Free Volume Enhanced Proton Exchange Membranes from Sulfonated Triptycene Poly(Ether Ether Ketone)
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...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | en_US |
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Elsevier BV
2020
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| Online Access: | https://hdl.handle.net/1721.1/123895 |
| _version_ | 1811078842388840448 |
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| author | Moh, Lionel C. H. Goods, John Benjamin Kim, Yoonseob Swager, Timothy M |
| author2 | Massachusetts Institute of Technology. Department of Chemistry |
| author_facet | Massachusetts Institute of Technology. Department of Chemistry Moh, Lionel C. H. Goods, John Benjamin Kim, Yoonseob Swager, Timothy M |
| author_sort | Moh, Lionel C. H. |
| collection | MIT |
| description | 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 |
| first_indexed | 2024-09-23T11:06:16Z |
| format | Article |
| id | mit-1721.1/123895 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T11:06:16Z |
| publishDate | 2020 |
| publisher | Elsevier BV |
| record_format | dspace |
| spelling | mit-1721.1/1238952022-09-27T17:10:41Z Free Volume Enhanced Proton Exchange Membranes from Sulfonated Triptycene Poly(Ether Ether Ketone) Free volume enhanced proton exchange membranes from sulfonated triptycene poly(ether ketone) Moh, Lionel C. H. Goods, John Benjamin Kim, Yoonseob Swager, Timothy M Massachusetts Institute of Technology. Department of Chemistry Swager, Timothy M 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 2020-02-28T20:30:01Z 2020-02-28T20:30:01Z 2018-03 2017-11 Article http://purl.org/eprint/type/JournalArticle 0376-7388 https://hdl.handle.net/1721.1/123895 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. en_US http://dx.doi.org/10.1016/j.memsci.2017.11.041 Journal of Membrane Science Creative Commons Attribution-NonCommercial-NoDerivs License http://creativecommons.org/licenses/by-nc-nd/4.0/ application/pdf Elsevier BV Prof. Swager via Erja Kajosalo |
| spellingShingle | Moh, Lionel C. H. Goods, John Benjamin Kim, Yoonseob Swager, Timothy M Free Volume Enhanced Proton Exchange Membranes from Sulfonated Triptycene Poly(Ether Ether Ketone) |
| title | Free Volume Enhanced Proton Exchange Membranes from Sulfonated Triptycene Poly(Ether Ether Ketone) |
| title_full | Free Volume Enhanced Proton Exchange Membranes from Sulfonated Triptycene Poly(Ether Ether Ketone) |
| title_fullStr | Free Volume Enhanced Proton Exchange Membranes from Sulfonated Triptycene Poly(Ether Ether Ketone) |
| title_full_unstemmed | Free Volume Enhanced Proton Exchange Membranes from Sulfonated Triptycene Poly(Ether Ether Ketone) |
| title_short | Free Volume Enhanced Proton Exchange Membranes from Sulfonated Triptycene Poly(Ether Ether Ketone) |
| title_sort | free volume enhanced proton exchange membranes from sulfonated triptycene poly ether ether ketone |
| url | https://hdl.handle.net/1721.1/123895 |
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