NaCl multistage-recrystallization-induced formation of 3D micro-structured ribbon-like graphene based films for high performance flexible/transparent supercapacitors

Li, Na; Huang, Xuankai; Zhang, Haiyan; Shi, Zhicong; Li, Yunyong; Wang, Chengxin

doi:10.1039/c7ta03353b

Cited by 21 publications

(38 citation statements)

References 41 publications

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“…The areal capacity of the WO 3 coated ST electrodes reached 4.84 μAh cm −2 (32.3 mAh g −1 at 2 A g −1 based on the weight of dried WO 3 ink, 44.8 mAh cm −3 at 2.78 A cm −3 calculated based on the total volume of WO 3 /AgNWs-PEDOT) and 3.88 μAh cm −2 (25.8 mAh g −1 at 4 A g −1 , 35.9 mAh cm −3 at 5.56 A cm −3 ) at current density of 0.3 and 0.6 mA cm −2 , respectively. Such areal capacities are much higher than those previously reported pure WO 3 materials [68][69][70] and our recently reported WO 3 /PEDOT:PSS composites [50], and is also comparable to the WO 3 /PANI composites [68] and other transparent capacitor films such as graphene wrapped Ni (OH) 2 nanosheet film [71] or graphene-hollow-cubes film [72].…”

Section: Energy Storage Performancesupporting

confidence: 60%

Inkjet-printed metal oxide nanoparticles on elastomer for strain-adaptive transmissive electrochromic energy storage systems

Cai

Park

Cheng

et al. 2018

Science and Technology of Advanced Materials

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The emergence of soft energy devices provides new possibilities for various applications, it also creates significant challenges in the selection of structural design and material compatibility. Herein, we demonstrate a stretchable transmissive electrochromic energy storage device by inkjet-printing single layer of WO 3 nanoparticles on an elastomeric transparent conductor. Such hybrid electrode is highly conductive and deformable, making it an excellent candidate for the application: large optical modulation of 40%, fast switching speed (<4.5 s), high coloration efficiency (75.5 cm 2 C −1), good stability and high specific capacity (32.3 mAh g −1 and 44.8 mAh cm −3). The device consists of WO 3-based hybrid electrode and polyaniline/ carbon nanotubes composite electrode. It maintains excellent electrochromic and energy storage performance even when stretched up to 50%, and achieves a maximum areal energy density of 0.61 μWh cm −2 and power density of 0.83 mW cm −2 , which is one of the highest values in stretchable transparent energy storage devices. A device featuring stretchable transparent nanowires based electrode is illustrated as an energy indicator in which the stored energy can be monitored via reversible color variation. This high performance and multifunctional electrochromic energy storage device is a promising candidate for deformable and wearable electronics.

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Section: Energy Storage Performancesupporting

confidence: 60%

Inkjet-printed metal oxide nanoparticles on elastomer for strain-adaptive transmissive electrochromic energy storage systems

Cai

Park

Cheng

et al. 2018

Science and Technology of Advanced Materials

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“…Figure b shows two sharp peaks at about 1350 and 1580 cm −1 , corresponding to the disorder induced D band and graphitic G band . The sharp and high G band demonstrates the high crystallinity nature of graphene layers in all G@NiO samples . Further, the intensity ratio of D band to G band ( I D / I G ) in all G@NiO samples is about 0.8, suggesting that low structural defects are introduced in graphene layers .…”

Section: Resultsmentioning

confidence: 90%

In Situ Synthesis of Vertical Standing Nanosized NiO Encapsulated in Graphene as Electrodes for High‐Performance Supercapacitors

et al. 2017

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NiO is a promising electrode material for supercapacitors. Herein, the novel vertically standing nanosized NiO encapsulated in graphene layers (G@NiO) are rationally designed and synthesized as nanosheet arrays. This unique vertical standing structure of G@NiO nanosheet arrays can enlarge the accessible surface area with electrolytes, and has the benefits of short ion diffusion path and good charge transport. Further, an interconnected graphene conductive network acts as binder to encapsulate the nanosized NiO particles as core–shell structure, which can promote the charge transport and maintain the structural stability. Consequently, the optimized G@NiO hybrid electrodes exhibit a remarkably enhanced specific capacity up to 1073 C g−1 and excellent cycling stability. This study provides a facial strategy to design and construct high‐performance metal oxides for energy storage.

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“…27 One approach that has been previously used to assemble graphene into a practical architecture is the production of long thin fibres or ribbons with controlled structures. 15,16,[28][29][30][31][32] This method allows the translation of the beneficial properties of graphene, such as the high electrical conductivity and mechanical properties, into a macroscopic structure that better facilitates realworld applications. The methods previously exploited to achieve this goal include wet spinning of graphene oxide (GO) fibres, 15,28,33,34 encapsulation of GO suspensions into a pipe-like template structure to direct assembly, 29,35,36 and production of long flat ribbon-like structures from GO by modifying the wet spinning conditions.…”

Section: Introductionmentioning

confidence: 99%

A single step strategy to fabricate graphene fibres via electrochemical exfoliation for micro-supercapacitor applications

Marsden

et al. 2019

Electrochimica Acta

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A green and low-cost method is presented to fabricate graphene fibre electrodes by electrochemical exfoliation of thin strips of graphite foil. When assembled into microsupercapacitors, the graphene fibres achieved an excellent electrochemical capacitance (~ 247.6 mF•cm-2 at ~2 mA•cm-2) and low equivalent series resistance (~ 2.4 Ω), a significant improvement over the typically used graphene oxide based fibres. This excellent capacitive performance indicates these graphene-based energy storage devices could be ideal for microelectronics applications. Additionally, an all-solid-state flexible micro-supercapacitor was fabricated using a gel electrolyte (H3PO4/PVA) and exhibited a high areal capacitance of 70.6 mF•cm-2 and a superior cycling stability of ~ 96% capacitance retention after 2400 cycles, suggesting possible applications for flexible energy storage. The easily scalable and facile single step strategy presented here outperforms the conventionally used graphene oxide based methods, which typically require harmful chemicals and involve a more complex synthesis procedure.

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NaCl multistage-recrystallization-induced formation of 3D micro-structured ribbon-like graphene based films for high performance flexible/transparent supercapacitors

Abstract: Micro-structured interconnected ribbon-like graphene sheet hanging in polygonal graphene walls was developed; the ribbons were formed along grain boundaries during the NaCl multistage-recrystallization process.

Cited by 21 publications

References 41 publications

Inkjet-printed metal oxide nanoparticles on elastomer for strain-adaptive transmissive electrochromic energy storage systems

Inkjet-printed metal oxide nanoparticles on elastomer for strain-adaptive transmissive electrochromic energy storage systems

In Situ Synthesis of Vertical Standing Nanosized NiO Encapsulated in Graphene as Electrodes for High‐Performance Supercapacitors

A single step strategy to fabricate graphene fibres via electrochemical exfoliation for micro-supercapacitor applications

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