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Please use this identifier to cite or link to this item: http://doi.org/10.25358/openscience-875
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dc.contributor.authorLiu, Zhaoyang
dc.date.accessioned2017-07-03T12:24:16Z
dc.date.available2017-07-03T14:24:16Z
dc.date.issued2017
dc.identifier.urihttps://openscience.ub.uni-mainz.de/handle/20.500.12030/877-
dc.description.abstractIn this thesis, micro-supercapacitors (MSCs) based on graphene or graphene composite materials were fabricated to address their unique properties such as facile printable device, high power density, and multi-functional application. In the 2nd chapter, solution fabrication of large area and highly conductive graphene films was developed, by facile spray coating of graphene-conductive polymer hybrid ink. The obtained graphene films exhibited excellent mechanical properties, which enabled their application as bottom electrodes for ultrathin organic photodetector devices. In the 3rd chapter, direct printing of in-plane MSCs on flexible substrates was demonstrated, employing both an electrochemically exfoliated graphene ink and a hybrid ink with an electrochemically active conducting polymer. The as fabricated MSCs on paper substrates delivered a significant areal capacitance. By employing ultra-thin PET substrates, “ultra-flexible” MSC devices were also achieved with excellent flexibility. In the 4th chapter, in-plane structured planar MSCs based on mesoporous polyaniline patterned graphene were introduced. The strong synergistic effect from electron-double-layer-capacitive graphene and pseudocapacitive mesoporous-PANi leads to excellent MSC device performances. The fabricated micro devices delivered both significant volumetric capacitance and rate capabilities, which further lead to a high power density. This performance outperformed most of those reported graphene-based high power supercapacitors/MSCs results. In the 5th chapter, in-plane structured planar MSCs with photo-switchable behavior were demonstrated, the fabricated devices can be operated at ultrahigh rates. The areal capacitance of these MSC devices showed a reversible modulation up to 20%. THz spectroscopy suggests that the optically switchable capacitance during UV/Vis light treatments was enabled by the optically shifted charge equilibrium at the diarylethene/graphene interface. The achievement of such smart MSC device opens up exciting opportunities for future portable and wearable power supplies in diverse applications with non-contact modulation of the properties.en_GB
dc.language.isoeng
dc.rightsInCopyrightde_DE
dc.rights.urihttps://rightsstatements.org/vocab/InC/1.0/
dc.subject.ddc540 Chemiede_DE
dc.subject.ddc540 Chemistry and allied sciencesen_GB
dc.titleGraphene based electrode materials for printable, high power and photo-switchable micro-supercapacitorsen_GB
dc.typeDissertationde_DE
dc.identifier.urnurn:nbn:de:hebis:77-diss-1000013958
dc.identifier.doihttp://doi.org/10.25358/openscience-875-
jgu.type.dinitypedoctoralThesis
jgu.type.versionOriginal worken_GB
jgu.type.resourceText
jgu.description.extentIV, 147 Seiten
jgu.organisation.departmentFB 09 Chemie, Pharmazie u. Geowissensch.-
jgu.organisation.year2017
jgu.organisation.number7950-
jgu.organisation.nameJohannes Gutenberg-Universität Mainz-
jgu.rights.accessrightsopenAccess-
jgu.organisation.placeMainz-
jgu.subject.ddccode540
opus.date.accessioned2017-07-03T12:24:16Z
opus.date.modified2017-07-04T13:46:53Z
opus.date.available2017-07-03T14:24:16
opus.subject.dfgcode00-000
opus.organisation.stringFB 09: Chemie, Pharmazie und Geowissenschaften: Institut für Physikalische Chemiede_DE
opus.identifier.opusid100001395
opus.institute.number0906
opus.metadataonlyfalse
opus.type.contenttypeDissertationde_DE
opus.type.contenttypeDissertationen_GB
jgu.organisation.rorhttps://ror.org/023b0x485
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