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Sandwich structure polymer electrolyte membranes containing phosphotungstic acid immobilized electospun nanofibers

The advances in proton exchange membranes (PEM)s is critical for improving the performance of fuel cells [1]. Membranes compromising perfluorosulfonic acid polymers such as Nafion have been used extensively due to their desired conductivity and stability. However, these materials need to be saturate...

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Main Authors:	Abouzari-lotf, E., Mehdipour-Ataei, S., Nasef, M. M., Ghassemi, H., Zakeri, M., Ahmad, A., Ripin, A.
Format:	Conference or Workshop Item
Language:	English
Published:	2015
Subjects:	TP Chemical technology
Online Access:	http://eprints.utm.my/id/eprint/63323/1/EbrahimAbouzariLotf2015_SandwichStructurePolymerElectrolyteMembranes.pdf http://eprints.utm.my/id/eprint/63323/ http://news.utm.my/2015/09/5th-international-conference-on-fuel-cell-and-hydrogen-technology/
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spelling	my.utm.633232017-05-30T03:04:47Z http://eprints.utm.my/id/eprint/63323/ Sandwich structure polymer electrolyte membranes containing phosphotungstic acid immobilized electospun nanofibers Abouzari-lotf, E. Mehdipour-Ataei, S. Nasef, M. M. Ghassemi, H. Zakeri, M. Ahmad, A. Ripin, A. TP Chemical technology The advances in proton exchange membranes (PEM)s is critical for improving the performance of fuel cells [1]. Membranes compromising perfluorosulfonic acid polymers such as Nafion have been used extensively due to their desired conductivity and stability. However, these materials need to be saturated with water to obtain practical level of proton conductivity. There is a strong demand for the PEMs to work at lower relative humidity or under anhydrous conditions because the electrochemical reactions will be accelerated and water management of fuel cell will be simpler. Various designing strategies and advanced materials have been developed to mitigate for this issue without causing serious loss in proton conductivity or stability [2]. Among all, the introducing of inorganic proton conductors such as heteropoly acids have been considered widely. Generally, HPAs (such as phosphotungstic acid H3PW12O40, PWA) have a very strong Brønsted acidity approaching the superacid region (more acidic than Nafion) [3]. In this work, high level of PWA was self-anchored onto nylon electrospun nanofiberous sheet (Figure 1b). Sandwich structured proton conducting membranes were fabricate by assembling nanofibrous central layer with outer Nafion layers (Figure 1b). Since the PWA is attached to the polymer backbones, the risk of leaching out is minimized. Moreover, the significant synthetic versatility of the method helps to increase PWA immobilization level. As shown in the Figure 1c, proton conductivity of as high as 60 mS cm-1 at 30 °C was achieved which is comparable with Nafion 115. The durability of the proton conductivity of sandwiched membrane. 2015 Conference or Workshop Item PeerReviewed application/pdf en http://eprints.utm.my/id/eprint/63323/1/EbrahimAbouzariLotf2015_SandwichStructurePolymerElectrolyteMembranes.pdf Abouzari-lotf, E. and Mehdipour-Ataei, S. and Nasef, M. M. and Ghassemi, H. and Zakeri, M. and Ahmad, A. and Ripin, A. (2015) Sandwich structure polymer electrolyte membranes containing phosphotungstic acid immobilized electospun nanofibers. In: 5th International Conference on Fuel Cell & Hydrogen Technology 2015, 1-3 Sept, 2015, Kuala Lumpur, Malaysia. http://news.utm.my/2015/09/5th-international-conference-on-fuel-cell-and-hydrogen-technology/
institution	Universiti Teknologi Malaysia
building	UTM Library
collection	Institutional Repository
continent	Asia
country	Malaysia
content_provider	Universiti Teknologi Malaysia
content_source	UTM Institutional Repository
url_provider	http://eprints.utm.my/
language	English
topic	TP Chemical technology
spellingShingle	TP Chemical technology Abouzari-lotf, E. Mehdipour-Ataei, S. Nasef, M. M. Ghassemi, H. Zakeri, M. Ahmad, A. Ripin, A. Sandwich structure polymer electrolyte membranes containing phosphotungstic acid immobilized electospun nanofibers
description	The advances in proton exchange membranes (PEM)s is critical for improving the performance of fuel cells [1]. Membranes compromising perfluorosulfonic acid polymers such as Nafion have been used extensively due to their desired conductivity and stability. However, these materials need to be saturated with water to obtain practical level of proton conductivity. There is a strong demand for the PEMs to work at lower relative humidity or under anhydrous conditions because the electrochemical reactions will be accelerated and water management of fuel cell will be simpler. Various designing strategies and advanced materials have been developed to mitigate for this issue without causing serious loss in proton conductivity or stability [2]. Among all, the introducing of inorganic proton conductors such as heteropoly acids have been considered widely. Generally, HPAs (such as phosphotungstic acid H3PW12O40, PWA) have a very strong Brønsted acidity approaching the superacid region (more acidic than Nafion) [3]. In this work, high level of PWA was self-anchored onto nylon electrospun nanofiberous sheet (Figure 1b). Sandwich structured proton conducting membranes were fabricate by assembling nanofibrous central layer with outer Nafion layers (Figure 1b). Since the PWA is attached to the polymer backbones, the risk of leaching out is minimized. Moreover, the significant synthetic versatility of the method helps to increase PWA immobilization level. As shown in the Figure 1c, proton conductivity of as high as 60 mS cm-1 at 30 °C was achieved which is comparable with Nafion 115. The durability of the proton conductivity of sandwiched membrane.
format	Conference or Workshop Item
author	Abouzari-lotf, E. Mehdipour-Ataei, S. Nasef, M. M. Ghassemi, H. Zakeri, M. Ahmad, A. Ripin, A.
author_facet	Abouzari-lotf, E. Mehdipour-Ataei, S. Nasef, M. M. Ghassemi, H. Zakeri, M. Ahmad, A. Ripin, A.
author_sort	Abouzari-lotf, E.
title	Sandwich structure polymer electrolyte membranes containing phosphotungstic acid immobilized electospun nanofibers
title_short	Sandwich structure polymer electrolyte membranes containing phosphotungstic acid immobilized electospun nanofibers
title_full	Sandwich structure polymer electrolyte membranes containing phosphotungstic acid immobilized electospun nanofibers
title_fullStr	Sandwich structure polymer electrolyte membranes containing phosphotungstic acid immobilized electospun nanofibers
title_full_unstemmed	Sandwich structure polymer electrolyte membranes containing phosphotungstic acid immobilized electospun nanofibers
title_sort	sandwich structure polymer electrolyte membranes containing phosphotungstic acid immobilized electospun nanofibers
publishDate	2015
url	http://eprints.utm.my/id/eprint/63323/1/EbrahimAbouzariLotf2015_SandwichStructurePolymerElectrolyteMembranes.pdf http://eprints.utm.my/id/eprint/63323/ http://news.utm.my/2015/09/5th-international-conference-on-fuel-cell-and-hydrogen-technology/
_version_	1643655686705381376
score	13.211869

Sandwich structure polymer electrolyte membranes containing phosphotungstic acid immobilized electospun nanofibers

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