{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,3]],"date-time":"2026-09-03T10:25:38Z","timestamp":1788431138487,"version":"build-2803163510"},"reference-count":34,"publisher":"MDPI AG","issue":"3","license":[{"start":{"date-parts":[[2016,2,29]],"date-time":"2016-02-29T00:00:00Z","timestamp":1456704000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"National Science Fundation","award":["EFRI-1038234"],"award-info":[{"award-number":["EFRI-1038234"]}]},{"name":"DOE ARPA-E","award":["DE-AR0000262"],"award-info":[{"award-number":["DE-AR0000262"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Materials"],"abstract":"<jats:p>The regenerative H2\/Br2-HBr fuel cell, utilizing an oxidant solution of Br2 in aqueous HBr, shows a number of benefits for grid-scale electricity storage. The membrane-electrode assembly, a key component of a fuel cell, contains a proton-conducting membrane, typically based on the perfluorosulfonic acid (PFSA) ionomer. Unfortunately, the high cost of PFSA membranes and their relatively high bromine crossover are serious drawbacks. Nanofiber composite membranes can overcome these limitations. In this work, composite membranes were prepared from electrospun dual-fiber mats containing Nafion\u00ae PFSA ionomer for facile proton transport and an uncharged polymer, polyphenylsulfone (PPSU), for mechanical reinforcement, and swelling control. After electrospinning, Nafion\/PPSU mats were converted into composite membranes by softening the PPSU fibers, through exposure to chloroform vapor, thus filling the voids between ionomer nanofibers. It was demonstrated that the relative membrane selectivity, referenced to Nafion\u00ae 115, increased with increasing PPSU content, e.g., a selectivity of 11 at 25 vol% of Nafion fibers. H2-Br2 fuel cell power output with a 65 \u03bcm thick membrane containing 55 vol% Nafion fibers was somewhat better than that of a 150 \u03bcm Nafion\u00ae 115 reference, but its cost advantage due to a four-fold decrease in PFSA content and a lower bromine species crossover make it an attractive candidate for use in H2\/Br2-HBr systems.<\/jats:p>","DOI":"10.3390\/ma9030143","type":"journal-article","created":{"date-parts":[[2016,2,29]],"date-time":"2016-02-29T10:55:59Z","timestamp":1456743359000},"page":"143","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":32,"title":["Electrospun Nafion\u00ae\/Polyphenylsulfone Composite Membranes for Regenerative Hydrogen Bromine Fuel Cells"],"prefix":"10.3390","volume":"9","author":[{"given":"Jun","family":"Park","sequence":"first","affiliation":[{"name":"Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, TN 37235, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2754-0720","authenticated-orcid":false,"given":"Ryszard","family":"Wycisk","sequence":"additional","affiliation":[{"name":"Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, TN 37235, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5115-7276","authenticated-orcid":false,"given":"Peter","family":"Pintauro","sequence":"additional","affiliation":[{"name":"Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, TN 37235, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Venkata","family":"Yarlagadda","sequence":"additional","affiliation":[{"name":"Department of Chemical and Petroleum Engineering, University of Kansas, Lawrence, KS 66045, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Trung","family":"Van Nguyen","sequence":"additional","affiliation":[{"name":"Department of Chemical and Petroleum Engineering, University of Kansas, Lawrence, KS 66045, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2016,2,29]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1358","DOI":"10.1016\/j.elecom.2006.06.021","article-title":"High-power H2\/Br2 fuel cell","volume":"8","author":"Livshits","year":"2006","journal-title":"Electrochem. 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