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Ni(OH)(2) and NiO Based Composites: Battery Type Electrode Materials for Hybrid Supercapacitor Devices

Nanocomposites of Ni(OH)(2) or NiO have successfully been used in electrodes in the last five years, but they have been falsely presented as pseudocapacitive electrodes for electrochemical capacitors and hybrid devices. Indeed, these nickel oxide or hydroxide electrodes are pure battery-type electro...

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Autores principales: Brisse, Anne-Lise, Stevens, Philippe, Toussaint, Gwenaëlle, Crosnier, Olivier, Brousse, Thierry
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6073142/
https://www.ncbi.nlm.nih.gov/pubmed/29996510
http://dx.doi.org/10.3390/ma11071178
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author Brisse, Anne-Lise
Stevens, Philippe
Toussaint, Gwenaëlle
Crosnier, Olivier
Brousse, Thierry
author_facet Brisse, Anne-Lise
Stevens, Philippe
Toussaint, Gwenaëlle
Crosnier, Olivier
Brousse, Thierry
author_sort Brisse, Anne-Lise
collection PubMed
description Nanocomposites of Ni(OH)(2) or NiO have successfully been used in electrodes in the last five years, but they have been falsely presented as pseudocapacitive electrodes for electrochemical capacitors and hybrid devices. Indeed, these nickel oxide or hydroxide electrodes are pure battery-type electrodes which store charges through faradaic processes as can be shown by cyclic voltammograms or constant current galvanostatic charge/discharge plots. Despite this misunderstanding, such electrodes can be of interest as positive electrodes in hybrid supercapacitors operating under KOH electrolyte, together with an activated carbon-negative electrode. This study indicates the requirements for the implementation of Ni(OH)(2)-based electrodes in hybrid designs and the improvements that are necessary in order to increase the energy and power densities of such devices. Mass loading is the key parameter which must be above 10 mg·cm(−2) to correctly evaluate the performance of Ni(OH)(2) or NiO-based nanocomposite electrodes and provide gravimetric capacity values. With such loadings, rate capability, capacity, cycling ability, energy and power densities can be accurately evaluated. Among the 80 papers analyzed in this study, there are indications that such nanocomposite electrode can successfully improve the performance of standard Ni(OH)(2) (+)//6 M KOH//activated carbon (−) hybrid supercapacitor.
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spelling pubmed-60731422018-08-13 Ni(OH)(2) and NiO Based Composites: Battery Type Electrode Materials for Hybrid Supercapacitor Devices Brisse, Anne-Lise Stevens, Philippe Toussaint, Gwenaëlle Crosnier, Olivier Brousse, Thierry Materials (Basel) Review Nanocomposites of Ni(OH)(2) or NiO have successfully been used in electrodes in the last five years, but they have been falsely presented as pseudocapacitive electrodes for electrochemical capacitors and hybrid devices. Indeed, these nickel oxide or hydroxide electrodes are pure battery-type electrodes which store charges through faradaic processes as can be shown by cyclic voltammograms or constant current galvanostatic charge/discharge plots. Despite this misunderstanding, such electrodes can be of interest as positive electrodes in hybrid supercapacitors operating under KOH electrolyte, together with an activated carbon-negative electrode. This study indicates the requirements for the implementation of Ni(OH)(2)-based electrodes in hybrid designs and the improvements that are necessary in order to increase the energy and power densities of such devices. Mass loading is the key parameter which must be above 10 mg·cm(−2) to correctly evaluate the performance of Ni(OH)(2) or NiO-based nanocomposite electrodes and provide gravimetric capacity values. With such loadings, rate capability, capacity, cycling ability, energy and power densities can be accurately evaluated. Among the 80 papers analyzed in this study, there are indications that such nanocomposite electrode can successfully improve the performance of standard Ni(OH)(2) (+)//6 M KOH//activated carbon (−) hybrid supercapacitor. MDPI 2018-07-10 /pmc/articles/PMC6073142/ /pubmed/29996510 http://dx.doi.org/10.3390/ma11071178 Text en © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Review
Brisse, Anne-Lise
Stevens, Philippe
Toussaint, Gwenaëlle
Crosnier, Olivier
Brousse, Thierry
Ni(OH)(2) and NiO Based Composites: Battery Type Electrode Materials for Hybrid Supercapacitor Devices
title Ni(OH)(2) and NiO Based Composites: Battery Type Electrode Materials for Hybrid Supercapacitor Devices
title_full Ni(OH)(2) and NiO Based Composites: Battery Type Electrode Materials for Hybrid Supercapacitor Devices
title_fullStr Ni(OH)(2) and NiO Based Composites: Battery Type Electrode Materials for Hybrid Supercapacitor Devices
title_full_unstemmed Ni(OH)(2) and NiO Based Composites: Battery Type Electrode Materials for Hybrid Supercapacitor Devices
title_short Ni(OH)(2) and NiO Based Composites: Battery Type Electrode Materials for Hybrid Supercapacitor Devices
title_sort ni(oh)(2) and nio based composites: battery type electrode materials for hybrid supercapacitor devices
topic Review
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6073142/
https://www.ncbi.nlm.nih.gov/pubmed/29996510
http://dx.doi.org/10.3390/ma11071178
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