Pore-Size-Tuned Graphene Oxide Frameworks as Ion-Selective and Protective Layers on Hydrocarbon Membranes for Vanadium Redox-Flow Batteries

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dc.contributor.authorKim, Soohyunko
dc.contributor.authorChoi, Junghoonko
dc.contributor.authorChoi, Chanyongko
dc.contributor.authorHeo, Jiyunko
dc.contributor.authorKim, Dae Wooko
dc.contributor.authorLee, Jang Yongko
dc.contributor.authorHong, Young Taikko
dc.contributor.authorJung, Hee-Taeko
dc.contributor.authorKim, Hee-Takko
dc.date.accessioned2018-07-24T02:39:26Z-
dc.date.available2018-07-24T02:39:26Z-
dc.date.created2018-07-10-
dc.date.created2018-07-10-
dc.date.created2018-07-10-
dc.date.issued2018-06-
dc.identifier.citationNANO LETTERS, v.18, no.6, pp.3962 - 3968-
dc.identifier.issn1530-6984-
dc.identifier.urihttp://hdl.handle.net/10203/244301-
dc.description.abstractThe laminated structure of graphene oxide (GO) membranes provides exceptional ion-separation properties due to the regular interlayer spacing (d) between laminate layers. However, a larger effective pore size of the laminate immersed in water (similar to 11.1 angstrom) than the hydrated diameter of vanadium ions (>6.0 angstrom) prevents its use in vanadium redox-flow batteries (VRFB). In this work, we report an ion-selective graphene oxide framework (GOF) with a d tuned by cross-linking the GO nanosheets. Its effective pore size (similar to 5.9 angstrom) excludes vanadium ions by size but allows proton conduction. The GOF membrane is employed as a protective layer to address the poor chemical stability of sulfonated poly(arylene ether sulfone) (SPAES) membranes against VO2+ in VRFB. By effectively blocking vanadium ions, the GOF/SPAES membrane exhibits vanadium-ion permeability 4.2 times lower and a durability 5 times longer than that of the pristine SPAES membrane. Moreover, the VRFB with the GOF/SPAES membrane achieves an energy efficiency of 89% at 80 mA cm(-2) and a capacity retention of 88% even after 400 cycles, far exceeding results for Nafion 115 and demonstrating its practical applicability for VRFB.-
dc.languageEnglish-
dc.publisherAMER CHEMICAL SOC-
dc.titlePore-Size-Tuned Graphene Oxide Frameworks as Ion-Selective and Protective Layers on Hydrocarbon Membranes for Vanadium Redox-Flow Batteries-
dc.typeArticle-
dc.identifier.wosid000435524300091-
dc.identifier.scopusid2-s2.0-85046684822-
dc.type.rimsART-
dc.citation.volume18-
dc.citation.issue6-
dc.citation.beginningpage3962-
dc.citation.endingpage3968-
dc.citation.publicationnameNANO LETTERS-
dc.identifier.doi10.1021/acs.nanolett.8b01429-
dc.contributor.localauthorJung, Hee-Tae-
dc.contributor.localauthorKim, Hee-Tak-
dc.contributor.nonIdAuthorKim, Soohyun-
dc.contributor.nonIdAuthorHeo, Jiyun-
dc.contributor.nonIdAuthorLee, Jang Yong-
dc.contributor.nonIdAuthorHong, Young Taik-
dc.description.isOpenAccessN-
dc.type.journalArticleArticle-
dc.subject.keywordAuthorGraphene oxide framework membranes-
dc.subject.keywordAuthorvanadium redox-flow batteries-
dc.subject.keywordAuthorpore-size exclusions-
dc.subject.keywordAuthorhydrocarbon membranes-
dc.subject.keywordAuthorchemical stabilities-
dc.subject.keywordPlusLITHIUM-SULFUR BATTERIES-
dc.subject.keywordPlusRESEARCH-AND-DEVELOPMENT-
dc.subject.keywordPlusAB-INITIO-
dc.subject.keywordPlusSEPARATION-
dc.subject.keywordPlusPROTON-
dc.subject.keywordPlusWATER-
dc.subject.keywordPlusFUNCTIONALIZATION-
dc.subject.keywordPlusDEGRADATION-
dc.subject.keywordPlusPERFORMANCE-
dc.subject.keywordPlusTRANSPORT-
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