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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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_20462069_v7_n10_p5595_Arencibia |
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todo:paper_20462069_v7_n10_p5595_Arencibia2023-10-03T16:38:39Z Nanotextured alpha Ni(II)-Co(II) hydroxides as supercapacitive active phases Arencibia, N. Oestreicher, V. Viva, F.A. Jobbágy, M. 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. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar 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 Arencibia, N. Oestreicher, V. Viva, F.A. Jobbágy, M. 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. |
| format |
JOUR |
| author |
Arencibia, N. Oestreicher, V. Viva, F.A. Jobbágy, M. |
| author_facet |
Arencibia, N. Oestreicher, V. Viva, F.A. Jobbágy, M. |
| author_sort |
Arencibia, N. |
| 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 |
| url |
http://hdl.handle.net/20.500.12110/paper_20462069_v7_n10_p5595_Arencibia |
| work_keys_str_mv |
AT arencibian nanotexturedalphaniiicoiihydroxidesassupercapacitiveactivephases AT oestreicherv nanotexturedalphaniiicoiihydroxidesassupercapacitiveactivephases AT vivafa nanotexturedalphaniiicoiihydroxidesassupercapacitiveactivephases AT jobbagym nanotexturedalphaniiicoiihydroxidesassupercapacitiveactivephases |
| _version_ |
1782028017090953216 |