Direct printing and reduction of graphite oxide for flexible supercapacitors

Jung, Hanyung; Cheah, Chang Ve; Jeong, Namjo; Lee, Junghoon

doi:10.1063/1.4890840

Cited by 47 publications

(32 citation statements)

References 17 publications

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“…rGO can be produced by variousp rocesses, but they currently require high-temperatures or are prohibitively timeconsuming. [27] Jung et al employed ax enon camera flash, [28] but this method provede xtremelys ensitive to GO/substrate wetting, since a number of substrates produced GO droplets of various contact angles, at endency critical to rGO development as GO undergoes volume expansion during reduction.G uan et al used a picosecond laser in al iquid nitrogen environmentt of abricate porousrGO from GO sheets. [24,25] Jiang et al used annealing in H 2 /Ar at 300 8Cf or 2h [26] and Tian et al used H 2 plasma at 425 8C.…”

Section: Introductionmentioning

confidence: 99%

Atmospheric Dry Hydrogen Plasma Reduction of Inkjet‐Printed Flexible Graphene Oxide Electrodes

et al. 2018

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This study concerns a low-temperature method for dry hydrogen plasma reduction of inkjet-printed flexible graphene oxide (GO) electrodes, an approach compatible with processes envisaged for the manufacture of flexible electronics. The processing of GO to reduced graphene oxide (rGO) was performed in 1-64 s, and sp /sp +sp carbon concentration increased from approximately 20 % to 90 %. Since the plasma reduction was associated with an etching effect, the optimal reduction time occurred between 8 and 16 s. The surface showed good mechanical stability when deposited on polyethylene terephthalate flexible foils and significantly lower sheet resistance after plasma reduction. This method for dry plasma reduction could be important for large-area hydrogenation and reduction of GO flexible surfaces, with present and potential applications in a wide variety of emerging technologies.

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Section: Introductionmentioning

confidence: 99%

Atmospheric Dry Hydrogen Plasma Reduction of Inkjet‐Printed Flexible Graphene Oxide Electrodes

et al. 2018

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“…5e along with recently reported state-of-the-art printed MSC devices. 10,11,21,29,43,[51][52][53][54][55][56][57][58][59][60] The energy density values of RArG-4-200 MSC range from 4.5 to 18.8 mW h cm À3 , with corresponding power densities in the range of 0.5 to 40.9 W cm À3 . This energy storage capability is notably higher than that of commercial lithium thin-film batteries, 2 and is superior to those of recently reported MSC devices based on alternative electrochemical active materials including carbon (0.2-9.1 mW h cm À3 ), metal oxides (0.7-1.4 mW h cm À3 ) and conducting polymers (3 mW h cm À3 ) fabricated by various printing techniques.…”

Section: Resultsmentioning

confidence: 99%

Screen-printing fabrication of high volumetric energy density micro-supercapacitors based on high-resolution thixotropic-ternary hybrid interdigital micro-electrodes

Liu

et al. 2019

Mater. Chem. Front.

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Printed micro-supercapacitors (MSCs) have been acknowledged as promising on-chip energy storage systems for miniaturized printed electronics. However, scalable fabrication of the printed MSCs with both high energy density and power density as well as micrometer-level electrode resolution remains unsolved. Herein, we demonstrate a general and scalable screen-printing technique for the one-step construction of highperformance MSCs, utilizing thixotropic hybrid ink of hydrous ruthenium oxide (RuO 2 ÁxH 2 O) nanoparticles-silver nanowire (AgNW)-graphene oxide (GO) as interdigital in-plane microelectrodes. Benefited from the synergistic effects from the ternary nanocomponents, high-resolution microelectrode fingers of up to 50 mm, and outstanding electrical conductivity 45000 S cm À1 of microelectrode, the resulting fully-printed MSCs deliver record volumetric capacitance of 338 F cm À3 , landmark volumetric energy density of 18.8 mW h cm À3 and power density of 40.9 W cm À3 , all of which are higher than those of previously reported printed MSCs.Furthermore, our printed MSCs exhibit long-term cycling stability with a high capacitance retention of 91.6% after 8000 cycles, and remarkably mechanical flexibility, showing 88.6% of initial capacitance after 2000 bending cycles. Finally, this simple printing approach in junction with high functionality of the electrode ink enables the fast and scalable fabrication of flexible MSCs with various geometries and efficient production of MSC arrays connected in series and/or in parallel connection without requirement of additional metal-based contacts and interconnectors, showing great potential for applications in wearable system-on-a-chip.

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“…These performance metrics are comparable with commercial supercapacitors. [138] Chi et al developed an all-solid-state symmetric supercapacitor based on inkjet printing a graphene hydrogelloaded polyanilic (GH-PANI) electrode, to give a power density of 0.4 kW kg −1 and energy density of 24.02 Wh kg −1 . [139] Li et al demonstrated that that printing graphene/DMF dispersions as inks on the fingers of an interdigitated structure in a symmetric supercapacitor delivers a reasonably high areal power density of 8.8 mW cm −2 .…”

Section: D Printed Supercapacitorsmentioning

confidence: 99%

Evolution of 3D Printing Methods and Materials for Electrochemical Energy Storage

et al. 2020

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Additive manufacturing has revolutionized the building of materials, and 3D‐printing has become a useful tool for complex electrode assembly for batteries and supercapacitors. The field initially grew from extrusion‐based methods and quickly evolved to photopolymerization printing, while supercapacitor technologies less sensitive to solvents more often involved material jetting processes. The need to develop higher‐resolution multimaterial printers is borne out in the performance data of recent 3D printed electrochemical energy storage devices. Underpinning every part of a 3D‐printable battery are the printing method and the feed material. These influence material purity, printing fidelity, accuracy, complexity, and the ability to form conductive, ceramic, or solvent‐stable materials. The future of 3D‐printable batteries and electrochemical energy storage devices is reliant on materials and printing methods that are co‐operatively informed by device design. Herein, the material and method requirements in 3D‐printable batteries and supercapacitors are addressed and requirements for the future of the field are outlined by linking existing performance limitations to requirements for printable energy‐storage materials, casings, and direct printing of electrodes and electrolytes. A guide to materials and printing method choice best suited for alternative‐form‐factor energy‐storage devices to be designed and integrated into the devices they power is thus provided.

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Direct printing and reduction of graphite oxide for flexible supercapacitors

Cited by 47 publications

References 17 publications

Atmospheric Dry Hydrogen Plasma Reduction of Inkjet‐Printed Flexible Graphene Oxide Electrodes

Atmospheric Dry Hydrogen Plasma Reduction of Inkjet‐Printed Flexible Graphene Oxide Electrodes

Screen-printing fabrication of high volumetric energy density micro-supercapacitors based on high-resolution thixotropic-ternary hybrid interdigital micro-electrodes

Evolution of 3D Printing Methods and Materials for Electrochemical Energy Storage

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