Towards high performance flexible planar supercapacitors: In-situ laser scribing doping and reduction of graphene oxide films

Hamed, Aya; Hessein, Amr; El‐Moneim, Ahmed Abd

doi:10.1016/j.apsusc.2021.149457

Cited by 35 publications

(10 citation statements)

References 76 publications

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“…8,13 Abd El-Moneim et al reported that S, N dual-doped reduced graphene oxide (rGO) shows 2.5 times higher capacitance behavior than that of only N-doped rGO. 21 Tarimo and co-workers reported sulphur-reduced graphene oxide composites with improved electrochemical performance for supercapacitor applications having a specific capacity of 113.8 mA h g −1 at 0.5 A g −1 current. 20…”

Section: Introductionmentioning

confidence: 99%

A bottom-up fabrication for sulphur (S), nitrogen (N) co-doped two-dimensional microporous carbon nanosheets for high-performance supercapacitors and H₂, CO₂ storage

Panda

Barman

2023

Sustainable Energy Fuels

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Section: Introductionmentioning

confidence: 99%

A bottom-up fabrication for sulphur (S), nitrogen (N) co-doped two-dimensional microporous carbon nanosheets for high-performance supercapacitors and H₂, CO₂ storage

Panda

Barman

2023

Sustainable Energy Fuels

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“…They have shown that, with elevation of the annealing temperature (650–950 °C), the atom percentage of N decreased and that of S increased, leading to a better capacitive behavior . Very recently, Hamed et al demonstrated a comparative study between N-doped and N,S-dual-doped reduced graphene oxide (rGO), where the capacitive behavior of the latter was 2.5 times that of the former . Parveen et al showed that S doping took place in graphene during electrochemical exfoliation of a graphite rod in the presence of Na 2 S 2 O 3 and H 2 SO 4 and due to S incorporation supercapacitor performance was enhanced largely .…”

Section: Introductionmentioning

confidence: 99%

Hydrothermally Synthesized Sulfur-Doped Graphite as Supercapacitor Electrode Materials

Maity

Banerjee

Bhattacharya

et al. 2022

ACS Appl. Nano Mater.

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Sulfur-doped graphite (S-DG) was synthesized using a sustainable method. Low-cost cellulose fiber and carbon disulfide (CS 2 ) were used as precursors for carbon and sulfur (S) sources, respectively, and a multistep chemical and thermochemical synthesis process was employed to obtain S-DG. Advanced microscopic and spectroscopic techniques and porosimetry analyses were performed to probe the surface morphology, surface area, microstructures, and chemical bonding states of S-DG. Interestingly, X-ray photoelectron spectroscopy revealed that the S loads were 3.81 and 7.02 atom % when reactions were carried out in aqueous and dimethyl sulfoxide (DMSO) media, respectively. The specific surface areas were calculated as 522.77 and 693.27 m 2 g −1 for the two materials, respectively. To our best knowledge, the 7.02 atom % S load is the highest S doping reported so far in a graphite material where laboratory chemicals have been used as precursors. Both materials, i.e., S-DG Water and S-DG DMSO , were tested as supercapacitor electrodes in a portable electrochemical cell with a three-electrode system to check their potential and stability for the fabrication of renewable energy storage devices. Cyclic voltammetry and galvanostatic charging−discharging techniques were performed within a potential window of 1 V in the presence of 1 M Na 2 SO 4 as an electrolyte. The maximum specific capacitances (C Sp ) of S-DG Water and S-DG DMSO were obtained as 155.61 and 261.43 F g −1 (at a scan rate of 10 mV s −1 ), respectively. The result concluded that the extent of S doping appeared to be the key factor for control of the peak current. Importantly, our investigation suggests that the S load in graphite facilitates a diffusion-driven storage mechanism and a higher amount of S may enhance surface-controlled storage as well. Both materials show excellent cyclic stability with >98% retention of the initial specific capacitance over 10000 cycles of charging−discharging.

