Asymmetric supercapacitors based on stabilized α-Ni(OH)2 and activated carbon

Lang, Junwei; Kong, Ling‐Bin; Liu, Min; Luo, Yan‐Ling; Kang, Long

doi:10.1007/s10008-009-0984-1

Cited by 197 publications

(128 citation statements)

References 34 publications

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“…The nickel oxide electrode with Ni(OH) 2 as an active material is used as a Faradic electrode for hybrid supercapacitors. Nickel hydroxide is used on its own [3], as nano-sized [4] or ultrafine powder [5] and as a composite with carbon nanomaterials (graphene [6], carbon nanotubes [7]). …”

Section: Introductionmentioning

confidence: 99%

Study of the influence of the template concentration under homogeneous precepitation on the properties of Ni(OH)2 for supercapacitors

Кovalenko

Kotok

2017

EEJET

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Section: Introductionmentioning

confidence: 99%

Study of the influence of the template concentration under homogeneous precepitation on the properties of Ni(OH)2 for supercapacitors

Кovalenko

Kotok

2017

EEJET

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“…Nickel oxide (NiO) is a chemically stable material with semiconducting properties of p-type, [1] which is used as electroactive component in several important technologies ranging from batteries [2] to electrochromic windows, [3] [4] and, more recently, from water splitting electrolysers [5] [6] to dye-sensitized solar cells (DSCs) [7] [8] among others [9]. Such a wide applicability of NiO relies on the possibility of modulating its electrical conductivity and optical transmission (when in the configuration of transparent thin films with thickness l < 3 μm) in a controlled fashion by means of electrical fields, chemical/electrochemical doping [3] [4] or irradiation in the UV-visible spectrum [10].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Characterization of Rapid Discharge Sintering (RDS) NiO Cathodes for Dye-Sensitized Solar Cells of <i>p</i>-Type

Novelli¹,

Awais²,

Dowling³

et al. 2015

AJAC

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Nickel oxide (NiO) thin films with thickness ranging in the interval 0.2 -3.5 μm have been deposited onto conductive transparent substrate via the method of plasma-assisted rapid discharge sintering (RDS) with microwave heating starting from NiO nanoparticles with diameter 50 nm. The optical and electrochemical properties of the RDS NiO films in the pristine state were characterized in non aqueous electrolyte with the solvent 3-methoxy-propionitrile (3-MPN). Upon electrochemical cycling of NiO in 3-MPN we observed two characteristic oxidation peaks referring to the two nickel centred processes Ni(II)→Ni(III) and Ni(III)→Ni(IV), which are both localized prevalently on the surface of the metallic oxide. The oxide films prepared with the RDS method were also sensitized with different types of commercial dyes, either organometallic (N719, black dye) or organic (squaraine 2, erythrosine B), to compare the corresponding p-type dye-sensitized solar cells (p-DSCs). All dyes here employed matched the energies of their frontier orbitals with the upper edge of NiO valence band and the redox level of the triiodide/iodide couple. The comparison of the performances of the p-DSCs based on RDS NiO which differed exclusively for the nature of the sensitizer showed that the extent of electronic conjugation in the structure of the dye is crucial for the control of the photovoltaic performance of the corresponding p-DSC.

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“…3,4 The intrinsic p-type conductivity of NiO x is mainly related to its non-stoichiometric nature where Ni 3+ centers constitute the oxide defects through which holes are transferred. 5 Because of this interesting combination of electrical and optical properties, NiO x has been considered for energy storage applications, [6][7][8] in electrochromic devices as transparent electrode, 9-17 in optoelectronic devices as electron barrier, 18,19 for gas sensing, 20,21 and, more recently, in dye-sensitized solar cells (DSCs) as photoactive cathode. [22][23][24][25][26][27][28][29][30][31][32][33][34][35] The utilization of NiO x in such diverse applications has been accompanied by the development of various preparation methods and deposition techniques, aimed at producing NiO x -based materials with variable chemical composition, electrical resistivity, compactness and morphology.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical characterization of NiO electrodes deposited via a scalable powder microblasting technique

Awais

Dini

MacElroy

et al. 2013

Journal of Electroanalytical Chemistry

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Publication information Journal of Electroanalytical Chemistry, Publisher Elsevier The UCD community has made this article openly available. Please share how this access benefits you. Your story matters! (@ucd_oa) Some rights reserved. For more information, please see the item record link above. In this contribution a novel powder coating processing technique (microblasting) for the fabrication of nickel oxide (NiOx) coatings is reported. ∼1.2 μm thick NiOx coatings are deposited at 20 mm2 s−1 by the bombardment of the NiOx powder onto a Ni sheet using an air jet at a speed of more than 180 m s−1. Microblast deposited NiOx coatings can be prepared at a high processing rate, do not need further thermal treatment. Therefore, this scalable method is time and energy efficient. The mechano-chemical bonding between the powder particles and substrate results in the formation of strongly adherent NiOx coatings. Microstructural analyses were carried out using SEM, the chemical composition and coatings orientation were determined by XPS and XRD, respectively. The electroactivity of the microblast deposited NiOx coatings was compared with that of NiOx coatings obtained by sintering NiOx nanoparticles previously sprayed onto Ni sheets. In the absence of a redox mediator in the electrolyte, the reduction current of microblast deposited NiOx coatings, when analyzed in anhydrous environment, was two times larger than that produced by higher porosity NiOx nanoparticles coatings of the same thickness obtained through spray coating followed by sintering. Under analogous experimental conditions thin layers of NiOx obtained by using the sol-gel method, ultrasonic spray-and electro-deposition show generally lower current density with respect to microblast samples of the same thickness. The electrochemical reduction of NiOx coatings is controlled by the bulk characteristics of the oxide and the relatively ordered structure of microblast NiOx coatings with respect to sintered NiOx nanoparticles here considered, is expected to increase the electron mobility and ionic charge diffusion lengths in the microblast samples. Finally, the increased level of adhesion of the microblast film on the metallic substrate affords a good electrical contact at the metal/metal oxide interface, and constitutes another reason in support of the choice of microblast as low-cost and scalable deposition method for oxide layers to be employed in electrochemical applications. Electrochemical characterization of NiO electrodes deposited via a scalable powder microblasting technique

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Asymmetric supercapacitors based on stabilized α-Ni(OH)2 and activated carbon

Cited by 197 publications

References 34 publications

Study of the influence of the template concentration under homogeneous precepitation on the properties of Ni(OH)2 for supercapacitors

Study of the influence of the template concentration under homogeneous precepitation on the properties of Ni(OH)2 for supercapacitors

Electrochemical Characterization of Rapid Discharge Sintering (RDS) NiO Cathodes for Dye-Sensitized Solar Cells of <i>p</i>-Type

Electrochemical characterization of NiO electrodes deposited via a scalable powder microblasting technique

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Asymmetric supercapacitors based on stabilized α-Ni(OH)2 and activated carbon

Cited by 197 publications

References 34 publications

Study of the influence of the template concentration under homogeneous precepitation on the properties of Ni(OH)2 for supercapacitors

Study of the influence of the template concentration under homogeneous precepitation on the properties of Ni(OH)2 for supercapacitors

Electrochemical Characterization of Rapid Discharge Sintering (RDS) NiO Cathodes for Dye-Sensitized Solar Cells of &lt;i&gt;p&lt;/i&gt;-Type

Electrochemical characterization of NiO electrodes deposited via a scalable powder microblasting technique

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Electrochemical Characterization of Rapid Discharge Sintering (RDS) NiO Cathodes for Dye-Sensitized Solar Cells of <i>p</i>-Type