Asymmetric supercapacitors based on the in situ-grown mesoporous nickel oxide and activated carbon

Yin, Jun; Park, J. Y.

doi:10.1007/s10008-015-2885-9

Cited by 13 publications

(7 citation statements)

References 36 publications

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“…Instead of the mechanical pressing, the direct growth of active materials on the metal scaffolds can make full use of their inherently high surface area. [334][335][336][337][338][339][340][341] Liu et al [342] developed a 3D…”

Section: Carbon-cloth-materials Configurationmentioning

confidence: 99%

Asymmetric Supercapacitor Electrodes and Devices

et al. 2017

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The world is recently witnessing an explosive development of novel electronic and optoelectronic devices that demand more-reliable power sources that combine higher energy density and longer-term durability. Supercapacitors have become one of the most promising energy-storage systems, as they present multifold advantages of high power density, fast charging-discharging, and long cyclic stability. However, the intrinsically low energy density inherent to traditional supercapacitors severely limits their widespread applications, triggering researchers to explore new types of supercapacitors with improved performance. Asymmetric supercapacitors (ASCs) assembled using two dissimilar electrode materials offer a distinct advantage of wide operational voltage window, and thereby significantly enhance the energy density. Recent progress made in the field of ASCs is critically reviewed, with the main focus on an extensive survey of the materials developed for ASC electrodes, as well as covering the progress made in the fabrication of ASC devices over the last few decades. Current challenges and a future outlook of the field of ASCs are also discussed.

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Section: Carbon-cloth-materials Configurationmentioning

confidence: 99%

Asymmetric Supercapacitor Electrodes and Devices

et al. 2017

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“…The NiO film electrodes were analyzed in a three-electrode cell using 2 M KOH as electrolyte (Figure ). The cyclic voltammetry (CV) plot (Figures a and S1) shows the oxidation and reduction peaks due to the reversible reaction between Ni 2+ and Ni 3+ states. ,,, The CV plot shows well-defined redox peaks at a high scan rate, revealing good reversibility. The quasitriangular shapes with a hunchback in the chronopotentiometry (CP) plot (Figure b) are consistent with the faradic reactions, in a charge–discharge process.…”

Section: Resultsmentioning

confidence: 99%

“…Also, there were reports of composite electrode, made by slurry-coating the current collecting substrate with a mixture of NiO electrospun nanofiber, activated carbon, and binder for superior electrochemical performance. The asymmetric SCs with NiO–carbon pair of electrodes showed a voltage stability window from 1.4 to 1.7 V, which enhances the specific energy of the cell. ,,− …”

Section: Introductionmentioning

confidence: 99%

“…Also, transition-metal carbides and nitrides (MXenes), oxynitrides, and chalcogenides are emerging as a new class of electrode materials for faradic charge storage. Further, the arrangement of dissimilar electrodes (asymmetric SCs) makes use of different potential windows of the two electrodes to maximize operating cell voltage, resulting in enhanced capacitance and energy density. ,− …”

Section: Introductionmentioning

confidence: 99%

“…In prior art, the preparation of NiO electrode by electrodeposition, ,, sol–gel based electrospinning, pulsed laser deposition, template/surfactant directed synthesis, , electroplating, and hydrothermal method was reported. The active layer of the electrode was applied with the binder to the current collecting substrate in some cases.…”

Section: Introductionmentioning

confidence: 99%

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Growth of Film Electrodes through Electrospray Coating of Precursor Sol for Use in Asymmetric Supercapacitor

Chavhan

Sethi

Ganguly

2020

Ind. Eng. Chem. Res.

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Nanoparticulate films of NiO and carbon are fabricated by electrospray coating of respective aqueous precursors on Ni foam. The adhesion of the active layers to the substrate during solvent evaporation, calcination, or carbonization is demonstrated for both types of electrodes. The effect of metal precursor composition and calcination temperature is analyzed through X-ray diffraction (XRD), scanning electron microscopy (SEM), and electrochemical techniques. The capacitance of NiO and carbon film electrodes is found to be 343 mF cm–2 (286 F g–1) and 118 mF cm–2 (118 F g–1), respectively at a current density of 1 mA cm–2. The supercapacitor in an asymmetric setup delivers specific energy and specific power to the levels of 12.6 Wh kg–1 and 1.7 kW kg–1 respectively, with the capacitance retention of 88% after 2000 cycles at 5 mA cm–2.

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