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“…In terms of the areal discharge capacity, the above values correspond to ∼4.5 and ∼2.9 μΑh cm –2 , whereas the areal energy (power) density is ∼1.9 μWh cm –2 (20.55 μW cm –2 ) and ∼1.1 μWh cm –2 (37.23 μW cm –2 ). These capacitance values are among the highest reported ones for interdigitated graphene supercapacitors, which are fabricated by laser-assisted methods. ,− A comparison is presented in Table . The equivalent series resistance (ESR) was estimated to be ∼267 Οhm from the intersection of the impedance curve with the horizontal axis in the Nyquist plot, shown in Figure d.…”

Section: Results and Discussionmentioning

confidence: 87%

Direct Graphene Deposition via a Modified Laser-Assisted Method for Interdigitated Microflexible Supercapacitors

Samartzis,

Athanasiou,

Sygellou

et al. 2024

ACS Appl. Nano Mater.

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The transcendence toward smarter technologies and the rapid expansion of the Internet of Things requires miniaturized energy storage systems, which may also be shape-conformable, such as microflexible supercapacitors. Their fabrication must be compatible with emerging manufacturing platforms with regard to scalability and sustainability. Here, we modify a laser-based method we recently developed for simultaneously synthesizing and transferring graphene onto a selected substrate. The modification of the method lies in the tuning of two key parameters, namely, the inclination of the laser beam and the distance between the precursor material and the acceptor substrate. A proper combination of these parameters enables the displacement of the trace of the transmitted laser beam from the deposited graphene film area. This mitigates the negative effects that arise from the laser-induced ablation of graphene on heat-sensitive substrates and significantly improves the electrical conductivity of the graphene films. The optimized graphene exhibits very high C/O (36) and sp2/sp3 (13) ratios. Post-transport irradiation was used to transform the continuous graphene films to interdigitated electrodes. The capacitance of the microflexible supercapacitor was measured to be among the highest reported ones in relation to interdigitated supercapacitors with electrodes based on laser-grown graphene. The device shows good cycling stability, retaining 91% of its capacitance after 10,000 cycles, showing no substantial degradation after applying bending conditions. This promising laser-based approach emerges as a viable alternative for the fabrication of microflexible interdigitated supercapacitors for paper electronics and smart textiles.

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Towards high performance flexible planar supercapacitors: In-situ laser scribing doping and reduction of graphene oxide films

Cited by 35 publications

References 76 publications

A bottom-up fabrication for sulphur (S), nitrogen (N) co-doped two-dimensional microporous carbon nanosheets for high-performance supercapacitors and H₂, CO₂ storage

A bottom-up fabrication for sulphur (S), nitrogen (N) co-doped two-dimensional microporous carbon nanosheets for high-performance supercapacitors and H₂, CO₂ storage

Hydrothermally Synthesized Sulfur-Doped Graphite as Supercapacitor Electrode Materials

Direct Graphene Deposition via a Modified Laser-Assisted Method for Interdigitated Microflexible Supercapacitors

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Towards high performance flexible planar supercapacitors: In-situ laser scribing doping and reduction of graphene oxide films

Cited by 35 publications

References 76 publications

A bottom-up fabrication for sulphur (S), nitrogen (N) co-doped two-dimensional microporous carbon nanosheets for high-performance supercapacitors and H2, CO2 storage

A bottom-up fabrication for sulphur (S), nitrogen (N) co-doped two-dimensional microporous carbon nanosheets for high-performance supercapacitors and H2, CO2 storage

Hydrothermally Synthesized Sulfur-Doped Graphite as Supercapacitor Electrode Materials

Direct Graphene Deposition via a Modified Laser-Assisted Method for Interdigitated Microflexible Supercapacitors

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Product

Resources

About

A bottom-up fabrication for sulphur (S), nitrogen (N) co-doped two-dimensional microporous carbon nanosheets for high-performance supercapacitors and H₂, CO₂ storage

A bottom-up fabrication for sulphur (S), nitrogen (N) co-doped two-dimensional microporous carbon nanosheets for high-performance supercapacitors and H₂, CO₂ storage