Enhanced surface and electrochemical properties of nitrogen-doped reduced graphene oxide by violet laser treatment for high charge storage and lower self-discharge supercapacitors

Nathabumroong, Sarawudh; Poochai, Chatwarin; Chanlek, Narong; Eknapakul, Tanachat; Sonsupap, Somchai; Tuichai, Wattana; Sriprachuabwong, Chakrit; Rujirawat, Saroj; Songsiriritthigul, Prayoon; Tuantranont, Adisorn; Yimnirun, Rattikorn

doi:10.1016/j.jpowsour.2021.230517

Cited by 15 publications

(18 citation statements)

References 56 publications

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“…Supercapacitors rely on two types of capacitance for charge storage: electrical double-layer capacitance (EDLC) and pseudocapacitance. , Carbon derivatives (carbon nanotubes, activated carbon, and graphene) are promising candidates for electrodes in EDLC-based supercapacitors, which is characterized as a non-Faradaic process that makes use of the charge separation at interfaces between electrodes and electrolytes (by the formation of the Helmholtz layer), thereby making a high surface area necessary to separate charges. Among the carbonaceous materials, graphene appears as a potential candidate, with good electrical conductivity and chemical and mechanical stability. − Different strategies have been conducted in graphene-based materials to reach outstanding performance in energy storage devices, such as from association with carbon nitride aerogel, nitrogen-doping procedures, , and the integration of biobased carbon aerogels with graphene dots …”

Section: Introductionmentioning

confidence: 99%

“…Among the carbonaceous materials, graphene appears as a potential candidate, with good electrical conductivity and chemical and mechanical stability. 13−15 Different strategies have been conducted in graphene-based materials to reach outstanding performance in energy storage devices, 16 such as from association with carbon nitride aerogel, 17 nitrogen-doping procedures, 18,19 and the integration of biobased carbon aerogels 20 with graphene dots. 21 Pseudocapacitance-based capacitors (usually made of metal oxide or conducting polymers) 12,22,23 can reach outstanding performance in terms of energy density compared with EDLC because energy can be stored within the bulk of the electrode as well as at the surface.…”

Section: Introductionmentioning

confidence: 99%

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Electrochemical Performance of N-Doped Carbon-Based Electrodes for Supercapacitors

Orlando

Lima

et al. 2022

ACS Appl. Electron. Mater.

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Capacitors are a ubiquitous component of many modern-day electronics that provide remote sensing, power conditioning, electrical noise filtering, signaling coupling or decoupling, and short-term memory storage. With the desire for flexible, smaller, and more powerful electronics, capacitors and other electrical components will have to be improved to meet these growing demands. Carbon-derived materials are good candidates for use as electrodes in electrochemical capacitors (i.e., supercapacitors) because of their nanoscale and flexible architecture. However, implementations of these materials tend to have inferior specific capacitance and energy density compared with other options. In this work, different carbon derivatives (graphene oxide, Claisen graphene, activated charcoal oxide, and activated charcoal Claisen) were chemically modified via nitrogen doping to optimize the capacitance, power density, energy density, and the overall electrochemical performance of the resulting supercapacitors. Devices with a two-electrode configuration were assembled and confirmed the superior performance for all N-doped carbon derivatives in all analyzed parameters (specific capacitance, energy density, and power density) when compared with their undoped counterparts. The maximum areal capacitance obtained was 421.44 mF/cm2 for the N-doped activated charcoal oxide, which represents an improvement of 242.2% in comparison with the corresponding nonmodified sample, in addition to a 153% improvement in the energy density and strong retention in specific capacitance (in the order of 86% at 1000 cycles of operation).

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Electrochemical Performance of N-Doped Carbon-Based Electrodes for Supercapacitors

Orlando

Lima

et al. 2022

ACS Appl. Electron. Mater.

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“…The GO was prepared via the modified Hummers method. , Fine mesh 2 g graphite powder (∼6 nm) was stirred with 2 g NaNO 3 in 98% concentrated sulfuric acid (92 mL) for 1 h at 0 °C. Further, 12 g KMnO 4 was gradually mixed in intervals, keeping the temperature below 10 °C, and the mixture was then stirred at 60 °C for 90 min.…”

Section: Methodsmentioning

confidence: 99%

Property Modulation of Graphene Oxide Incorporated with TiO₂ for Dye-Sensitized Solar Cells

et al. 2022

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Graphene oxide (GO) nano-powder is synthesized by the modified Hummer's method, and further thin films are deposited by using the water solution of GO through spin-coating. These films are thermally reduced along with the synthesized GO nano-powder at 50 to 200 °C in a high vacuum. Microstructural, electrical, and optical properties are expectedly controlled by thermal reduction. The electronic properties of GO are investigated by X-ray photoelectron spectroscopy and near-edge X-ray absorption fine structure. The reduction is confirmed by Raman spectroscopy. The work function and band gap of GO are tuned with the thermal reduction. The changes in properties of GO are not linear, and anomalous changes are observed for the reduction around 150 °C. Pristine and reduced GO nano-powder is incorporated into TiO 2 paste to be the photoanode for dye-sensitized solar cells (DSSCs). It is observed that the performance of the fabricated cells is significantly enhanced for the GO reduced at 150 °C, and the cell exhibited a significant increment of ∼23% for the power conversion efficiency in comparison to DSSC based on an unmodified TiO 2 photoanode.

