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dc.contributor.authorAziz, Md. Abdulko
dc.contributor.authorShanmugam, Sangarajuko
dc.date.accessioned2018-10-11T02:03:20Z-
dc.date.available2018-10-11T02:03:20Z-
dc.date.created2018-10-08-
dc.date.created2018-10-08-
dc.date.issued2018-09-
dc.identifier.citationJournal of Materials Chemistry A, v.6, no.36, pp.17740 - 17750-
dc.identifier.issn2050-7488-
dc.identifier.urihttp://hdl.handle.net/20.500.11750/9356-
dc.description.abstractWe describe the fabrication of a new block copolymer, sulfonated poly(ether ketone sulfone) (SPEKS) decorated with sulfonated graphene oxide (sGO) as a potential proton-exchange composite membrane for all-vanadium redox flow batteries (VRBs). The simple design of the SPEKS/sGO composite membrane offers key advantages in VRBs relative to commercial Nafion® membrane. The SPEKS/sGO composite membrane exhibited significantly lower vanadium ion permeability, which resulted in an excellent ion selectivity (10.2 × 105 S min cm-3) in comparison with the pristine SPEKS (7.9 × 105 S min cm-3) and Nafion-212 (1.8 × 105 S min cm-3) membranes. As a result, the SPEKS/sGO composite membrane exhibited exceptional electrochemical performance in a VRB under a mixed-acid system. Further, the impressive cyclability with negligible capacity decay demonstrated the high chemical stability of the designed composite membrane for long-term operation. In addition, excellent battery performance with a Coulombic efficiency of 99.4% and energy efficiency of 82.5% was obtained for the SPEKS/sGO membrane compared with the Nafion-212 (CE, 89.6% and EE, 75.5%) and the pristine SPEKS (CE, 97.2% and EE, 74.7%) membranes in the VRB at 40 mA cm-2 current density. The VRB assembled with a SPEKS/sGO composite membrane had a lower self-discharge rate, retaining an open circuit voltage of 1.30 V for 395 h in comparison with the Nafion-212 (29 h) and pristine SPEKS (240 h) membranes. Therefore, given its remarkable electrochemical performance and improved chemical stability, the SPEKS/sGO composite membrane has good potential to be explored as a promising alternative for the Nafion® membrane currently extensively used in VRB applications. © 2018 The Royal Society of Chemistry.-
dc.languageEnglish-
dc.publisherRoyal Society of Chemistry-
dc.subjectBlock copolymers-
dc.subjectChemical stability-
dc.subjectElectric discharges-
dc.subjectEnergy efficiency-
dc.subjectFlow batteries-
dc.subjectGraphene-
dc.subjectIon exchange-
dc.subjectIons-
dc.subjectKetones-
dc.subjectMembranes-
dc.subjectOpen circuit voltage-
dc.subjectVanadium-
dc.subjectAll vanadium redox flow battery-
dc.subjectBattery performance-
dc.subjectCoulombic efficiency-
dc.subjectElectrochemical performance-
dc.subjectIon selectivity-
dc.subjectProton exchange membranes-
dc.subjectProton-exchange composite membranes-
dc.subjectVanadium ion permeabilities-
dc.subjectComposite membranes-
dc.titleSulfonated graphene oxide-decorated block copolymer as a proton-exchange membrane: Improving the ion selectivity for all-vanadium redox flow batteries-
dc.typeArticle-
dc.identifier.doi10.1039/c8ta06717a-
dc.identifier.wosid000448147200052-
dc.identifier.scopusid2-s2.0-85053669254-
dc.type.localArticle(Overseas)-
dc.type.rimsART-
dc.description.journalClass1-
dc.contributor.localauthorShanmugam, Sangaraju-
dc.identifier.citationVolume6-
dc.identifier.citationNumber36-
dc.identifier.citationStartPage17740-
dc.identifier.citationEndPage17750-
dc.identifier.citationTitleJournal of Materials Chemistry A-
dc.type.journalArticleArticle-
dc.description.isOpenAccessN-


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