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Article

Enhanced Ion Cluster Size of Sulfonated Poly (Arylene Ether Sulfone) for Proton Exchange Membrane Fuel Cell Application

School of Chemical Engineering, Sungkyunkwan University, Suwon 440-746, Gyeonggi, Korea
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Author to whom correspondence should be addressed.
Academic Editor: Jong Yeob Jeon
Polymers 2021, 13(7), 1111; https://doi.org/10.3390/polym13071111
Received: 27 February 2021 / Revised: 26 March 2021 / Accepted: 26 March 2021 / Published: 31 March 2021
(This article belongs to the Special Issue Polymer Membranes for Energy Applications)
A successful approach towards enhancement in ion cluster size of sulfonated poly (arylene ether sulfone) (SPAES)-based membranes has been successfully carried out by encapsulating basic pendent branches as side groups. Modified SPAES was synthesized by condensation polymerization followed by bromination with N-bromosuccinamide (NBS) and sulfonation by ring opening reaction. Various molar ratios of branched polyethyleneimine (PEI) were added to the SPAES and the developed polymer was designated as SPAES-x-PEI-y, where x denoted the number of sulfonating acid group per polymer chain and y represents the amount of PEI concentration. Polymer synthesis was characterized by 1H-NMR (Nuclear magnetic resonance) and FT-IR (Fourier-transform infrared spectroscopy) analysis. A cumulative trend involving enhanced proton conductivity of the membranes with an increase in the molar ratio of PEI has been observed, clearly demonstrating the formation of ionic clusters. SPAES-140-PEI-3 membranes show improved proton conductivity of 0.12 Scm−1 at 80 °C. Excellent chemical stability was demonstrated by the polymer with Fenton’s test at 80 °C for 24 h without significant loss in proton conductivity, owing to the suitability of the synthesized hybrid membrane for electrochemical application. Moreover, a single cell degradation test was conducted at 80 °C showing a power density at a 140 mWcm−2 value, proving the stable nature of synthesized membranes for proton exchange membrane fuel cell application. View Full-Text
Keywords: PEMFC (proton exchange membrane fuel cell); acid-base; hybrid membrane; proton conductivity); ion cluster; impedance spectroscopy PEMFC (proton exchange membrane fuel cell); acid-base; hybrid membrane; proton conductivity); ion cluster; impedance spectroscopy
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MDPI and ACS Style

Sharma, P.P.; Tinh, V.D.C.; Kim, D. Enhanced Ion Cluster Size of Sulfonated Poly (Arylene Ether Sulfone) for Proton Exchange Membrane Fuel Cell Application. Polymers 2021, 13, 1111. https://doi.org/10.3390/polym13071111

AMA Style

Sharma PP, Tinh VDC, Kim D. Enhanced Ion Cluster Size of Sulfonated Poly (Arylene Ether Sulfone) for Proton Exchange Membrane Fuel Cell Application. Polymers. 2021; 13(7):1111. https://doi.org/10.3390/polym13071111

Chicago/Turabian Style

Sharma, Prem P., Vo D.C. Tinh, and Dukjoon Kim. 2021. "Enhanced Ion Cluster Size of Sulfonated Poly (Arylene Ether Sulfone) for Proton Exchange Membrane Fuel Cell Application" Polymers 13, no. 7: 1111. https://doi.org/10.3390/polym13071111

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