Fabrication Of Interdigitated Micro-supercapacitor Devices By Direct Laser Writing Onto Ultra-thin, Flexible And Free-standing Graphite Oxide Films

dc.creatorKumar
dc.creatorRajesh; Savu
dc.creatorRaluca; Joanni
dc.creatorEdnan; Vaz
dc.creatorAlfredo R.; Canesqui
dc.creatorMara A.; Singh
dc.creatorRajesh K.; Timm
dc.creatorRonaldo A.; Kubota
dc.creatorLauro T.; Moshkalev
dc.creatorStanislav A.
dc.date2016
dc.date2017-11-13T13:44:18Z
dc.date2017-11-13T13:44:18Z
dc.date.accessioned2018-03-29T05:58:56Z
dc.date.available2018-03-29T05:58:56Z
dc.identifierRsc Advances. Royal Soc Chemistry, v. 6, p. 84769 - 84776, 2016.
dc.identifier2046-2069
dc.identifierWOS:000384139000026
dc.identifier10.1039/c6ra17516c
dc.identifierhttp://pubs.rsc.org/en/content/articlelanding/2016/ra/c6ra17516c#!divAbstract
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/328733
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1365758
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionIn this work we present graphene-based in-plane flexible interdigitated micro-supercapacitor devices fabricated through direct laser writing onto ultra-thin graphite oxide (GO) films. The fabrication route is simple, fast, additive-free, mask-free and cost effective. This involves direct micro-writing of reduced graphene oxide (rGO) by a pulsed UV laser on a very small area (1.14 cm(2)). The fabricated micro-supercapacitor contains nineteen pairs of rGO electrodes separated by the unreduced portion of the GO film. The single laser patterned rGO electrode presents low resistivity, while the unpatterned portion is non-conducting. Under the optimized laser parameters the 2.2 mu m ultra-thin GO films were completely and uniformly reduced. The electrochemical measurements showed that the micro-supercapacitor, packed in a glass cavity, and in the presence of a liquid electrolyte have a capacitance nearly 288% higher (288.7 mF cm(-3)) compared to the as-fabricated device (0.36 mF cm(-3)). The as-fabricated micro-supercapacitor without electrolyte also shows some capacitance due to the presence of free ions in the unreduced portion of GO which plays a crucial role. Furthermore, the cycling stability of the as-fabricated micro-supercapacitor is robust, with not much performance degradation for more that 5000 cycles.
dc.description6
dc.description88
dc.description84769
dc.description84776
dc.descriptionCNPq (Brazil)
dc.descriptionFAPESP (Brazil)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.languageEnglish
dc.publisherRoyal Soc Chemistry
dc.publisherCambridge
dc.relationRSC Advances
dc.rightsaberto
dc.sourceWOS
dc.subjectRaman-spectroscopy
dc.subjectHigh-performance
dc.subjectEnergy-storage
dc.subjectInduced Graphene
dc.subjectElectrochemical Capacitors
dc.subjectAssisted Synthesis
dc.subjectHigh-power
dc.subjectCarbon
dc.subjectDeposition
dc.subjectSystems
dc.titleFabrication Of Interdigitated Micro-supercapacitor Devices By Direct Laser Writing Onto Ultra-thin, Flexible And Free-standing Graphite Oxide Films
dc.typeArtículos de revistas


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