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000858532 1001_ $$0P:(DE-HGF)0$$aZhao, Yue$$b0$$eCorresponding author
000858532 245__ $$aSmall angle neutron scattering study on the morphology of imidazolium-based grafted anion-conducting fuel cell membranes
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000858532 520__ $$aTwo 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.
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000858532 7001_ $$0P:(DE-HGF)0$$aYoshimura, Kimio$$b1
000858532 7001_ $$0P:(DE-HGF)0$$aYu, Hwan-Chul$$b2
000858532 7001_ $$0P:(DE-HGF)0$$aMaekawa, Yasunari$$b3
000858532 7001_ $$0P:(DE-HGF)0$$aHiroki, Akihiro$$b4
000858532 7001_ $$0P:(DE-HGF)0$$aKishiyama, Yoshihiro$$b5
000858532 7001_ $$0P:(DE-HGF)0$$aShishitani, Hideyuki$$b6
000858532 7001_ $$0P:(DE-HGF)0$$aYamaguchi, Susumu$$b7
000858532 7001_ $$0P:(DE-HGF)0$$aTanaka, Hirohisa$$b8
000858532 7001_ $$0P:(DE-HGF)0$$aKoizumi, Satoshi$$b9
000858532 7001_ $$0P:(DE-Juel1)130507$$aAppavou, Marie-Sousai$$b10
000858532 7001_ $$0P:(DE-Juel1)171614$$aHouston, Judith$$b11
000858532 7001_ $$0P:(DE-Juel1)130905$$aRadulescu, Aurel$$b12
000858532 7001_ $$0P:(DE-Juel1)130917$$aRichter, Dieter$$b13
000858532 773__ $$0PERI:(DE-600)1466579-7$$a10.1016/j.physb.2018.01.064$$gVol. 551, p. 203 - 207$$p203 - 207$$tPhysica / B Condensed matter B$$v551$$x0921-4526$$y2018
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