Chemical and structural stability of porous thin film NiO nanowire based electrodes for supercapacitors

Paravannoor, Anjali; Ranjusha, R.; Asha, A.; Vani, R. M.; Kalluri, Sujith; Subramanian, K. R. V.; Sivakumar, N.; Kim, T.N.; Nair, Shantikumar V.; Balakrishnan, Avinash

doi:10.1016/j.cej.2013.01.063

Cited by 80 publications

(31 citation statements)

References 31 publications

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“…Again, because of the diffusion-controlled redox reaction between the OH À ions and the NiO nanoparticles, the specific capacitance increases for lower charge-discharge rates. Although there are some reports showing much higher specific capacitances for NiO [34], the positively size-dependent capacitance behaviour must be taken into consideration in the research work for supercapacitor electrode materials.…”

Section: Resultsmentioning

confidence: 98%

Size-dependent capacitance of NiO nanoparticles synthesized from Ni-based coordination polymer precursors with different crystallinity

Wang

Shi

Zhang

et al. 2015

Journal of Alloys and Compounds

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Section: Resultsmentioning

confidence: 98%

Size-dependent capacitance of NiO nanoparticles synthesized from Ni-based coordination polymer precursors with different crystallinity

Wang

Shi

Zhang

et al. 2015

Journal of Alloys and Compounds

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“…[33,34] These nickel sites can facilitate the dispersion of carbon soot formed initially and may serve as catalysts, and hence, nucleation sites for the interconnected carbon nanobead structures, which can enhance crystallization of graphitic CDCs.…”

Section: Formation Of Nickel Oxalate Nanowiresmentioning

confidence: 99%

“…The formation of nickel oxalate nanowires can be expressed from Reactions (1) and (2), as we reported earlier: [34] …”

Section: Formation Of Nickel Oxalate Nanowiresmentioning

confidence: 99%

Camphoric Carbon‐Grafted Ni/NiO Nanowire Electrodes for High‐Performance Energy‐Storage Systems

Paravannoor¹,

Nair²,

Ranjusha³

et al. 2013

ChemPlusChem

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The present study provides the first report on the preparation and utilization of camphoric carbon nanobeads grafted onto Ni/NiO nanowires for rechargeable electrodes for energy‐storage applications. These functionally graded nanowires were electrophoretically deposited onto nickel foils and processed into high‐surface‐area electrodes. A detailed study has been performed to elucidate the effect of carbon content, different electrolytes, and their concentrations on these nanowires. BET surface area analysis revealed that these grafted nanowires could exhibit a high surface area of about 106 m2 g−1, compared with pristine nanowires, which exhibited a surface area of about 45 m2 g−1. From the analysis of relevant electrochemical parameters, an intrinsic correlation between the capacitance, internal resistance, and the surface morphology has been deduced. Relative contributions of capacitive and diffusion‐controlled processes underlying these thin‐film electrodes have been mathematically modeled. These thin‐film electrodes exhibited specific mass capacitance values as high as (1950±80) and (1140±60) F g−1, as determined from cyclic voltammetry and charge discharge curves, respectively; these values were 30–50 % higher than that of a pristine nanowire electrode. Furthermore, a working model button cell employing these rechargeable electrodes is also described, which exhibited energy and power densities of 83 and 75 Wh kg−1, respectively. This study shows that electrodes based on such nanowire/carbon nanobead configurations can allow significant room for improvement in energy density, power density, and cyclic stability of supercapacitor/battery systems.

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“…TEM samples 50 were prepared by drop coating of NiO-NPs dispersion in acetone on a holey carbon/copper grid and TEM was operated at 200 kV and 108 mA. The selected area electron diffraction pattern (SAEDP) was also recorded to verify the crystal structure of NiO-NPs.…”

Section: Materials Characterizationsmentioning

confidence: 99%

Electrochemical energy-storage performances of nickel oxide films prepared by a sparking method

et al. 2015

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In this work, nickel oxide (NiO) films have been prepared by a sparking method on a flexible chromium/gold coated polyethylene terephthalate substrates and investigated for electrochemical energystorage applications. Structural characterizations by scanning/transmission electron microscopies, X-ray 10 diffraction, X-ray photoelectron spectroscopy and UV-vis spectrophotometer reveal that the film comprises polycrstalline NiO nanoparticles with diameters in the range of 3.0-6.0 nm loosely agglomerated into porous foam-like network. The nanoporous sparked NiO films, exhibits remarkable energy-storage behavior with a high average specific charge capacity of 402.75 C g -1 at a discharge current of 1 A g -1 and a good capacity retention of 88% after 1000 cycles at a high discharge current of 40 15 A g -1 . Thus, the sparking method is a promising alternative route for the preparation of high-performance electrochemical energy-storage devices. 65 storage performances are investigated by cyclic voltammetry (CV) and galvanostatic charge-discharge (GCD) measurements. Materials and methodsThe schematic illustration of the sparking apparatus for the fabrication of NiO nanoparticles (NiO-NPs) and NiO films is 70

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Chemical and structural stability of porous thin film NiO nanowire based electrodes for supercapacitors

Cited by 80 publications

References 31 publications

Size-dependent capacitance of NiO nanoparticles synthesized from Ni-based coordination polymer precursors with different crystallinity

Size-dependent capacitance of NiO nanoparticles synthesized from Ni-based coordination polymer precursors with different crystallinity

Camphoric Carbon‐Grafted Ni/NiO Nanowire Electrodes for High‐Performance Energy‐Storage Systems

Electrochemical energy-storage performances of nickel oxide films prepared by a sparking method

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