期刊
POLYMERS
卷 11, 期 7, 页码 -出版社
MDPI
DOI: 10.3390/polym11071182
关键词
fuel cells; proton exchange membrane; polymer; polybenzimidazole; silica; nanofibers; electrospinning; proton conductivity; electrochemical impedance spectroscopy
资金
- Spanish Ministerio de Economia y Competitividad (MINECO) [ENE/2015-69203-R.]
The quest for sustainable and more efficient energy-converting devices has been the focus of researchers 0 efforts in the past decades. In this study, SiO2 nanofiber mats were fabricated through an electrospinning process and later functionalized using silane chemistry to introduce different polar groups OH (neutral), SO3H (acidic) and NH2 (basic). The modified nanofiber mats were embedded in PBI to fabricate mixed matrix membranes. The incorporation of these nanofiber mats in the PBI matrix showed an improvement in the chemical and thermal stability of the composite membranes. Proton conduction measurements show that PBI composite membranes containing nanofiber mats with basic groups showed higher proton conductivities, reaching values as high as 4 mS.cm(-1) at 200 degrees C.
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