Dual sulfonated poly(arylene ether ketone) membrane grafted with 15-crown-5-ether for enhanced proton conductivity and anti-oxidation stability

2019 ◽  
Vol 4 (4) ◽  
pp. 901-911 ◽  
Author(s):  
Dinh Cong Tinh Vo ◽  
Minh Dat Thinh Nguyen ◽  
Dukjoon Kim
Keyword(s):  
Fuel Cell ◽  
Proton Conductivity ◽  
Proton Exchange Membrane ◽  
Oxidation Stability ◽  
Critical Issue ◽  
Proton Exchange ◽  
Arylene Ether ◽  
Ether Ketone ◽  
Exchange Membrane ◽  
Sulfonated Poly

In the proton exchange membrane fuel cell, durability has recently been the critical issue in its operation.

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

Polymers ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 1111
Author(s):  
Prem P. Sharma ◽  
Vo Dinh Cong Tinh ◽  
Dukjoon Kim
Keyword(s):  
Fuel Cell ◽  
Proton Conductivity ◽  
Cluster Size ◽  
Proton Exchange Membrane ◽  
Proton Exchange ◽  
Arylene Ether ◽  
Fuel Cell Application ◽  
Exchange Membrane ◽  
Sulfonated Poly ◽  
Ion Cluster

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.

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