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Electrochemical performance and alkaline stability of cross-linked quaternized polyepichlorohydrin/PvDF blends for anion-exchange membrane fuel cells

AuthorsSimari, Cataldo; Lufrano, Ernestino; Lemes Pacheco, Giovanni ; Lázaro Elorri, María Jesús ; Sebastián del Río, David ; Nicotera, Isabella
KeywordsAnion exchange membrane
Fuell cells
Quaternized poly epichlorohydrin
Polyvinylidene fluoride
Issue Date4-Mar-2021
PublisherACS Publications
CitationJournal of Physical Chemistry C 125(10): 5494-5504 (2021)
AbstractIn the pursuit of good performing, low cost, and scalable anion-exchange membranes (AEM), a series of blended electrolytes based on cross-linked quaternized poly epichlorohydrin (qPECH) and polyvinylidene fluoride (PvDF) were prepared to evaluate their suitability for AEM fuel cell application. The thermo-mechanical and swelling analyses revealed that the blending of these two macromolecules produces robust and heat-resistant microphase-segregated membranes with good dimensional stability. By varying the blend ratio, the ion-exchange capacity (IEC) and transport properties of the resulting membrane can be easily adjusted and optimized with clear impact on its electrochemical performance. At 67:33 wt % blend ratio, high hydroxide conductivity (i.e., 56.3 mS cm–1 at 80 °C) and quite reasonable alkaline stability were achieved. The single H2–O2 fuel cell using the qP-67 membrane yielded a beginning-of-life maximum power density of 32 mW cm–2 and an open circuit voltage (OCV) of 1.03 V at 50 °C without optimization. These preliminary results demonstrate that qPECH/PvDF blended membranes can be potentially applied in AEMFCs.
Description12 figures, 4 tables.--This document is the Accepted Manuscript version of a Published Work that appeared in final form in Journal of Physical Chemistry C, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see http://dx.doi.org/10.1021/acs.jpcc.0c11346
Publisher version (URL)http://dx.doi.org/10.1021/acs.jpcc.0c11346
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