Oriented MOF-polymer Composite Nanofiber Membranes for High Proton Conductivity at High Temperature and Anhydrous Condition

Abstract

The novel oriented electrospun nanofiber membrane composed of MOFs and SPPESK has been synthesized for proton exchange membrane fuel cell operating at high temperature and anhydrous conditions. It is clear that the oriented nanofiber membrane displays the higher proton conductivity than that of the disordered nanofiber membrane or the membrane prepared by conventional solvent-casting method (without nanofibers). Nanofibers within the membranes are significantly oriented. The proton conductivity of the oriented nanofiber membrane can reach up to (8.2 ± 0.16) × 10−2 S cm−1 at 160°C under anhydrous condition for the highly orientation of nanofibers. Moreover, the oxidative stability and resistance of methanol permeability of the nanofibers membrane are obviously improved with an increase in orientation of nanofibers. The observed methanol permeability of 0.707 × 10−7 cm2 s−1 is about 6% of Nafion-115. Consequently, orientated nanofibers membrane is proved to be a promising material as the proton exchange membrane for potential application in direct methanol fuel cells.

Effect of spinning condition and fiber alignment on performance of ionic polymer gel actuators with nanofiber mat electrodes

“…Previous reports suggest that nanofiber mat conductivity can be controlled using the orientation of the nanofibers [18]. An aligned nanofiber mat can be obtained through the electro-spinning method by using a rotating collector [19].…”

Conductivity of composite membrane-based poly(ether-ether-ketone) sulfonated (SPEEK) nanofiber mats of varying thickness

“…[34][35][36][37][38][39][40][41][42][43] In this sense, electrospun nanobers are receiving considerable attention in the fabrication of novel proton exchange membranes with enhanced mechanical, chemical and proton conductivities [36][37][38][39][40][41] where the conduction mechanism can occur more efficiently through the surface of the nanobers.…”

Metal–organic framework–graphene oxide composites: a facile method to highly improve the proton conductivity of PEMs operated under low humidity

“…Besides, new peaks at 3137, 2960-2860 cm -1 attributed to C-H of ZIF-8 appear in the spectrum of ZIF-8@GO, so as the peak at 1581 cm -1 assigned to C=N of imidazole ring in ZIF-8 37 . Moreover, new absorbance at 754 and 688 cm -1 corresponding to Zn-O and Zn-N respectively emerges, further confirming the growth of ZIF-8 on GO sheet 38 . Fig.…”