Effect of NiO/Ni(OH)2 nanostructures in graphene/CNT nanocomposites on their interfacial charge transport kinetics for high-performance supercapacitors

Palani, N. S.; Kavitha, N.; Venkatesh, K. S.; Kumar, K. Ashok; Thirumal, V.; Pandurangan, A.; Sekar, C.; Ilangovan, R.

doi:10.1007/s10008-018-4032-x

Cited by 25 publications

(12 citation statements)

References 43 publications

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“…41 A further increase in temperature, that is, above 1000 C, and the Cu nanoparticles melt, hence the anchoring of copper on the carbon lattice of graphene is difficult. 42,43 Using the soware XRDA 3.1 the lattice parameters were estimated for the corresponding peaks which were found to be a 3 for CuBG2 and 3.6191 AE 0.0015Å with cell volume V ¼ 47.403Å 3 for CuBG4. Using the Debye-Scherrer equation the crystallite sizes of the prepared samples were calculated using the formula:…”

Section: Positive Electrode Materialsmentioning

confidence: 99%

“…1,2 Pseudo capacitors and electrical double layer capacitors (EDLCs) are the two categories of supercapacitor electrode materials owing to their fast reduction, oxidation and reversible reaction pseudocapacitance that can produce a higher capacitance and energy density than EDLCs. [3][4][5] Owing to the presence of the functional groups containing oxygen, graphene demonstrates a higher capacitance. To increase the energy density and potential window of the working device, electrode materials play a vital role in a supercapacitor.…”

Section: Introductionmentioning

confidence: 99%

“…To increase the energy density and potential window of the working device, electrode materials play a vital role in a supercapacitor. 6 As the alloys and noble metals are very costly and have poisoning effects, 7 low-cost nanostructures of transition metal oxides, such as NiO, 3 CuO, 8 Fe 2 O 3 , Gd 9 and Co 3 O 4 10 are often used for high storage supercapacitors. Owing to the large surface area, chemical stability and high conductivity graphene is used as a substrate for the metals and metal oxides.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Copper nanoparticles anchored onto boron-doped graphene nanosheets for use as a high performance asymmetric solid-state supercapacitor

Pandian

Pandurangan

2019

RSC Adv.

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Section: Positive Electrode Materialsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Copper nanoparticles anchored onto boron-doped graphene nanosheets for use as a high performance asymmetric solid-state supercapacitor

Pandian

Pandurangan

2019

RSC Adv.

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“…Most of the commercial SCs are made up of carbon materials with various forms are utilized as electrode materials for supercapacitor (Electrical double layer) owing to their superior electrical conductivity, stable electrochemical properties, excellent cyclic stability, low cost, and environmental friendliness [5][6][7][8][9][10] rather than complex, high cost, and low conducting redox behavior electrode materials [11][12][13]. However, the current carbon-based SCs often suffer from its relatively low energy density (typically 5-7 Wh kg -1 for commercial supercapacitors), limiting their wide area of applications [14][15][16]. Nowadays, researchers put tremendous effort to progress the energy density of supercapacitors simultaneously ensuring power density and life cycle are not affected.…”

Section: Introductionmentioning

confidence: 99%

Simple CVD growth of P-doped graphitic hallow carbon spheres for high-voltage (2.0 V) aqueous symmetric supercapacitor

