Laser-Induced Reduction of Graphene Oxide by Intensity-Modulated Line Beam for Supercapacitor Applications

Tran, Tung Xuan; Choi, Hayelin; Huu, Cuong; Sul, Ji Hwan; Kim, In Gyoo; Lee, Seung‐Mo; Kim, Jae Hyun; In, Junyong

doi:10.1021/acsami.8b14678

Cited by 61 publications

(41 citation statements)

References 45 publications

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“…At discharge current of 0.5 mAcm -2 , the specific capacitance was 5 56.6 mFcm -2 and 9 mFcm -2 at 10 mAcm -2 . The LIG device 6 performance exhibited a high specific capacitance in 7 comparison to previously reported graphene-based SCs (Table 8 1) [19,48,49,50,51].…”

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confidence: 75%

High Performance Supercapacitor Based on Laser Induced Graphene for Wearable Devices

et al. 2020

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To ensure maximum comfort for the wearer, electronic components that include energy harvesters need to be mechanically conformable. In this context, we demonstrate a versatile, cost-effective and efficient method for fabricating graphene supercapacitor electrodes using Laser Induced Graphene (LIG). A CO2 laser beam instantly transforms the irradiated polyethersulfone polymer (PES) into a highly porous carbon structure. The LIG method was used to deposit graphene layers on graphite sheets to produce the supercapacitor electrodes. Graphene formation and morphology were examined and confirmed using several techniques including Scanning Electron Microscopy (SEM), Energy Dispersive X-ray (EDX) spectroscopy, Raman Spectroscopy and Fourier transform infrared spectroscopy (FTIR). Moreover, the electrochemical characterization was performed in different electrolytes (NaOH and KOH). At 5 mV s -1 , the LIG electrode achieved 165 mF cm -2 and 250 mF cm -2 in NaOH and KOH electrolytes, respectively. Consequently, we show that a wearable symmetric supercapacitor device with LIG electrodes achieved 98.5 mF cm -2 at 5 mV s -1 in KOH electrolyte. The device demonstrated an energy density of 11.3 µWh.cm -2 with power density of 0.33 mWcm -2 at 0.5 mA cm -2 . The retention of capacitance was 75% after 2000 cycles, with outstanding performance for the comparable graphene-based electrodes. These results further validate the use of LIG for developing flexible energy harvesters for wearable applications.

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confidence: 75%

High Performance Supercapacitor Based on Laser Induced Graphene for Wearable Devices

et al. 2020

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“…This clearly means that under the same incident power, a slower scan speed and a smaller step size mean a higher irradiation time of GO and consequently, a higher removal efficiency of the oxygen-containing radicals from the graphene surface. Currently, a CO 2 commercial laser (l ¼ 10.6 mm) is the most widely used to produce both LrGO 121,122 and LIG. 123,124 Then, a pulsed laser with the wavelength in the UV region has been used in several studies in order to produce LrGO.…”

Section: Electrode Fabricated By Laser Direct Writingmentioning

confidence: 99%

Recent trends in graphene supercapacitors: from large area to microsupercapacitors

Velasco

Ryu

Boscá

et al. 2021

Sustainable Energy Fuels

148

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“…Different morphologies, namely "sheet ", "needle " and "porous ", can be achieved with the optimized laser-writing recipes 60 . With repeated laser irradiations, the structure of PI-derived LSG can be transformed from its original macroporous foam to an intermediate concave corrugated tile structure, and finally a carbon nanotube structure 61 . Instead of a focused round beam, a wide line beam was employed to transform GO into LSG, improving the efficiency of large area laser reduction 62 .…”

Section: Modification Of Laser Scribed Graphenementioning

confidence: 99%

Laser scribed graphene for supercapacitors

Zhang¹,

Chen²,

Gu³

2021

OEA

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Supercapacitors, with the merits of both capacitors for safe and fast charge and batteries for high energy storage have drawn tremendous attention. Recently, laser scribed graphene has been increasingly studied for supercapacitor applications due to its unique properties, such as flexible fabrication, large surface area and high electrical conductivity. With the laser direct writing process, graphene can be directly fabricated and patterned as the supercapacitor electrodes. In this review, facile laser direct writing methods for graphene were firstly summarized. Various precursors, mainly graphene oxide and polyimide were employed for laser scribed graphene and the modifications of graphene properties were also discussed. This laser scribed graphene was applied for electrochemical double-layer capacitors, pseudo-capacitors and hybrid supercapacitors. Diverse strategies including doping, composite materials and pattern design were utilized to enhance the electrochemical performances of supercapacitors. Featured supercapacitors with excellent flexible, ultrafinestructured and integrated functions were also reviewed.

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Laser-Induced Reduction of Graphene Oxide by Intensity-Modulated Line Beam for Supercapacitor Applications

Cited by 61 publications

References 45 publications

High Performance Supercapacitor Based on Laser Induced Graphene for Wearable Devices

High Performance Supercapacitor Based on Laser Induced Graphene for Wearable Devices

Recent trends in graphene supercapacitors: from large area to microsupercapacitors

Laser scribed graphene for supercapacitors

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