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Electrochemical recycling of cobalt from spent cathodes of lithium–ion batteries: its application as coating on SOFC interconnects

  • Eric M. Garcia
  • Hosane A. Tarôco
  • Tulio Matencio
  • Rosana Z. Domingues
  • Jacqueline A. F. dos Santos
  • Marcos B. J. G. de Freitas
Short Communication

Abstract

In this work the metallic cobalt was electrodeposited on 430 steel in order to obtain a low electrical resistance film made to Co3O4. Pure cobalt was obtained by acidic dissolution of lithium cobalt oxide (LiCoO2) present in exhausted Li-ion battery cathode. The electrodeposition was performed with a 96% efficiency at a potential of 1.50 V versus Ag/AgCl. The electrodeposited cobalt showed the face-centered cubic (23%) and hexagonal centered (77%) phases. After oxidation at 850 °C for 1000 h in air, the cobalt layer was transformed into the Co3O4 phase. On the other hand, a sample without cobalt showed the usual Cr2O3 and FeCr2O4 phases. After 1000 h at 850 °C, in air the area specific resistance of the sample with the cobalt oxide layer was 0.038 Ω cm−2, while it was 1.30 Ω cm−2 for the bare sample.

Keywords

Li-ion batteries Cobalt Recycling Solid oxide fuel cell Electrodeposition Interconnect 

Notes

Acknowledgments

The authors acknowledge UFMG, CNPq and CEMIG for financial support. A special acknowledgement to Michel Kleitz by revision.

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Copyright information

© Springer Science+Business Media B.V. 2011

Authors and Affiliations

  • Eric M. Garcia
    • 1
  • Hosane A. Tarôco
    • 1
  • Tulio Matencio
    • 1
  • Rosana Z. Domingues
    • 1
  • Jacqueline A. F. dos Santos
    • 1
  • Marcos B. J. G. de Freitas
    • 2
  1. 1.Chemistry DepartmentFederal University of Minas GeraisPampulhaBrazil
  2. 2.Chemistry DepartmentFederal University of Espírito SantoGoiabeirasBrazil

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