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Article

New Insights into Properties of Methanol Transport in Sulfonated Polysulfone Composite Membranes for Direct Methanol Fuel Cells

1
Department of Chemistry and Chemical Technologies, University of Calabria, 87036 Arcavacata di Rende (CS), Italy
2
CNR-ITAE, Istituto di Tecnologie Avanzate per l’Energia “Nicola Giordano”, Via Salita S. Lucia sopra Contesse n., 5-98126 S. Lucia-Messina, Italy
*
Authors to whom correspondence should be addressed.
Academic Editor: Dong Jin Yoo
Polymers 2021, 13(9), 1386; https://doi.org/10.3390/polym13091386
Received: 26 March 2021 / Revised: 20 April 2021 / Accepted: 22 April 2021 / Published: 24 April 2021
(This article belongs to the Special Issue Advanced Functional Polymers for Energy Applications)
Methanol crossover through a polymer electrolyte membrane has numerous negative effects on direct methanol fuel cells (DMFCs) because it decreases the cell voltage due to a mixed potential (occurrence of both oxygen reduction and methanol oxidation reactions) at the cathode, lowers the overall fuel utilization and contributes to long-term membrane degradation. In this work, an investigation of methanol transport properties of composite membranes based on sulfonated polysulfone (sPSf) and modified silica filler is carried out using the PFG-NMR technique, mainly focusing on high methanol concentration (i.e., 5 M). The influence of methanol crossover on the performance of DMFCs equipped with low-cost sPSf-based membranes operating with 5 M methanol solution at the anode is studied, with particular emphasis on the composite membrane approach. Using a surface-modified-silica filler into composite membranes based on sPSf allows reducing methanol cross-over of 50% compared with the pristine membrane, making it a good candidate to be used as polymer electrolyte for high energy DMFCs. View Full-Text
Keywords: direct methanol fuel cells; PFG-NMR; sulfonated polysulfone; methanol crossover; acidic silica direct methanol fuel cells; PFG-NMR; sulfonated polysulfone; methanol crossover; acidic silica
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MDPI and ACS Style

Simari, C.; Nicotera, I.; Aricò, A.S.; Baglio, V.; Lufrano, F. New Insights into Properties of Methanol Transport in Sulfonated Polysulfone Composite Membranes for Direct Methanol Fuel Cells. Polymers 2021, 13, 1386. https://doi.org/10.3390/polym13091386

AMA Style

Simari C, Nicotera I, Aricò AS, Baglio V, Lufrano F. New Insights into Properties of Methanol Transport in Sulfonated Polysulfone Composite Membranes for Direct Methanol Fuel Cells. Polymers. 2021; 13(9):1386. https://doi.org/10.3390/polym13091386

Chicago/Turabian Style

Simari, Cataldo, Isabella Nicotera, Antonino Salvatore Aricò, Vincenzo Baglio, and Francesco Lufrano. 2021. "New Insights into Properties of Methanol Transport in Sulfonated Polysulfone Composite Membranes for Direct Methanol Fuel Cells" Polymers 13, no. 9: 1386. https://doi.org/10.3390/polym13091386

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