Journal
JOURNAL OF PHYSICAL CHEMISTRY C
Volume 125, Issue 10, Pages 5494-5504Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpcc.0c11346
Keywords
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Funding
- Italian Ministry of Education, Universities and Research (MIUR) by the AIM Project: Attraction and International Mobility (PON RI 2014-2020) [AIM1899391-2]
- Gobierno de Aragon (DGA) [T06_17R]
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Blended membranes based on qPECH and PvDF exhibit adjustable ion-exchange capacity and transport properties, showing promising potential for applications in gas fuel cells.
In 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 degrees C) and quite reasonable alkaline stability were achieved. The single H-2-O-2 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 degrees C without optimization. These preliminary results demonstrate that qPECH/PvDF blended membranes can be potentially applied in AEMFCs.
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