Porous cobalt hydroxide nanosheets with excellent supercapacitive behavior

Barmi, Abbas-Ali Malek; Aghazadeh, Mustafa; Arhami, Behzad; Shiri, Hamid Mohammad; Fazl, Alireza Amini; Jangju, Esmaeil

doi:10.1016/j.cplett.2012.05.038

Cited by 66 publications

(8 citation statements)

References 40 publications

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“…25 The peak at 1652 cm À1 is due to the bending mode of water molecules. 31 Additionally, the absorption band centered at 3633 cm À1 is ascribed to the n O-H stretching of the OH groups in the brucite-like structure, 31 while the elemental analysis reveals that the mass percentage of C decreases to 6.50% compared with 31.21% in the Co-Ni-MOF, which indicates that the hydroxide ions take the place of carboxyl organic ligands, forming Ni x Co 1Àx (OH) 2 composite as the result of this transformation. 25 The Raman spectra of the Co-Ni-MOF and MOF-derived Ni x Co 1Àx (OH) 2 composites are exhibited in Fig.…”

Section: Resultsmentioning

confidence: 99%

MOF-derived Ni_xCo_1−x(OH)₂ composite microspheres for high-performance supercapacitors

Wang

et al. 2016

RSC Adv.

108

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Section: Resultsmentioning

confidence: 99%

MOF-derived Ni_xCo_1−x(OH)₂ composite microspheres for high-performance supercapacitors

Wang

et al. 2016

RSC Adv.

108

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“…[1][2][3][4][5] Among these transition metal hydroxide nanomaterials, cobalt hydroxides have attracted much interest for their potential use in sensors, 6 catalysis, 7 as supercapacitors [8][9][10] and magnetic materials 11 because of their exceptional physical and chemical properties. Cobalt hydroxides can be synthesized by diverse techniques such as the hydrothermal method, 12,13 cathodic electrodeposition, 14 sol-gel technique, 15 pulsed laser deposition 16 and so on. Almost all the attention thus far has focused on crystalline cobalt hydroxides and compounds derived from these materials mainly because of their exibility in forming complex three-dimensional structures and their excellent magnetic properties.…”

Section: Introductionmentioning

confidence: 99%

Amorphous cobalt hydroxide nanostructures and magnetism from green electrochemistry

Liu

Liang

et al. 2013

RSC Adv.

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Amorphous cobalt hydroxide nanostructures have been synthesized by a simple and green electrochemistry technique. Magnetism measurements showed that the as-synthesized amorphous cobalt hydroxide nanoparticles are ferromagnetic under the Curie temperature of 10 K with high magnetization of 30 emu g À1 and an exchange bias field of 100 Oe at 5 K. These findings may lead to novel applications of the amorphous cobalt hydroxide nanostructures as magnetic materials.

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“…The electrochemical synthesis can be represented as a two-process step. The first step is associated with an OH − electrogeneration over the interface of the electrode/substrate, as suggested by reactions (5) and (6), followed by Co ion precipitation due to complexation with the high concentration of OH − as a result of the polarization in the electrode-electrolyte interface, as shown by the electrochemical precipitation reactions (7) and (8) [22]. The intermediate steps between reactions suggest the path to ion insertion in the hydroxyl matrix of the as-deposited materials, in this case, the NO 3 -.…”

Section: Electrochemical Characterization Of the As-deposited Materialsmentioning

confidence: 99%

Electrochemical Assessment of As-Deposited Co(OH)2 by Electrochemical Synthesis: The Effect of Synthesis Temperature on Performance

et al. 2019

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In this paper, the influence of an electrolytic temperature bath was used in the electrodeposition process on the size, color, and shape of the as-deposited Co(OH)2, and the electrochemical performance was investigated. Three different temperatures of 25, 60, and 95 °C were evaluated for the electrodeposition of Co(OH)2 on stainless steel plates (SSP). The electrochemical performance of the as-deposited electrodes (SSP) was measured in a symmetric electrochemical cell (EC) arrangement. XRD, SEM, and N2 physisorption analyses were carried out to evaluate the structure and morphological composition, along with the textural properties. Results showed that the hexagonal platelet micro-clusters of Co(OH)2 are formed in a mixed composition of both α-Co(OH)2 and β-Co(OH)2 phases, with the α-Co(OH)2 phase being the major phase formed in the electrodeposition process at temperatures below 95 °C, as suggested by the XRD analysis. Electrochemical cell performances were evaluated by galvanostatic cycling, results showed maximum areal capacity values of 1.97, 2.69, and 4.34 mA h cm–2 at a charge/discharge current of 6.25mA cm–2, for the as-deposited materials at 25, 60 and 95 °C, respectively. The specific power of the EC reached up to 19 kW kg–1 for the EC obtained material at 60 °C, with a specific energy of 2.8 W h kg–1. The maximum specific energy was reached at a current density of 6.25 mA cm−2, with a value of 10.79 W h kg–1 for the EC at 60 °C. These results offer some insight into how the morphology and composition of thin films can be tuned by the electrochemical synthesis temperature, yielding different electrochemical performances and areal capacity behaviors.

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Porous cobalt hydroxide nanosheets with excellent supercapacitive behavior

Cited by 66 publications

References 40 publications

MOF-derived Ni_xCo_1−x(OH)₂ composite microspheres for high-performance supercapacitors

MOF-derived Ni_xCo_1−x(OH)₂ composite microspheres for high-performance supercapacitors

Amorphous cobalt hydroxide nanostructures and magnetism from green electrochemistry

Electrochemical Assessment of As-Deposited Co(OH)2 by Electrochemical Synthesis: The Effect of Synthesis Temperature on Performance

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Porous cobalt hydroxide nanosheets with excellent supercapacitive behavior

Cited by 66 publications

References 40 publications

MOF-derived NixCo1−x(OH)2 composite microspheres for high-performance supercapacitors

MOF-derived NixCo1−x(OH)2 composite microspheres for high-performance supercapacitors

Amorphous cobalt hydroxide nanostructures and magnetism from green electrochemistry

Electrochemical Assessment of As-Deposited Co(OH)2 by Electrochemical Synthesis: The Effect of Synthesis Temperature on Performance

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MOF-derived Ni_xCo_1−x(OH)₂ composite microspheres for high-performance supercapacitors

MOF-derived Ni_xCo_1−x(OH)₂ composite microspheres for high-performance supercapacitors