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“…33 Then, GO was hydrothermally treated with 40% (w/ v) urea (25 mL) to produce N-rGO similar to GO. 33 Next, N-rGO (2 g) was combined with polyvinylidene fluoride (0.4 g) and carbon black (0.27 g) in N-methyl-2-pyrrolidone (25 mL), and the mixture was ball-milled at 1000 rpm for 1 h until a homogeneous paste was obtained. The paste was then screenprinted using the doctor blade method, and then the electrode was dried overnight at room temperature.…”

Section: Experiments and Measurementsmentioning

confidence: 99%

“…A more detailed description of the electrode preparation can be found in our previously published work. 33 To prepare a redox-mediated electrolyte, 1.5 g of PPD was added to 100 mL of a 2 M KOH solution, designated as the KOH-PPD electrolyte. All electrochemical measurements were done using 2 M KOH as an electrolyte for comparison.…”

Section: Experiments and Measurementsmentioning

confidence: 99%

Violet Laser Treatment of Nitrogen-Doped Reduced Graphene Oxide Electrodes and KOH Electrolytes Containing p-Phenylenediamine for High-Performance Supercapacitors

Nathabumroong

Poochai

Mensing

et al. 2023

ACS Appl. Nano Mater.

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The electrical conductivity and capacitive behavior of supercapacitors (SCs) were found to be improved by the synergistic effects of the violet laser treatment (VLT) of nitrogen-doped reduced graphene oxide (N-rGO) as an electrode and 1.5% (w/v) p-phenylenediamine (PPD)-containing KOH as a redox electrolyte. The SC employing VLT treatment on the N-rGO electrode with 2 M KOH (N-rGO-V) represented a greater specific capacitance of up to 263.6 F g–1 compared to N-rGO in the same electrolyte, which was 232.2 F g–1 at 0.25 A g–1. To further improve the charge-storage ability, the SC using the VLT treatment on the N-rGO electrode with the PPD addition into 2 M KOH (N-rGO-V-PPD) revealed the highest specific capacitance, reaching 593.7 F g–1 at 0.25 A g–1 or 28.6% compared to N-rGO in the same redox electrolyte (N-rGO-PPD). Furthermore, the capacitance retention after 10,000 cycles of N-rGO-V-PPD remained at 62% (265 F g–1 at 100 mV s–1), which is still significantly higher than that of other samples, and the VLT technique provided a lower self-discharge rate. According to the physical characterizations, N-rGO-V-PPD has a rougher and larger surface area due to the exfoliated graphene oxide sheets and has a modest increase in the number of quinone/carbonyl functional groups in the graphene material, resulting in better electrical conductivity. All of these could be contributing factors to the performance improvement. Lastly, PPD provides redox mediators such as H+ and e– in the redox electrolyte, which are anticipated to improve the charge storage.

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Enhanced surface and electrochemical properties of nitrogen-doped reduced graphene oxide by violet laser treatment for high charge storage and lower self-discharge supercapacitors

Cited by 15 publications

References 56 publications

Electrochemical Performance of N-Doped Carbon-Based Electrodes for Supercapacitors

Electrochemical Performance of N-Doped Carbon-Based Electrodes for Supercapacitors

Property Modulation of Graphene Oxide Incorporated with TiO₂ for Dye-Sensitized Solar Cells

Violet Laser Treatment of Nitrogen-Doped Reduced Graphene Oxide Electrodes and KOH Electrolytes Containing p-Phenylenediamine for High-Performance Supercapacitors

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Enhanced surface and electrochemical properties of nitrogen-doped reduced graphene oxide by violet laser treatment for high charge storage and lower self-discharge supercapacitors

Cited by 15 publications

References 56 publications

Electrochemical Performance of N-Doped Carbon-Based Electrodes for Supercapacitors

Electrochemical Performance of N-Doped Carbon-Based Electrodes for Supercapacitors

Property Modulation of Graphene Oxide Incorporated with TiO2 for Dye-Sensitized Solar Cells

Violet Laser Treatment of Nitrogen-Doped Reduced Graphene Oxide Electrodes and KOH Electrolytes Containing p-Phenylenediamine for High-Performance Supercapacitors

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Property Modulation of Graphene Oxide Incorporated with TiO₂ for Dye-Sensitized Solar Cells