Electrochemical characterization of Nickel Hydroxide electrodes with MWCNT

Alkaline secondary batteries are widely required in the current market of electronic devices. Particularly, nickel hydroxide active material is the positive electrode in Ni/H2 and Ni/MH batteries. Due to their semiconductor nature, it becomes necessary to solve this limitation. A poor electrical con...

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Detalles Bibliográficos
Autores principales: Ortiz, Mariela, Real, Silvia, Castro, Élida Beatriz
Formato: Documento de conferencia publishedVersion docunento de conferencia
Lenguaje:Inglés
Publicado: Anual Meeting of ISE 2017
Materias:
electrochemical characterization; nickel hydroxide; electrodes; MWCNT
Acceso en línea:http://hdl.handle.net/20.500.12272/2448
Aporte de:
RIA - Repositorio Institucional Abierto (UTN) de Universidad Tecnológica Nacional
id I68-R174-20.500.12272-2448
record_format dspace
institution Universidad Tecnológica Nacional
institution_str I-68
repository_str R-174
collection RIA - Repositorio Institucional Abierto (UTN)
language Inglés
topic electrochemical characterization; nickel hydroxide; electrodes; MWCNT
spellingShingle electrochemical characterization; nickel hydroxide; electrodes; MWCNT
Ortiz, Mariela
Real, Silvia
Castro, Élida Beatriz
Electrochemical characterization of Nickel Hydroxide electrodes with MWCNT
topic_facet electrochemical characterization; nickel hydroxide; electrodes; MWCNT
description Alkaline secondary batteries are widely required in the current market of electronic devices. Particularly, nickel hydroxide active material is the positive electrode in Ni/H2 and Ni/MH batteries. Due to their semiconductor nature, it becomes necessary to solve this limitation. A poor electrical contact yields ohmic overpotential and capacity loss at high currents. The carbon nanotubes (CNT) employed as additive was first studied by Lvetal.[1] who found that the addition of NTC may improve battery performance at high download speeds. However, discussions about the way that CNT affect structural and kinetic parameters are still acking. In this work, the addition of multiwall carbon nanotubes (MWCNT) is investigated. The active material was prepared by hydrothermal synthesis method. The characterization was performed by optical (SEM, TEM, XRD) and electrochemical techniques (charge‐discharge cycles, cyclic voltammetry, electrochemical impedance spectroscopy ‐ EIS). The EIS technique along with a physicochemical model developed in the laboratory, are powerful tools for the estimation of physicochemical and structural parameter such as: specific active area, effective conductivity and diffusion coefficient of H+[2]. This knowledge allows electrochemical performance optimization of the systems.
format Documento de conferencia
publishedVersion
docunento de conferencia
author Ortiz, Mariela
Real, Silvia
Castro, Élida Beatriz
author_facet Ortiz, Mariela
Real, Silvia
Castro, Élida Beatriz
author_sort Ortiz, Mariela
title Electrochemical characterization of Nickel Hydroxide electrodes with MWCNT
title_short Electrochemical characterization of Nickel Hydroxide electrodes with MWCNT
title_full Electrochemical characterization of Nickel Hydroxide electrodes with MWCNT
title_fullStr Electrochemical characterization of Nickel Hydroxide electrodes with MWCNT
title_full_unstemmed Electrochemical characterization of Nickel Hydroxide electrodes with MWCNT
title_sort electrochemical characterization of nickel hydroxide electrodes with mwcnt
publisher Anual Meeting of ISE
publishDate 2017
url http://hdl.handle.net/20.500.12272/2448
work_keys_str_mv AT ortizmariela electrochemicalcharacterizationofnickelhydroxideelectrodeswithmwcnt
AT realsilvia electrochemicalcharacterizationofnickelhydroxideelectrodeswithmwcnt
AT castroelidabeatriz electrochemicalcharacterizationofnickelhydroxideelectrodeswithmwcnt
bdutipo_str Repositorios
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