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@ARTICLE{Zhao:862698,
author = {Zhao, Yue and Yoshimura, Kimio and Takamatsu, Harufumi and
Hiroki, Akihiro and Kishiyama, Yoshihiro and Shishitani,
Hideyuki and Yamaguchi, Susumu and Tanaka, Hirohisa and
Koizumi, Satoshi and Radulescu, Aurel and Appavou,
Marie-Sousai and Maekawa, Yasunari},
title = {{I}midazolium-{B}ased {A}nion {E}xchange {M}embranes for
{A}lkaline {A}nion {F}uel {C}ells: {I}nterplay between
{M}orphology and {A}nion {T}ransport {B}ehavior},
journal = {Journal of the Electrochemical Society},
volume = {166},
number = {8},
issn = {1945-7111},
address = {Pennington, NJ},
publisher = {Electrochemical Soc.},
reportid = {FZJ-2019-02949},
pages = {F472 - F478},
year = {2019},
abstract = {We studied anion transport behaviors in grafted anion
exchange membranes (AEMs) composed of
2-methyl-N-vinylimidazole (Im) and styrene (St) having
various Im/St ratios (6/4, 4/6, and 3/7) grafted onto
poly(ethylene-co-tetrafluoroethylene) films (named AEM64,
AEM46, and AEM37). The transport properties were evaluated
based on the transport efficiency defined as ratios of anion
diffusion coefficients in AEMs to dilution solutions (D/D0)
and were correlated to the morphology of AEMs analyzed by
the small angle scattering method. We found a master curve
of D/D0 with hydration for AEM64, regardless of the grafting
degree and anion species; however, D/D0 for AEM46 and AEM37
was similar with AEM64 at low hydration conditions, but
clearly deviated down from it at high hydration conditions.
Such difference could be elucidated by the membrane
morphology. For AEM64, the conducting phase was homogeneous
comprised dispersed ions, and the conductivity correlated
well with the increasing hydration. In contrast, when the
styrene content increased (i.e., AEM46 and AEM37), the
conducting phase changed to heterogeneous with water puddles
separated from dispersed ions, and the anion transport was
suppressed. Results in this work gave a mechanistic insight
in the anion transport properties in proximity of the AEM
morphology at various hydration conditions.},
cin = {JCNS-FRM-II / JCNS-1 / MLZ},
ddc = {660},
cid = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
I:(DE-Juel1)JCNS-1-20110106 / I:(DE-588b)4597118-3},
pnm = {6G4 - Jülich Centre for Neutron Research (JCNS) (POF3-623)
/ 6G15 - FRM II / MLZ (POF3-6G15)},
pid = {G:(DE-HGF)POF3-6G4 / G:(DE-HGF)POF3-6G15},
experiment = {EXP:(DE-MLZ)External-20140101},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000466278400002},
doi = {10.1149/2.0431908jes},
url = {https://juser.fz-juelich.de/record/862698},
}