun webs based on bead-free nanofibers of sulfonated poly(ether sulfone) (SPES). The results showed that the fabricated nanofiber-filled membrane owing to its reduced methanol permeability as well as sufficient proton conductivity and membrane selectivity can be used as a promising proton exchange membrane for direct methanol fuel cell (DMFC) applications. The single cell DMFC performance results revealed that the SPES nanofiber-based triple-layer membranes have higher electrochemical performance than commercial Nafion membranes. © 2011 Elsevier B.V. All rights reserved.


Hasani-Sadrabadi M.M.,Ecole Polytechnique Federale de Lausanne | Hasani-Sadrabadi M.M.,Amirkabir University of Technology | Majedi F.S.,Ecole Polytechnique Federale de Lausanne | Vandersarl J.J.,Ecole Polytechnique Federale de Lausanne | And 5 more authors.
Journal of the American Chemical Society | Year: 2012

At nanoscale length scales, the properties of particles change rapidly with the slightest change in dimension. The use of a microfluidic platform enables precise control of sub-100 nm organic nanoparticles (NPs) based on polybenzimidazole. Using hydrodynamic flow focusing, we can control the size and shape of the NPs, which in turn controls a number of particle material properties. The anhydrous proton-conducting nature of the prepared NPs allowed us to make a high-performance ion exchange membrane for fuel cell applications, and microfluidic tuning of the NPs allowed us subsequently to tune the fuel cell performance. © 2012 American Chemical Society.


Hasani-Sadrabadi M.M.,Ecole Polytechnique Federale de Lausanne | Hasani-Sadrabadi M.M.,Amirkabir University of Technology | Dashtimoghadam E.,Amirkabir University of Technology | Majedi F.S.,Ecole Polytechnique Federale de Lausanne | And 4 more authors.
RSC Advances | Year: 2013

Here we show that the transport properties and electrochemical performance of polyelectrolyte membranes are improved through the dispersion of chitosan-wrapped carbon nanotubes, for direct methanol fuel cell applications. Methanol permeability is reduced via improving the interfacial interactions and the solubilization of CNTs in the Nafion matrix, as well as inducing the formation of long-range oriented conduction pathways in the vicinity of the decorated one-dimensional nanostructure. The improved membrane selectivity results in a considerably enhanced fuel cell efficiency (16% vs. 11%) and a power generation capacity more than two times higher (110 mW cm-2vs. 47 mW cm-2) in a concentrated methanol solution (5 M), in comparison with the commercial Nafion®117 membrane. © The Royal Society of Chemistry 2013.


Hasani-Sadrabadi M.M.,Ecole Polytechnique Federale de Lausanne | Hasani-Sadrabadi M.M.,Amirkabir University of Technology | Dashtimoghadam E.,Amirkabir University of Technology | Majedi F.S.,Amirkabir University of Technology | And 3 more authors.
Nanoscale | Year: 2013

Here we demonstrate design and electrochemical characterization of novel proton exchange membranes based on Nafion and superacid-doped polymer coated carbon nanotubes (CNTs). Polybenzimidazole-decorated CNT (PBI-CNT), a high-performance proton exchange nanostructure, was doped using phosphotungstic acid (PWA) as a super proton conductor. The engineered nanohybrid structure was shown to retain water molecules and provide high proton conduction at low humidity and elevated temperatures. The developed complex nanomaterial was then incorporated into the Nafion matrix to fabricate nanocomposite membranes. The acid-base interactions between imidazole groups of PBI and sulfonate groups of Nafion facilitate proton conductivity, especially at elevated temperatures. The improved characteristics of the membranes at the nanoscale result in enhanced fuel cell power generation capacity (386 mW cm-2) at elevated temperatures and low humidity (40% R.H.), which was found to be considerably higher than the commercial Nafion®117 membrane (73 mW cm-2). © 2013 The Royal Society of Chemistry.


Hasani-Sadrabadi M.M.,Amirkabir University of Technology | Dashtimoghadam E.,Amirkabir University of Technology | Majedi F.S.,Amirkabir University of Technology | Kabiri K.,Iran Polymer And Petrochemical Institute | And 3 more authors.
Chemical Communications | Year: 2010

This study is concerned with electrochemical investigation of novel high-performance proton exchange membranes based on bio-functionalized montmorillonite and Nafion®. It was found that the incorporation of 2 wt% BMMT into Nafion® polyelectrolyte matrix results in significantly improved methanol-air fuel cell efficiency of 30% compared to 14% for Nafion®117, and about 23-times higher membrane selectivity. © 2010 The Royal Society of Chemistry.


Hasani-Sadrabadi M.M.,Amirkabir University of Technology | Dashtimoghadam E.,Amirkabir University of Technology | Majedi F.S.,Amirkabir University of Technology | Kabiri K.,Iran Polymer And Petrochemical Institute | And 2 more authors.
Journal of Membrane Science | Year: 2010

A series of novel proton exchange membranes based on Nafion® and 2-acrylamido-2-methylpropanesulfonic acid (AMPS) modified montmorillonite (MMT) were prepared and investigated for high performance fuel cell applications. X-ray diffraction patterns revealed an exfoliated microstructure for the modified clay in the Nafion® matrices. Proton conductivity and methanol permeability results indicated that the incorporation of AMPS-modified MMT into Nafion® matrices results in considerably reduced methanol crossover while maintaining conductivity properties. Direct methanol-air single fuel cell tests revealed a cell efficiency of 20% for Nafion®/AMPS-MMT-3wt.% compared to 13.72% for Nafion®117 at 5M methanol feed, and also a higher power density of 88mWcm-2 compared to 39mWcm-2 for Nafion®117. Owing to such favorable features, fabricated Nafion®/AMPS-MMT membranes could be considered as promising polymeric electrolytes for high performance fuel cell applications. © 2010 Elsevier B.V.


Majedi F.S.,Ecole Polytechnique Federale de Lausanne | Majedi F.S.,Amirkabir University of Technology | Hasani-Sadrabadi M.M.,Ecole Polytechnique Federale de Lausanne | Hasani-Sadrabadi M.M.,Amirkabir University of Technology | And 6 more authors.
Chemical Communications | Year: 2012

A microfluidic platform is developed for the synthesis of monodisperse, 100 nm, chitosan based nanoparticles using nanogelation with ATP. The resulting nanoparticles tuned and enhanced transport and electrochemical properties of Nafion based nanocomposite membranes, which is highly favorable for fuel cell applications. This journal is © 2012 The Royal Society of Chemistry.

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