Cover Image

Phase separated nanofibrous anion exchange membranes with polycationic side chains

Anion exchange membranes (AEMs) have gained significant interest in electrochemical energy devices with a unique set of benefits. However, none of the commercial AEMs behave ideally under alkaline operation conditions and developing appropriate membranes is one of the major hurdles to the durability...

Full description

Saved in:
Bibliographic Details
Main Authors: Abouzari-Lotf, E., Ghassemi, H., Nasef, M.M., Ahmad, A., Zakeri, M., Ting, T.M., Abbasi, A., Mehdipour-Ataei, S.
Format: Article
Published: Royal Society of Chemistry 2017
Online Access:https://www.scopus.com/inward/record.uri?eid=2-s2.0-85026247075&doi=10.1039%2fc7ta03967k&partnerID=40&md5=2aca34d424189afa6b113a4c19f62a6d
http://eprints.utp.edu.my/19881/
Tags: Add Tag
No Tags, Be the first to tag this record!
id my.utp.eprints.19881
record_format eprints
spelling my.utp.eprints.198812018-04-22T13:13:20Z Phase separated nanofibrous anion exchange membranes with polycationic side chains Abouzari-Lotf, E. Ghassemi, H. Nasef, M.M. Ahmad, A. Zakeri, M. Ting, T.M. Abbasi, A. Mehdipour-Ataei, S. Anion exchange membranes (AEMs) have gained significant interest in electrochemical energy devices with a unique set of benefits. However, none of the commercial AEMs behave ideally under alkaline operation conditions and developing appropriate membranes is one of the major hurdles to the durability and performance of anion exchange membrane fuel cells. Here we demonstrate a simple and efficient strategy of using nanofibrous materials, activated by radiation and functionalized with ionic groups to fabricate highly durable and conductive membranes with polycationic side chains. Two series of AEMs were prepared by radiation induced emulsion grafting of vinylbenzyl chloride onto syndiotactic polypropylene and nylon-66 nanofibrous sheets followed by crosslinking and introducing quaternary ammonium groups. A strong correlation was found between the choice of nanofibrous substrate as well as crosslinking degrees with water uptake, ion conductivity and stability of the membranes. A well-developed phase separated morphology was confirmed and the membranes with ion exchange capacities of 1.6-2.1 mmol g-1 showed high ionic conductivity, low methanol permeability and excellent alkaline stability. A hydroxide ion conductivity as high as 132 mS cm-1 was achieved at 80 °C and it was exceptionally retained at up to 90 after evaluation by accelerated degradation testing in 1 M NaOH at 80 °C for 672 h. A Pt-catalyzed fuel cell using these nanofibrous composite membranes showed a peak power density of above 120 mW cm-2 at 80 °C under 90 relative humidity. This strategy and observed properties pave the way for highly conductive and durable ion conducting membranes with tunable characteristics. © 2017 The Royal Society of Chemistry. Royal Society of Chemistry 2017 Article PeerReviewed https://www.scopus.com/inward/record.uri?eid=2-s2.0-85026247075&doi=10.1039%2fc7ta03967k&partnerID=40&md5=2aca34d424189afa6b113a4c19f62a6d Abouzari-Lotf, E. and Ghassemi, H. and Nasef, M.M. and Ahmad, A. and Zakeri, M. and Ting, T.M. and Abbasi, A. and Mehdipour-Ataei, S. (2017) Phase separated nanofibrous anion exchange membranes with polycationic side chains. Journal of Materials Chemistry A, 5 (29). pp. 15326-15341. http://eprints.utp.edu.my/19881/
institution Universiti Teknologi Petronas
building UTP Resource Centre
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Petronas
content_source UTP Institutional Repository
url_provider http://eprints.utp.edu.my/
description Anion exchange membranes (AEMs) have gained significant interest in electrochemical energy devices with a unique set of benefits. However, none of the commercial AEMs behave ideally under alkaline operation conditions and developing appropriate membranes is one of the major hurdles to the durability and performance of anion exchange membrane fuel cells. Here we demonstrate a simple and efficient strategy of using nanofibrous materials, activated by radiation and functionalized with ionic groups to fabricate highly durable and conductive membranes with polycationic side chains. Two series of AEMs were prepared by radiation induced emulsion grafting of vinylbenzyl chloride onto syndiotactic polypropylene and nylon-66 nanofibrous sheets followed by crosslinking and introducing quaternary ammonium groups. A strong correlation was found between the choice of nanofibrous substrate as well as crosslinking degrees with water uptake, ion conductivity and stability of the membranes. A well-developed phase separated morphology was confirmed and the membranes with ion exchange capacities of 1.6-2.1 mmol g-1 showed high ionic conductivity, low methanol permeability and excellent alkaline stability. A hydroxide ion conductivity as high as 132 mS cm-1 was achieved at 80 °C and it was exceptionally retained at up to 90 after evaluation by accelerated degradation testing in 1 M NaOH at 80 °C for 672 h. A Pt-catalyzed fuel cell using these nanofibrous composite membranes showed a peak power density of above 120 mW cm-2 at 80 °C under 90 relative humidity. This strategy and observed properties pave the way for highly conductive and durable ion conducting membranes with tunable characteristics. © 2017 The Royal Society of Chemistry.
format Article
author Abouzari-Lotf, E.
Ghassemi, H.
Nasef, M.M.
Ahmad, A.
Zakeri, M.
Ting, T.M.
Abbasi, A.
Mehdipour-Ataei, S.
spellingShingle Abouzari-Lotf, E.
Ghassemi, H.
Nasef, M.M.
Ahmad, A.
Zakeri, M.
Ting, T.M.
Abbasi, A.
Mehdipour-Ataei, S.
Phase separated nanofibrous anion exchange membranes with polycationic side chains
author_facet Abouzari-Lotf, E.
Ghassemi, H.
Nasef, M.M.
Ahmad, A.
Zakeri, M.
Ting, T.M.
Abbasi, A.
Mehdipour-Ataei, S.
author_sort Abouzari-Lotf, E.
title Phase separated nanofibrous anion exchange membranes with polycationic side chains
title_short Phase separated nanofibrous anion exchange membranes with polycationic side chains
title_full Phase separated nanofibrous anion exchange membranes with polycationic side chains
title_fullStr Phase separated nanofibrous anion exchange membranes with polycationic side chains
title_full_unstemmed Phase separated nanofibrous anion exchange membranes with polycationic side chains
title_sort phase separated nanofibrous anion exchange membranes with polycationic side chains
publisher Royal Society of Chemistry
publishDate 2017
url https://www.scopus.com/inward/record.uri?eid=2-s2.0-85026247075&doi=10.1039%2fc7ta03967k&partnerID=40&md5=2aca34d424189afa6b113a4c19f62a6d
http://eprints.utp.edu.my/19881/
_version_ 1738656132542496768
score 13.211869

Similar Items