Free Volume Enhanced Proton Exchange Membranes from Sulfonated Triptycene Poly(Ether Ether Ketone)
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ManuScriptForPEMFCtoJMemSci-Revised-20171113.pdf
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Author(s)
Moh, Lionel C. H.
Goods, John Benjamin
Kim, Yoonseob
Swager, Timothy M
Alternative Title
Free volume enhanced proton exchange membranes from sulfonated triptycene poly(ether ketone)
Date Issued
March 2018
Journal
Journal of Membrane Science
Publisher
Elsevier BV
Citation
Moh, Lionel C.H. et al. "Free volume enhanced proton exchange membranes from sulfonated triptycene poly(ether ketone)." Journal of Membrane Science, 549 (March 2018): 236-243.
Version
Author's final manuscript
Abstract
A triptycene based poly(ether ketone) (tripPEEK) was synthesized and sulfonated to form proton exchange membranes. The increase in intrinsic free volume resulting from the incorporation of sterically bulky triptycene moiety, imparts high affinity to water at all levels of relative humidity (RH) from 10% RH to 90% RH. S-tripPEEK membranes showed proton conductivities of 334 mS/cm at 85 °C at 90% RH and 0.37 mS/cm at 85 °C at 20% RH. Membranes of similar ion exchange capacity (IEC) are compared to deconvolute the effect of free volume from IEC in enhancing proton conductivity. Increasing the free volume of the membranes increases the proton conductivity and decreases the activation energy for proton conduction between 10% RH to 90% RH. Keyword: PEMFC; Proton exchange membrane; Sulfonated PEEK; Free volume; Triptycene
MIT Department
Massachusetts Institute of Technology. Department of Chemistry
Terms of Use
Creative Commons Attribution-NonCommercial-NoDerivs License
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DOI of Published Version
https://doi.org/10.1016/j.memsci.2017.11.041
