This title appears in the Scientific Report :
2018
Please use the identifier:
http://dx.doi.org/10.1016/j.physb.2018.01.064 in citations.
Small angle neutron scattering study on the morphology of imidazolium-based grafted anion-conducting fuel cell membranes
Small angle neutron scattering study on the morphology of imidazolium-based grafted anion-conducting fuel cell membranes
Two imidazolium based graft-type of anion-conducting electrolyte membranes (AEMs) for fuel cells with a moderate ion exchange capacity of ∼1.0 mmol/g were successfully prepared by radiation-induced grafting to introduce imidazolium and styrene units into a poly(ethylene-co-tetrafluoroethylene) (ETFE...
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Personal Name(s): | Zhao, Yue (Corresponding author) |
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Yoshimura, Kimio / Yu, Hwan-Chul / Maekawa, Yasunari / Hiroki, Akihiro / Kishiyama, Yoshihiro / Shishitani, Hideyuki / Yamaguchi, Susumu / Tanaka, Hirohisa / Koizumi, Satoshi / Appavou, Marie-Sousai / Houston, Judith / Radulescu, Aurel / Richter, Dieter | |
Contributing Institute: |
Streumethoden; JCNS-2 Neutronenstreuung; JCNS-1 JCNS-FRM-II; JCNS-FRM-II |
Published in: | Physica / B Condensed matter B, 551 (2018) S. 203 - 207 |
Imprint: |
Amsterdam
Elsevier
2018
|
DOI: |
10.1016/j.physb.2018.01.064 |
Document Type: |
Journal Article |
Research Program: |
Jülich Centre for Neutron Research (JCNS) FRM II / MLZ |
Subject (ZB): | |
Publikationsportal JuSER |
Two imidazolium based graft-type of anion-conducting electrolyte membranes (AEMs) for fuel cells with a moderate ion exchange capacity of ∼1.0 mmol/g were successfully prepared by radiation-induced grafting to introduce imidazolium and styrene units into a poly(ethylene-co-tetrafluoroethylene) (ETFE) base film. Though imidazolium groups were desired to connect with styrene groups via two different ways, i.e. parallel or perpendicular orientations to the graft-polymer chains via copolymerization (AEM1) or homo-polymerization (AEM2), both AEMs possess high ion conductivity (>100 mS/cm at 60 °C) and modest stability. The morphologies of these membranes were elucidated by small-angle neutron scattering method. Our results revealed that 1) both AEMs show clear microphase separation with a length scale of 30–40 nm, and the semi-crystalline structural feature of the hydrophobic microdomains contributes to the membrane mechanical property; 2) at the length scale <6 nm, ionic structures of the two AEMs are different: Parallel type of AEM1 shows a homogeneous distribution of ions in the ion channel; while perpendicular type of AEM2 shows ionic clusters nanophase-separated from the graft polymers. |