Journal
SOLID STATE IONICS
Volume 349, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.ssi.2020.115300
Keywords
Nanofiber; Protuberance structure; Proton exchange membrane; SPES; Electrospinning
Categories
Funding
- National Key Technology RD Program [2016YFB0303300]
- National Natural Science Foundation of China [51603148]
- Science and Technology Plans of Tianjin [17JCYBJC17200]
- China Postdoctoral Fund [2018M632618]
- Qingdao Postdoctoral Fund [RZ1900009920]
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Nanofibers have been widely used for the construction of proton channels in proton exchange membranes (PEMs), and the optimization and control of proton channels have become a focus in this research area. In this work, we design and fabricate optimized and efficient proton transport channels in PEMs by introducing of sulfonated poly (ether sulfone) nanofiber with amino-modified SiO2 protuberance structures. The protuberance structures improve the strong interactions between the functional groups of nanofibers and matrix, resulting in an increased density of proton-conducting sites and improvement in membrane properties. Notably, Nafion/SPES/SiO2-3% possesses a low methanol permeability of 7.22 x 10(-7) CM2 S-1 and a high proton conductivity of 0.23 S cm(-1) at 80 degrees C in water. Consequently, the Nafion/SPES/SiO2 membrane demonstrates a maximum power density of 77.22 mW cm(-2) in a direct methanol fuel cell test system, which is 42.34% higher compared to the value of Nafion membrane (54.25 mW cm(-2)). This study successfully explores the preparation route of nanofiber with protuberance structures successfully, and highlights the potential benefits of this novel nanofiber structure in the PEM field.
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