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dc.contributor.authorSun, Shipeng
dc.contributor.authorLing, Li
dc.contributor.authorXiong, Yong
dc.contributor.authorZhang, Yun
dc.contributor.authorLi, Zhen
dc.date.accessioned2020-07-14T09:29:17Z
dc.date.available2020-07-14T09:29:17Z
dc.date.issued2020-06-27
dc.date.submitted2019-12-02
dc.identifier.citationSun, S., Ling, L., Xiong, Y., Zhang, Y., & Li, Z. (2020). Trifluoromethanesulfonimide-based hygroscopic semi-interpenetrating polymer network for enhanced proton conductivity of nafion-based proton exchange membranes at low humidity. Journal of Membrane Science, 612, 118339. doi:10.1016/j.memsci.2020.118339
dc.identifier.issn1873-3123
dc.identifier.issn0376-7388
dc.identifier.doi10.1016/j.memsci.2020.118339
dc.identifier.urihttp://hdl.handle.net/10754/664167
dc.description.abstractIn this study, a super acid with impressive hygroscopicity, 1-[3-(methacryloyloxy)propylsulfonyl]-1-(trifluoromethanesulfonyl)imide (MPTI), is exploited to improve the proton conductivity of PEMs at low humidity. Importantly, MPTI can deliquesce into an aqueous solution by capturing moisture from air at a considerable rate. Investigation of the hygroscopicity of MPTI and the corresponding mechanism by molecular dynamics simulation show a total interaction energy between MPTI and water of −368.13 kJ mol−1, which greatly exceeds those of model derivatives with other typical hygroscopic groups. To apply MPTI in PEMs and prevent leakage, MPTI is incorporated into a semi-interpenetrating polymer network via in situ polymerization, and Nafion-based composite membranes are fabricated. The water uptake of the obtained hybrid membranes is substantially increased by up to 66.61% at 40% RH and 90.04% at 95% RH. This optimization of the water environment facilitates the dissociation of protons and the formation of hydrogen bond networks for high-speed proton conduction. As a result, the proton conductivity of the membranes increases by up to two orders of magnitude at low humidity. Notably, this composite membrane enhanced the performance of a single fuel cell at 60% RH by 41.9%.
dc.description.sponsorshipWe are grateful for support from the Tsinghua University Initiative Scientific Research Program (52302300119). In addition, we thank Dr. Ying Li at the Tsinghua University Branch of China National Center for Protein Sciences (Beijing) for technical assistance with preparing the ultramicrocuts. We also thank HEOWNS Biochem Technologies LLC for customizing MPTI.
dc.publisherElsevier BV
dc.relation.urlhttps://linkinghub.elsevier.com/retrieve/pii/S0376738820309170
dc.rightsNOTICE: this is the author’s version of a work that was accepted for publication in Journal of Membrane Science. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Journal of Membrane Science, [612, , (2020-06-27)] DOI: 10.1016/j.memsci.2020.118339 . © 2020. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
dc.titleTrifluoromethanesulfonimide-based hygroscopic semi-interpenetrating polymer network for enhanced proton conductivity of nafion-based proton exchange membranes at low humidity
dc.typeArticle
dc.contributor.departmentAdvanced Membranes and Porous Materials Research Center
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalJournal of Membrane Science
dc.eprint.versionPost-print
dc.contributor.institutionSchool of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China
dc.contributor.institutionChinese Academy Science, Institute of Chemistry, Beijing, 100190, China
dc.identifier.volume612
dc.identifier.pages118339
kaust.personLi, Zhen
dc.date.accepted2020-05-31
dc.identifier.eid2-s2.0-85087367276
refterms.dateFOA2020-07-19T06:37:01Z
dc.date.published-online2020-06-27
dc.date.published-print2020-10


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