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Journal of Applied Electrochemistry

, Volume 44, Issue 4, pp 455–465 | Cite as

Electrodeposition and characterization of nickel–copper metallic foams for application as electrodes for supercapacitors

  • S. Eugénio
  • T. M. Silva
  • M. J. Carmezim
  • R. G. Duarte
  • M. F. Montemor
Research Article

Abstract

Nickel–copper metallic foams were electrodeposited from an acidic electrolyte, using hydrogen bubble evolution as a dynamic template. Their morphology and chemical composition was studied by scanning electron microscopy and related to the deposition parameters (applied current density and deposition time). For high currents densities (above 1 A cm−2) the nickel–copper deposits have a three-dimensional foam-like morphology with randomly distributed nearly-circular pores whose walls present an open dendritic structure. The nickel–copper foams are crystalline and composed of pure nickel and a copper-rich phase containing nickel in solid solution. The electrochemical behaviour of the material was studied by cyclic voltammetry and chronopotentiometry (charge–discharge curves) aiming at its application as a positive electrode for supercapacitors. Cyclic voltammograms showed that the Ni–Cu foams have a pseudocapacitive behaviour. The specific capacitance was calculated from charge–discharge data and the best value (105 F g−1 at 1 mA cm−2) was obtained for nickel–copper foams deposited at 1.8 A cm−2 for 180 s. Cycling stability of these foams was also assessed and they present a 90 % capacitance retention after 10,000 cycles at 10 mA cm−2.

Keywords

Nickel–copper Nanostructured foams Electrodeposition Electrodes for supercapacitors 

Notes

Acknowledgments

The authors would like to acknowledge financial support from Fundação para a Ciência e Tecnologia (FCT) under the project PTDC/CTM-MET/119411/2010 “Electrodeposition of oxide spinel films on stainless steel substrates for the development of new electrodes for supercapacitors”, COST Action MP1004-“Hybrid Energy Storage Devices and Systems for Mobile and Stationary Applications” and COST Action MP1106-“Smart and green interfaces—from single bubbles and drops to industrial, environmental and biomedical applications”

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Copyright information

© Springer Science+Business Media Dordrecht 2013

Authors and Affiliations

  • S. Eugénio
    • 1
  • T. M. Silva
    • 1
    • 2
  • M. J. Carmezim
    • 1
    • 3
  • R. G. Duarte
    • 1
    • 4
  • M. F. Montemor
    • 1
    • 5
  1. 1.ICEMS, Instituto Superior TécnicoUniversity of LisbonLisbonPortugal
  2. 2.Department of Mechanical EngineeringInstituto Superior de Engenharia de LisboaLisbonPortugal
  3. 3.ESTSetúbalInstituto Politécnico de SetúbalSetúbalPortugal
  4. 4.ESTBarreiroInstituto Politécnico de SetúbalBarreiroPortugal
  5. 5.Department of Chemical Engineering, Instituto Superior TécnicoUniversity of LisbonLisbonPortugal

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