Novel high-performance nanocomposite proton exchange membranes based on poly (ether sulfone)

Mohammad Mahdi Hasani-Sadrabadi, Erfan Dashtimoghadam, Seyed Reza Ghaffarian, Mohammad Hossein Hasani Sadrabadi, Mahdi Heidari and Homayoun Moaddel

Renewable Energy, 2010, vol. 35, issue 1, 226-231

Abstract: In the present research, proton exchange membranes based on partially sulfonated poly (ether sulfone) (S-PES) with various degrees of sulfonation were synthesized. It was found that the increasing of sulfonation degree up to 40% results in the enhancement of water uptake, ion exchange capacity and proton conductivity properties of the prepared membranes to 28.1%, 1.59 meq g−1, and 0.145 S cm−1, respectively. Afterwards, nanocomposite membranes based on S-PES (at the predetermined optimum sulfonation degree) containing various loading weights of organically treated montmorillonite (OMMT) were prepared via the solution intercalation technique. X-ray diffraction patterns revealed the exfoliated structure of OMMT in the macromolecular matrices. The S-PES nanocomposite membrane with 3.0 wt% of OMMT content showed the maximum selectivity parameter of about 520,000 S s cm−3 which is related to the high conductivity of 0.051 S cm−1 and low methanol permeability of 9.8 × 10−8 cm2 s−1. Furthermore, single cell DMFC fuel cell performance test with 4 molar methanol concentration showed a high power density (131 mW cm−2) of the nanocomposite membrane at the optimum composition (40% of sulfonation and 3.0 wt% of OMMT loading) compared to the Nafion®117 membrane (114 mW cm−2). Manufactured nanocomposite membranes thanks to their high selectivity, ease of preparation and low cost could be suggested as the ideal candidate for the direct methanol fuel cell applications.

Keywords: Polymer electrolyte membrane; Sulfonated poly (ether sulfone); Organically modified montmorillonite; Nafion; Membrane selectivity; Direct methanol fuel cell performance (search for similar items in EconPapers)
Date: 2010
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Citations: View citations in EconPapers (3)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:35:y:2010:i:1:p:226-231

DOI: 10.1016/j.renene.2009.05.026

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