Nanotextured alpha Ni(II)-Co(II) hydroxides as supercapacitive active phases

A family of monophasic nanoplatelets of Ni(ii)-Co(ii) layered hydroxides, were obtained by a one-pot room temperature homogeneous alkalinization driven by the the epoxide route with glycidol. Both cations precipitate in the form of solid solutions, giving the general formula Ni1-xCox(OH)2-yCly·nH2O....

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Autor principal: Oestreicher, Victor Santiago Jesus
Publicado: 2017
Materias:
Capacitance
Positive ions
Discharge current density
Electrochemical measurements
Experimental conditions
General formulas
Homogeneous alkalinization
Layered hydroxides
Optimum performance
Specific capacitance
Nickel
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_20462069_v7_n10_p5595_Arencibia
http://hdl.handle.net/20.500.12110/paper_20462069_v7_n10_p5595_Arencibia
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling paper:paper_20462069_v7_n10_p5595_Arencibia2023-06-08T16:33:46Z Nanotextured alpha Ni(II)-Co(II) hydroxides as supercapacitive active phases Oestreicher, Victor Santiago Jesus Capacitance Positive ions Discharge current density Electrochemical measurements Experimental conditions General formulas Homogeneous alkalinization Layered hydroxides Optimum performance Specific capacitance Nickel A family of monophasic nanoplatelets of Ni(ii)-Co(ii) layered hydroxides, were obtained by a one-pot room temperature homogeneous alkalinization driven by the the epoxide route with glycidol. Both cations precipitate in the form of solid solutions, giving the general formula Ni1-xCox(OH)2-yCly·nH2O. Co(ii)-rich samples developed the simonkolleite-like alpha structure in which cations can adopt either octahedral (Oh) or tetrahedral (Td) environments, according to the formula (Ni,Co)Oh1-xCoTd2x(OH)2-2x(Cl)2x·nH2O. Ni(ii)-rich ones resulted in ill-crystallized turbostratic (Ni,Co)1-x(OH)2-x(Cl)x·nH2O. Despite the inherent differences in the crystallochemical nature of theses phases, electrochemical measurements depict a monotonous behavior in terms of their capacitance. An optimum performance was observed for samples with XNi(II) = 0.83 under most of the experimental conditions explored. This sample reaches a maximum specific capacitance of 2091 F g-1, registered at a discharge current density of 0.5 A g-1, while an energy density of 80.7 W h kg-1 was recorded at a power density of 960.4 W kg-1. © 2017 The Royal Society of Chemistry. Fil:Oestreicher, V. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2017 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_20462069_v7_n10_p5595_Arencibia http://hdl.handle.net/20.500.12110/paper_20462069_v7_n10_p5595_Arencibia
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Capacitance
Positive ions
Discharge current density
Electrochemical measurements
Experimental conditions
General formulas
Homogeneous alkalinization
Layered hydroxides
Optimum performance
Specific capacitance
Nickel
spellingShingle Capacitance
Positive ions
Discharge current density
Electrochemical measurements
Experimental conditions
General formulas
Homogeneous alkalinization
Layered hydroxides
Optimum performance
Specific capacitance
Nickel
Oestreicher, Victor Santiago Jesus
Nanotextured alpha Ni(II)-Co(II) hydroxides as supercapacitive active phases
topic_facet Capacitance
Positive ions
Discharge current density
Electrochemical measurements
Experimental conditions
General formulas
Homogeneous alkalinization
Layered hydroxides
Optimum performance
Specific capacitance
Nickel
description A family of monophasic nanoplatelets of Ni(ii)-Co(ii) layered hydroxides, were obtained by a one-pot room temperature homogeneous alkalinization driven by the the epoxide route with glycidol. Both cations precipitate in the form of solid solutions, giving the general formula Ni1-xCox(OH)2-yCly·nH2O. Co(ii)-rich samples developed the simonkolleite-like alpha structure in which cations can adopt either octahedral (Oh) or tetrahedral (Td) environments, according to the formula (Ni,Co)Oh1-xCoTd2x(OH)2-2x(Cl)2x·nH2O. Ni(ii)-rich ones resulted in ill-crystallized turbostratic (Ni,Co)1-x(OH)2-x(Cl)x·nH2O. Despite the inherent differences in the crystallochemical nature of theses phases, electrochemical measurements depict a monotonous behavior in terms of their capacitance. An optimum performance was observed for samples with XNi(II) = 0.83 under most of the experimental conditions explored. This sample reaches a maximum specific capacitance of 2091 F g-1, registered at a discharge current density of 0.5 A g-1, while an energy density of 80.7 W h kg-1 was recorded at a power density of 960.4 W kg-1. © 2017 The Royal Society of Chemistry.
author Oestreicher, Victor Santiago Jesus
author_facet Oestreicher, Victor Santiago Jesus
author_sort Oestreicher, Victor Santiago Jesus
title Nanotextured alpha Ni(II)-Co(II) hydroxides as supercapacitive active phases
title_short Nanotextured alpha Ni(II)-Co(II) hydroxides as supercapacitive active phases
title_full Nanotextured alpha Ni(II)-Co(II) hydroxides as supercapacitive active phases
title_fullStr Nanotextured alpha Ni(II)-Co(II) hydroxides as supercapacitive active phases
title_full_unstemmed Nanotextured alpha Ni(II)-Co(II) hydroxides as supercapacitive active phases
title_sort nanotextured alpha ni(ii)-co(ii) hydroxides as supercapacitive active phases
publishDate 2017
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_20462069_v7_n10_p5595_Arencibia
http://hdl.handle.net/20.500.12110/paper_20462069_v7_n10_p5595_Arencibia
work_keys_str_mv AT oestreichervictorsantiagojesus nanotexturedalphaniiicoiihydroxidesassupercapacitiveactivephases
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