Nickel-Copper Alloys Modified Electrodes: an Electrochemical Study on their Interfacial and Supercapacitive Properties

Nickel-Copper Alloys Modified Electrodes: an Electrochemical Study on their Interfacial and Supercapacitive Properties

In this manuscript, we report the electrodeposition of nickel-copper alloys in a two steps methodology. Firstly, the copper electrode is oxidized to generate Cu2+ ions followed by the reduction of both Ni2+ and Cu2+. The electrodes were further cycled in KOH to convert the metallic alloy into the respective electroactive hydroxide. This methodology created an electrode with high roughness and distinct electrochemical behavior. The modified electrodes were also characterized by electrochemical impedance spectroscopy (EIS) and scanning electron microscopy (SEM). Finally, the modified electrodes were studied in their supercapacitive properties by galvanostatic charge and discharge curves; the electrodes showed a good specific capacitance of 58 mF cm-2. The results indicated a new strategy using a simple methodology to modified Cu-electrodes to develop supercapacitors at low cost.

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Main Authors: Wolfart,Franciele, Brito,Bianca R., Marchesi,Luís F., Vidotti,Marcio
Format: Digital revista
Language:English
Published: Sociedade Brasileira de Química 2017
Online Access:http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532017000901732
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spelling oai:scielo:S0103-505320170009017322017-07-28Nickel-Copper Alloys Modified Electrodes: an Electrochemical Study on their Interfacial and Supercapacitive PropertiesWolfart,FrancieleBrito,Bianca R.Marchesi,Luís F.Vidotti,Marcio nickel-copper hydroxides supercapacitors electrodeposition interfacial properties In this manuscript, we report the electrodeposition of nickel-copper alloys in a two steps methodology. Firstly, the copper electrode is oxidized to generate Cu2+ ions followed by the reduction of both Ni2+ and Cu2+. The electrodes were further cycled in KOH to convert the metallic alloy into the respective electroactive hydroxide. This methodology created an electrode with high roughness and distinct electrochemical behavior. The modified electrodes were also characterized by electrochemical impedance spectroscopy (EIS) and scanning electron microscopy (SEM). Finally, the modified electrodes were studied in their supercapacitive properties by galvanostatic charge and discharge curves; the electrodes showed a good specific capacitance of 58 mF cm-2. The results indicated a new strategy using a simple methodology to modified Cu-electrodes to develop supercapacitors at low cost.info:eu-repo/semantics/openAccessSociedade Brasileira de QuímicaJournal of the Brazilian Chemical Society v.28 n.9 20172017-09-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532017000901732en10.21577/0103-5053.20170021
institution SCIELO
collection OJS
country Brasil
countrycode BR
component Revista
access En linea
databasecode rev-scielo-br
tag revista
region America del Sur
libraryname SciELO
language English
format Digital
author Wolfart,Franciele
Brito,Bianca R.
Marchesi,Luís F.
Vidotti,Marcio
spellingShingle Wolfart,Franciele
Brito,Bianca R.
Marchesi,Luís F.
Vidotti,Marcio
Nickel-Copper Alloys Modified Electrodes: an Electrochemical Study on their Interfacial and Supercapacitive Properties
author_facet Wolfart,Franciele
Brito,Bianca R.
Marchesi,Luís F.
Vidotti,Marcio
author_sort Wolfart,Franciele
title Nickel-Copper Alloys Modified Electrodes: an Electrochemical Study on their Interfacial and Supercapacitive Properties
title_short Nickel-Copper Alloys Modified Electrodes: an Electrochemical Study on their Interfacial and Supercapacitive Properties
title_full Nickel-Copper Alloys Modified Electrodes: an Electrochemical Study on their Interfacial and Supercapacitive Properties
title_fullStr Nickel-Copper Alloys Modified Electrodes: an Electrochemical Study on their Interfacial and Supercapacitive Properties
title_full_unstemmed Nickel-Copper Alloys Modified Electrodes: an Electrochemical Study on their Interfacial and Supercapacitive Properties
title_sort nickel-copper alloys modified electrodes: an electrochemical study on their interfacial and supercapacitive properties
description In this manuscript, we report the electrodeposition of nickel-copper alloys in a two steps methodology. Firstly, the copper electrode is oxidized to generate Cu2+ ions followed by the reduction of both Ni2+ and Cu2+. The electrodes were further cycled in KOH to convert the metallic alloy into the respective electroactive hydroxide. This methodology created an electrode with high roughness and distinct electrochemical behavior. The modified electrodes were also characterized by electrochemical impedance spectroscopy (EIS) and scanning electron microscopy (SEM). Finally, the modified electrodes were studied in their supercapacitive properties by galvanostatic charge and discharge curves; the electrodes showed a good specific capacitance of 58 mF cm-2. The results indicated a new strategy using a simple methodology to modified Cu-electrodes to develop supercapacitors at low cost.
publisher Sociedade Brasileira de Química
publishDate 2017
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532017000901732
work_keys_str_mv AT wolfartfranciele nickelcopperalloysmodifiedelectrodesanelectrochemicalstudyontheirinterfacialandsupercapacitiveproperties
AT britobiancar nickelcopperalloysmodifiedelectrodesanelectrochemicalstudyontheirinterfacialandsupercapacitiveproperties
AT marchesiluisf nickelcopperalloysmodifiedelectrodesanelectrochemicalstudyontheirinterfacialandsupercapacitiveproperties
AT vidottimarcio nickelcopperalloysmodifiedelectrodesanelectrochemicalstudyontheirinterfacialandsupercapacitiveproperties
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