Highly transparent and flexible supercapacitors using graphene-graphene quantum dots chelate

Lee, Keunsik; Lee, Hanleem; Shin, Yonghun; Yoon, Yeoheung; Kim, Doyoung; Lee, Hyoyoung

doi:10.1016/j.nanoen.2016.06.030

Cited by 181 publications

(116 citation statements)

References 51 publications

(64 reference statements)

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“…This chemical and physical stabilities benefit from four reasons in this study: the Ag nanowires/PET TCEs provide a highly transparent, conductive and robust support as the current collector; after deposition of graphene, the laminated graphene layer isolates the active Ag nanowires from external condition including the electrolyte, playing a conclusive role of protection; meanwhile the seamless, uniform and flexible graphene layer also behaves as the active material that stores electrons by the electric‐double‐layer storage mechanism; the copercolating network of graphene layer and Ag nanowires could transport the electrons efficiently, cyclically accomplishing the operation of storage and transport. Considering the combination of areal capacitance and transparency of our TFSCs, the performance surpasses several previous reports as shown in Figure e . Furthermore, the Ragone plot exhibits the evaluation of energy/power densities (Figure f).…”

Section: Resultssupporting

confidence: 46%

Simultaneously Armored and Active Graphene for Transparent and Flexible Supercapacitors

Zhong

Zhang

et al. 2018

Adv Funct Materials

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Transparent and flexible supercapacitors (TFSCs) as indispensable components for future transparent and flexible electronics have attracted significant interests. The Ag nanowires/poly(ethylene terephthalate) (PET) transparent conductive electrodes (TCEs) exhibit strong competitiveness applied in the TFSCs due to the exceptional conductivity and transparency. However, the environmental tolerance of Ag nanowires such as oxidation and sulfurization limits the reliability. Herein, electric-double-layer TFSCs based on Ag nanowires/PET TCEs as current collectors are reported. More importantly, a seamless, uniform, and flexible graphene layer behaves as armored and active components simultaneously for the TFSCs, by a facile electrodeposition process. On the one hand, the flexible graphene layer can isolate the Ag nanowires away from the oxidation well, particularly in the condition of electrolyte. On the other hand, the laminated graphene layer with wrinkles can store electrons, and the copercolating network of graphene layer and Ag nanowires can transport the electrons efficiently, cyclically accomplishing the operation of storage and transport, by which the synergistic effect endows the TFSCs with decent optical and electrochemical performances. The interfacial capacitance is evaluated to discuss the relationship between the structure of graphene layer and the measured capacitance. This facile process provides a rational architecture and insights into TFSCs.

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Section: Resultssupporting

confidence: 46%

Simultaneously Armored and Active Graphene for Transparent and Flexible Supercapacitors

Zhong

Zhang

et al. 2018

Adv Funct Materials

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“…The scalpel technique has enabled a transformation from a single transparent electrode film into an array of coplanar devices without compromising intrinsic optoelectronic characteristics. This study is a starting point which can prompt other classes of transparent electrodes to be carved in the form of coplanar devices and correlated using the FoM c of transparent electrodes with that of transparent devices . Therefore, this FoM c should not be compared to other values obtained for single electrodes (not full devices) in other studies.…”

mentioning

confidence: 99%

Automated Scalpel Patterning of Solution Processed Thin Films for Fabrication of Transparent MXene Microsupercapacitors

Sallés

Quain

Kurra

et al. 2018

Small

101

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A simple and generic strategy is proposed to pattern thin films deposited by a solution processable route. A soft approach based on an automated scalpel technique is developed to engrave thin films in a single step for sculpting functional planar devices. MXenes—the emerging family of 2D transition metal carbides and nitrides—combine metallic conductivity and hydrophilicity, enabling solution processing of transparent conducting electrodes (TCEs) under ambient conditions. Scalable dip coating is employed to process titanium carbide, Ti3C2, MXene thin films with excellent optoelectronic properties, achieving electrical Figure of merit up to 14. Automated scalpel engraving is adopted to fabricate transparent and semi‐transparent MXene microsupercapacitors in a single step, hitherto not reported. Combining TCE and pseudocapacitive characteristics, MXene devices show excellent capacitive storage capabilities at high rates, without the aid of external metal current collectors. This technique allows for maskless patterning of solution processed thin films without losing intrinsic physicochemical properties and can be extended to fabricate heterostructured hybrid devices out of solution processable materials.

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“…Several groups reported that such CVD graphenes can be used as transparent electrodes for supercapacitors. [178][179][180][181] Adopting a prestrain approach to structural engineering, graphene papers with a crumpled structure can show high stretchability (300% strain) and be used for a stretchable supercapacitor. [182] In the same manner, the ultrathin CVD graphenes with the wave structural configuration have been developed on elastomeric substrates as STECs in stretchable transparent supercapacitors.…”

Section: Supercapacitorsmentioning

confidence: 99%

Deformable and Transparent Ionic and Electronic Conductors for Soft Energy Devices

Park

Parida

Lee

2017

Advanced Energy Materials

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The recent boom in deformable or stretchable electronics, flexible transparent displays/screens, and their integration into the human body has facilitated the development of multifunctional energy devices that are stretchable, transparent, wearable, and/or biocompatible while meeting the energy or power requirements. The development of soft energy systems begins with the preparation of relevant conductors and the design of innovative device configurations. In this study, recent advances and trends in stretchable and transparent electronic and ionic conductors are reviewed coupled with the growing efforts to use them for soft energy storage and conversion systems. Stretchable transparent ionic conductors present possibilities for use as current collectors and electrolytes in soft electronic/energy devices, providing novel insight into biofriendly systems for an effective human–machine interaction. Moreover, representative examples that demonstrate soft energy devices based on stretchable transparent ionic/electronic conductors are discussed in detail. Furthermore, the challenges and perspectives of developing novel stretchable transparent conductors and device configurations with tailored features are also considered.

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Highly transparent and flexible supercapacitors using graphene-graphene quantum dots chelate

Cited by 181 publications

References 51 publications

Simultaneously Armored and Active Graphene for Transparent and Flexible Supercapacitors

Simultaneously Armored and Active Graphene for Transparent and Flexible Supercapacitors

Automated Scalpel Patterning of Solution Processed Thin Films for Fabrication of Transparent MXene Microsupercapacitors

Deformable and Transparent Ionic and Electronic Conductors for Soft Energy Devices

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