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

Nicolás Arencibia; Víctor Oestreicher; Federico A. Viva; Matías Jobbágy

doi:10.1039/c6ra27839f

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

Nicolás Arencibia
, Víctor Oestreicher
, Federico A. Viva^*
, Matías Jobbágy

^*Corresponding author for this work

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

23 Citations (Scopus)

Abstract

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 Ni_1-xCo_x(OH)_2-yCl_y·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 X_Ni(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.

Original language	English
Pages (from-to)	5595-5600
Number of pages	6
Journal	RSC Advances
Volume	7
Issue number	10
DOIs	https://doi.org/10.1039/c6ra27839f
Publication status	Published - 2017
Externally published	Yes

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@article{9b59de06c64d4d9794d6c9eb9781b0f4,

title = "Nanotextured alpha Ni(II)-Co(II) hydroxides as supercapacitive active phases",

abstract = "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.",

author = "Nicol{\'a}s Arencibia and V{\'i}ctor Oestreicher and Viva, \{Federico A.\} and Mat{\'i}as Jobb{\'a}gy",

note = "Publisher Copyright: {\textcopyright} 2017 The Royal Society of Chemistry.",

year = "2017",

doi = "10.1039/c6ra27839f",

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volume = "7",

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T1 - Nanotextured alpha Ni(II)-Co(II) hydroxides as supercapacitive active phases

AU - Arencibia, Nicolás

AU - Oestreicher, Víctor

AU - Viva, Federico A.

AU - Jobbágy, Matías

PY - 2017

Y1 - 2017

N2 - 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.

AB - 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.

UR - https://www.scopus.com/pages/publications/85010387189

U2 - 10.1039/c6ra27839f

DO - 10.1039/c6ra27839f

M3 - Article

AN - SCOPUS:85010387189

SN - 2046-2069

VL - 7

SP - 5595

EP - 5600

JO - RSC Advances

JF - RSC Advances

IS - 10

ER -

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

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