Govindarasu

Boopathi

Venkatesan

et al. 2021

J Mater Sci: Mater Electron

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Doping of heteroatom into well-structured mesoporous carbon architecture can significantly augment the capacitive performance. In this work, we report P-doped graphitic hollow carbon spheres (P-GHCS) grown over Fe-KIT-6 through the in situ approach using the catalytic CVD technique. The obtained P-GHCS possesses a relatively high surface area with uniform mesoporous structure, good graphitization with tunable P-doping contents. The highly favorable structure and desirable heteroatom doping were taken into account to evaluate the P-GHCS as a modified electrode material towards high-performance supercapacitor. The optimized P-GHCS-800 sample exhibits superior specific capacitance (Csp) 321 F g−1 at 0.2 A g−1 with outstanding cycling stability with 2.9% loss of its initial capacitance after 2000 cycles in 6 M KOH electrolyte background in the three-electrode computerized system. More importantly, the fabricated P-GHCS-800 symmetric supercapacitor device can withstand at a wide potential width of 2.0 V, together with remarkable cyclic stability (89.09%) after 2000 cycles at a current density of 1 A g−1 in aqueous 1 M Na2SO4 as electrolyte providing a relatively high energy density of 10.83 Wh kg−1 with a power density of 222.78 W kg−1. Additionally, we demonstrated the single symmetric supercapacitor cell which provided sufficient energy to turn on a red LED of 20 mW and emit light over a certain period of time opens up possible realistic applications.

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“…Considerable scientific attention has been directed towards the use of NiO-based electrodes in high-performance ECs, because of the low-cost and facile synthesis with a diversity of approaches [ 14 , 21 , 22 , 23 , 24 , 25 ]. Some reports suggested that the nickel hydroxide can also be successfully used as the material for electrochemical supercapacitors [ 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 ]. However, its electrochemical performance suggests somewhat hybrid energy storage mechanisms in the devices exploiting this material [ 20 ].…”

Section: Introductionmentioning

confidence: 99%

Polypyrrole–Nickel Hydroxide Hybrid Nanowires as Future Materials for Energy Storage

et al. 2019

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Hybrid materials play an essential role in the development of the energy storage technologies since a multi-constituent system merges the properties of the individual components. Apart from new features and enhanced performance, such an approach quite often allows the drawbacks of single components to be diminished or reduced entirely. The goal of this paper was to prepare and characterize polymer-metal hydroxide (polypyrrole-nickel hydroxide, PPy-Ni(OH)2) nanowire arrays demonstrating good electrochemical performance. Nanowires were fabricated by potential pulse electrodeposition of pyrrole and nickel hydroxide into nanoporous anodic alumina oxide (AAO) template. The structural features of as-obtained PPy-Ni(OH)2 hybrid nanowires were characterized using FE-SEM and TEM analysis. Their chemical composition was confirmed by energy-dispersive x-ray spectroscopy (EDS). The presence of nickel hydroxide in the synthesized PPy-Ni(OH)2 nanowire array was investigated by X-ray photoelectron spectroscopy (XPS). Both FE-SEM and TEM analyses confirmed that the obtained nanowires were composed of a polymer matrix with nanoparticles dispersed within. EDS and XPS techniques confirmed the presence of PPy-Ni(OH)2 in the nanowire array obtained. Optimal working potential range (i.e., available potential window), charge propagation, and cyclic stability of the electrodes were determined with cyclic voltammetry (CV) at various scan rates. Interestingly, the electrochemical stability window for the aqueous electrolyte at PPy-Ni(OH)2 nanowire array electrode was remarkably wider (ca. 2 times) in comparison with the non-modified PPy electrode. The capacitance values, calculated from cyclic voltammetry performed at 20 mV s−1, were 25 F cm−2 for PPy and 75 F cm−2 for PPy-Ni(OH)2 array electrodes. The cyclic stability of the PPy nanowire array electrode up to 100 cycles showed a capacitance fade of about 13%.

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Effect of NiO/Ni(OH)2 nanostructures in graphene/CNT nanocomposites on their interfacial charge transport kinetics for high-performance supercapacitors

Cited by 25 publications

References 43 publications

Copper nanoparticles anchored onto boron-doped graphene nanosheets for use as a high performance asymmetric solid-state supercapacitor

Copper nanoparticles anchored onto boron-doped graphene nanosheets for use as a high performance asymmetric solid-state supercapacitor

Simple CVD growth of P-doped graphitic hallow carbon spheres for high-voltage (2.0 V) aqueous symmetric supercapacitor

Polypyrrole–Nickel Hydroxide Hybrid Nanowires as Future Materials for Energy Storage

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