Morphology and Cell Performance of Poly(fluorene)-based Anion Exchange Membranes for Water Electrolysis: Effect of Backbone Core Structure
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For the satisfactory ion conductivity of anion exchange membranes (AEMs), it is crucial to develop a membrane with a precisely manipulated morphology. Here, we report AEM morphology changes according to core structure in novel aryl ether–free poly(fluorene) AEMs with alkyl spacers on polymer backbones constructed via facile and gentle Suzuki cross-coupling reaction. Morphological and conformational analyses of these AEMs were undertaken using small-angle X-ray scattering and grazing-incidence wide-angle X-ray scattering. They were then compared to an AEM with different core structure. The results demonstrate that the core structures of polymer backbone significantly influence the rigidity and glass-transition temperature of the polymer.