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dc.creatorVujković, Milica
dc.creatorMatovic, Ljiljana
dc.creatorKrstić, Jugoslav
dc.creatorStojmenović, Marija
dc.creatorDukić, Andelka
dc.creatorBabić, Biljana M.
dc.creatorMentus, Slavko
dc.date.accessioned2019-01-30T17:54:12Z
dc.date.available2019-01-30T17:54:12Z
dc.date.issued2017
dc.identifier.issn0013-4686
dc.identifier.urihttps://cer.ihtm.bg.ac.rs/handle/123456789/2135
dc.description.abstractThe activated carbon cloth (ACC), obtained by chemical/physical activation of carbonized rayon fibers, was grinded in a ball mill and studied from the aspect of double layer capacitance. The changes in pore structure, morphology and acid/basic properties caused by ball milling were studied by means of N-2 adsorption/desorption, Fourier-transformed infrared spectrometry, Boehm's titration and Scanning Electron Microscopy. Both potentiodynamic and galvanostatic cycling were used to evaluate the double layer capacitance in three alkaline, acidic and neutral aqueous solutions (KOH, H2SO4 and Na2SO4). While double layer capacitance of original ACC was found to be negligible, ball milled material (ACCm) displayed capacitance in the range of supercapacitors. In order to explain this huge capacitance improvement, we found that ball milling substantially increased the concentration of lactone, phenolic and quinone groups on the surface. We suggest that these groups, through improved hydrophilicity, enable faster ion diffusion into carbon micropores. The energy density stored by double layer was highest in neutral sodium sulphate solution. Namely, operational voltage of similar to 2 V and double layer capacitance of 220 F g(-1) at 1A g(-1), enable the energy density of ACCm/Na2SO4/ACCm capacitor of 31.7 Wh kg(-1) at 2000 W kg(-1), much higher than that of commercial EDLC carbon capacitors. According to the here presented literature survey in a tabular form, the energy density of the studied sample is also higher from that of numerous thus far published aqueous carbon capacitors.en
dc.publisherOxford : Pergamon-Elsevier Science Ltd
dc.relationinfo:eu-repo/grantAgreement/MESTD/Integrated and Interdisciplinary Research (IIR or III)/45014/RS//
dc.relationinfo:eu-repo/grantAgreement/MESTD/Integrated and Interdisciplinary Research (IIR or III)/45012/RS//
dc.relationSerbian Academy of Sciences and Arts "Electrocatalysis in the contemporary processes of energy conve
dc.relationNATO through the Science for Peace Project - EAP. SFPP 984925-DURAPEM
dc.rightsrestrictedAccess
dc.sourceElectrochimica Acta
dc.subjectcarbon supercapacitoren
dc.subjectmechanochemical activationen
dc.subjectNa2SO4 aqueous electrolyteen
dc.subjecthigh energyen
dc.titleMechanically activated carbonized rayon fibers as an electrochemical supercapacitor in aqueous solutionsen
dc.typearticle
dc.rights.licenseARR
dcterms.abstractДукиц, Aнделка; Крстић, Југослав; Матовиц, Љиљана; Вујковиц, Милица; Ментус, Славко; Бабиц, Биљана; Стојменовиц, Марија;
dc.citation.volume245
dc.citation.spage796
dc.citation.epage806
dc.citation.other245: 796-806
dc.citation.rankM21
dc.description.otherPeer-reviewed version: [http://cer.ihtm.bg.ac.rs/handle/123456789/3011]
dc.identifier.doi10.1016/j.electacta.2017.06.018
dc.identifier.scopus2-s2.0-85020292566
dc.identifier.wos000406762700088
dc.type.versionpublishedVersion


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