Pseudocapacitive performance of a solution-processed β-Co(OH)2 electrode monitored through its surface morphology and area

P. S. Gaikar; S. T. Navale; S. L. Gaikwad; Ahmed Al-Osta; V. V. Jadhav; P. R. Arjunwadkar; Mu Naushad; Rajaram S. Mane

doi:10.1039/c6dt04581b

Pseudocapacitive performance of a solution-processed β-Co(OH)₂ electrode monitored through its surface morphology and area

P. S. Gaikar, S. T. Navale, S. L. Gaikwad, Ahmed Al-Osta, V. V. Jadhav, P. R. Arjunwadkar^*, Mu Naushad, Rajaram S. Mane

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

18 Scopus citations

Abstract

In the present study, beta-cobalt hydroxide (β-Co(OH)₂) electrodes of various nanostructures and surface areas, viz. nano-rhombuses (NRs), nano-plates (NPs), and nano-grass (NGs), have been synthesized directly onto a stainless-steel (SS) substrate using a simple, economical and binder-free chemical solution-process, utilizing three cobalt precursor salts, i.e. cobalt acetate, cobalt chloride, and cobalt nitrate, respectively. Structural elucidation proves the crystallite size, type and phase-purity of β-Co(OH)₂, whereas the surface morphology analysis supports the evolution of the above mentioned nanostructures of various surface areas. The electrochemical pseudocapacitor performance investigation demonstrates a specific capacitance (S_c) of 367 F g⁻¹ at 1 mA cm⁻² for the NP-type morphology, which is higher than that that displayed by the other morphologies. This change in S_c value is attributed to different charge transfer resistance values, which have been obtained from electrochemical impedance spectroscopy spectra. Finally, we attempt to correlate the relationship between the surface morphology, i.e. surface area, and the charge transfer resistance with the obtained specific capacitance value of the respective electrode.

Original language	English
Pages (from-to)	3393-3399
Number of pages	7
Journal	Dalton Transactions
Volume	46
Issue number	10
DOIs	https://doi.org/10.1039/c6dt04581b
State	Published - 2017
Externally published	Yes

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@article{cad857c1e3c04504bcf2166d5c22a2bb,

title = "Pseudocapacitive performance of a solution-processed β-Co(OH)2 electrode monitored through its surface morphology and area",

abstract = "In the present study, beta-cobalt hydroxide (β-Co(OH)2) electrodes of various nanostructures and surface areas, viz. nano-rhombuses (NRs), nano-plates (NPs), and nano-grass (NGs), have been synthesized directly onto a stainless-steel (SS) substrate using a simple, economical and binder-free chemical solution-process, utilizing three cobalt precursor salts, i.e. cobalt acetate, cobalt chloride, and cobalt nitrate, respectively. Structural elucidation proves the crystallite size, type and phase-purity of β-Co(OH)2, whereas the surface morphology analysis supports the evolution of the above mentioned nanostructures of various surface areas. The electrochemical pseudocapacitor performance investigation demonstrates a specific capacitance (Sc) of 367 F g−1 at 1 mA cm−2 for the NP-type morphology, which is higher than that that displayed by the other morphologies. This change in Sc value is attributed to different charge transfer resistance values, which have been obtained from electrochemical impedance spectroscopy spectra. Finally, we attempt to correlate the relationship between the surface morphology, i.e. surface area, and the charge transfer resistance with the obtained specific capacitance value of the respective electrode.",

author = "Gaikar, {P. S.} and Navale, {S. T.} and Gaikwad, {S. L.} and Ahmed Al-Osta and Jadhav, {V. V.} and Arjunwadkar, {P. R.} and Mu Naushad and Mane, {Rajaram S.}",

note = "Publisher Copyright: {\textcopyright} The Royal Society of Chemistry.",

year = "2017",

doi = "10.1039/c6dt04581b",

language = "英语",

volume = "46",

pages = "3393--3399",

journal = "Dalton Transactions",

issn = "1477-9226",

publisher = "Royal Society of Chemistry",

number = "10",

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TY - JOUR

T1 - Pseudocapacitive performance of a solution-processed β-Co(OH)2 electrode monitored through its surface morphology and area

AU - Gaikar, P. S.

AU - Navale, S. T.

AU - Gaikwad, S. L.

AU - Al-Osta, Ahmed

AU - Jadhav, V. V.

AU - Arjunwadkar, P. R.

AU - Naushad, Mu

AU - Mane, Rajaram S.

N1 - Publisher Copyright: © The Royal Society of Chemistry.

PY - 2017

Y1 - 2017

N2 - In the present study, beta-cobalt hydroxide (β-Co(OH)2) electrodes of various nanostructures and surface areas, viz. nano-rhombuses (NRs), nano-plates (NPs), and nano-grass (NGs), have been synthesized directly onto a stainless-steel (SS) substrate using a simple, economical and binder-free chemical solution-process, utilizing three cobalt precursor salts, i.e. cobalt acetate, cobalt chloride, and cobalt nitrate, respectively. Structural elucidation proves the crystallite size, type and phase-purity of β-Co(OH)2, whereas the surface morphology analysis supports the evolution of the above mentioned nanostructures of various surface areas. The electrochemical pseudocapacitor performance investigation demonstrates a specific capacitance (Sc) of 367 F g−1 at 1 mA cm−2 for the NP-type morphology, which is higher than that that displayed by the other morphologies. This change in Sc value is attributed to different charge transfer resistance values, which have been obtained from electrochemical impedance spectroscopy spectra. Finally, we attempt to correlate the relationship between the surface morphology, i.e. surface area, and the charge transfer resistance with the obtained specific capacitance value of the respective electrode.

AB - In the present study, beta-cobalt hydroxide (β-Co(OH)2) electrodes of various nanostructures and surface areas, viz. nano-rhombuses (NRs), nano-plates (NPs), and nano-grass (NGs), have been synthesized directly onto a stainless-steel (SS) substrate using a simple, economical and binder-free chemical solution-process, utilizing three cobalt precursor salts, i.e. cobalt acetate, cobalt chloride, and cobalt nitrate, respectively. Structural elucidation proves the crystallite size, type and phase-purity of β-Co(OH)2, whereas the surface morphology analysis supports the evolution of the above mentioned nanostructures of various surface areas. The electrochemical pseudocapacitor performance investigation demonstrates a specific capacitance (Sc) of 367 F g−1 at 1 mA cm−2 for the NP-type morphology, which is higher than that that displayed by the other morphologies. This change in Sc value is attributed to different charge transfer resistance values, which have been obtained from electrochemical impedance spectroscopy spectra. Finally, we attempt to correlate the relationship between the surface morphology, i.e. surface area, and the charge transfer resistance with the obtained specific capacitance value of the respective electrode.

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U2 - 10.1039/c6dt04581b

DO - 10.1039/c6dt04581b

M3 - 文章

C2 - 28239712

AN - SCOPUS:85014715679

SN - 1477-9226

VL - 46

SP - 3393

EP - 3399

JO - Dalton Transactions

JF - Dalton Transactions

IS - 10

ER -

Pseudocapacitive performance of a solution-processed β-Co(OH)₂ electrode monitored through its surface morphology and area

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