Unusual battery type pseudocapacitive behaviour of graphene oxynitride electrode: High energy solid-state asymmetric supercapacitor

Prakash, D.; Manivannan, S.

doi:10.1016/j.jallcom.2020.156853

Cited by 29 publications

(20 citation statements)

References 30 publications

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“…This resulted from the Ppy effect as a conducting polymer which proposed to have a redox behavior. Ppy1%-DBSA2%/NiO97%-GS@4 and Ppy1%-DBSA2%/NiO97%-GS@6 have more vertical slopes demonstrating that they possess low diffusion resistances and contact resistances between Ppy/NiO and the GS substrate 42 , 43 . These results are consistent and match well with the results obtained with SEM, CV, and GCD.…”

Section: Resultsmentioning

confidence: 99%

One-step electrodeposition of a polypyrrole/NiO nanocomposite as a supercapacitor electrode

Nady

Shokry

Khalil

et al. 2022

Sci Rep

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An electrochemical deposition technique was used to fabricate polypyrrole (Ppy)/NiO nanocomposite electrodes for supercapacitors. The nanocomposite electrodes were characterized and investigated by Fourier transform infrared spectroscopy (FTIR), X-ray Diffraction (XRD), scanning electron microscopy (SEM), cyclic voltammetry (CV), galvanostatic charge–discharge (GCD) and electrochemical impedance spectroscopy (EIS). The performance of supercapacitor electrodes of Ppy/NiO nanocomposite was enhanced compared with pristine Ppy electrode. It was found that the Ppy/NiO electrode electrodeposited at 4 A/cm−2 demonstrated the highest specific capacitance of 679 Fg−1 at 1 Ag−1 with an energy density of 94.4 Wh kg−1 and power density of 500.74 W kg−1. Capacitance retention of 83.9% of its initial capacitance after 1000 cycles at 1 Ag−1 was obtained. The high electrochemical performance of Ppy/NiO was due to the synergistic effect of NiO and Ppy, where a rich pores network-like structure made the electrolyte ions more easily accessible for Faradic reactions. This work provided a simple approach for preparing organic–inorganic composite materials as high-performance electrode materials for electrochemical supercapacitors.

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Section: Resultsmentioning

confidence: 99%

One-step electrodeposition of a polypyrrole/NiO nanocomposite as a supercapacitor electrode

Nady

Shokry

Khalil

et al. 2022

Sci Rep

View full text Add to dashboard Cite

show abstract

“…This preparation method results in the formation of quaternary, pyrrolic, pyridinic, and pyridinic-N-oxides on graphene oxide (GO), which not only improves the capacitance owing to their positive charges but also enhances the electron transfer within the GO. A GON-based HSC exhibits a good cyclability of 5000 cycles with an 87% efficiency in PVA/KOH gel electrolytes and produces a 40 Wh kg −1 energy density at a 900 W kg −1 power density [ 59 ].…”

Section: Types Of Supercapacitorsmentioning

confidence: 99%

Recent Progress of 2D Layered Materials in Water-in-Salt/Deep Eutectic Solvent-Based Liquid Electrolytes for Supercapacitors

Melethil

Kumar

et al. 2023

Nanomaterials

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Supercapacitors are candidates with the greatest potential for use in sustainable energy resources. Extensive research is being carried out to improve the performances of state-of-art supercapacitors to meet our increased energy demands because of huge technological innovations in various fields. The development of high-performing materials for supercapacitor components such as electrodes, electrolytes, current collectors, and separators is inevitable. To boost research in materials design and production toward supercapacitors, the up-to-date collection of recent advancements is necessary for the benefit of active researchers. This review summarizes the most recent developments of water-in-salt (WIS) and deep eutectic solvents (DES), which are considered significant electrolyte systems to advance the energy density of supercapacitors, with a focus on two-dimensional layered nanomaterials. It provides a comprehensive survey of 2D materials (graphene, MXenes, and transition-metal oxides/dichalcogenides/sulfides) employed in supercapacitors using WIS/DES electrolytes. The synthesis and characterization of various 2D materials along with their electrochemical performances in WIS and DES electrolyte systems are described. In addition, the challenges and opportunities for the next-generation supercapacitor devices are summarily discussed.

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“…Owing to the rapid development of the global economy, accelerating the consumption of fossil fuels like coal, fuel, and natural gas, the problems of global climate change and environmental pollution are increasing to significant levels. Developing solar, wind, tidal, and other renewable clean energy is a way to mitigate current energy and environmental pollution problems [ 1 , 2 , 3 , 4 , 5 , 6 ]. However, those renewable clean forms of energy are severely restricted by environmental factors and energy supply is intermittent [ 7 ].…”

Section: Introductionmentioning

confidence: 99%

“…At present, the low energy density is still the bottleneck of supercapacitors [23,24]. According to the energy density formula, E = 1 2 × C × V 2 , where E represents the energy density, C represents the specific capacitance, and V represents the potential window, we can know that the energy density of a In addition, they demonstrate a reversible capacity of~3.85 mAh cm −2 at the current density of 100 mA cm −2 as a Li-ion batteries electrode. The excellent electrochemical performance lies in the synergistic effect of metal oxide NRs and the unique structure of CNTS-CC.…”

Section: Introductionmentioning

confidence: 99%

Transition Metal Oxide Electrode Materials for Supercapacitors: A Review of Recent Developments

et al. 2021

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In the past decades, the energy consumption of nonrenewable fossil fuels has been increasing, which severely threatens human life. Thus, it is very urgent to develop renewable and reliable energy storage devices with features of environmental harmlessness and low cost. High power density, excellent cycle stability, and a fast charge/discharge process make supercapacitors a promising energy device. However, the energy density of supercapacitors is still less than that of ordinary batteries. As is known to all, the electrochemical performance of supercapacitors is largely dependent on electrode materials. In this review, we firstly introduced six typical transition metal oxides (TMOs) for supercapacitor electrodes, including RuO2, Co3O4, MnO2, ZnO, XCo2O4 (X = Mn, Cu, Ni), and AMoO4 (A = Co, Mn, Ni, Zn). Secondly, the problems of these TMOs in practical application are presented and the corresponding feasible solutions are clarified. Then, we summarize the latest developments of the six TMOs for supercapacitor electrodes. Finally, we discuss the developing trend of supercapacitors and give some recommendations for the future of supercapacitors.

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Unusual battery type pseudocapacitive behaviour of graphene oxynitride electrode: High energy solid-state asymmetric supercapacitor

Cited by 29 publications

References 30 publications

One-step electrodeposition of a polypyrrole/NiO nanocomposite as a supercapacitor electrode

One-step electrodeposition of a polypyrrole/NiO nanocomposite as a supercapacitor electrode

Recent Progress of 2D Layered Materials in Water-in-Salt/Deep Eutectic Solvent-Based Liquid Electrolytes for Supercapacitors

Transition Metal Oxide Electrode Materials for Supercapacitors: A Review of Recent Developments

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