Modified electrodes based on MnO2 electrodeposited onto carbon felt: an evaluation toward supercapacitive applications

  • C. S. Santos
  • R. D. de Oliveira
  • Sudhagar Pitchaimuthu
  • L. F. MarchesiEmail author
  • C. A. PessôaEmail author
Original Paper


This work describes the electrochemical characterization toward supercapacitive properties of a modified electrode based on MnO2 electrodeposited onto carbon felt electrode (CFE/MnO2). Raman analysis confirmed the electrode modification and FEG-SEM images showed a 3D network structure with a homogeneous deposit of the MnO2 film. The morphology of the electrodeposited film showed to be dependent on the electrodeposition applied potential and time. Cyclic voltammetry and galvanostatic charge/discharge curve results showed that the charge storage process is reversible and a combination of EDLC and pseudocapacitive behavior. Under optimized conditions (1.2 V and 600 s), the modified electrode presented a specific capacitance of 541 F g−1 in an applied current density of 0.2 A g−1, which was attributed to a favored accessibility of the electrolyte on the film porous due to morphological issues. Besides, the modified electrode revealed a good capacitance retention of 80% in an applied current density of 1.0 A g−1 after 1000 cycles.


Carbon felt MnO2 Electrodeposition Supercapacitive properties 



We would like to thank Brazilian funding agencies Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES), Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq), Fundação Araucária (Brazil) for financial support. The authors are also grateful to the Institutional Laboratory C-LABMU (UEPG).

Supplementary material

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Copyright information

© Institute of Chemistry, Slovak Academy of Sciences 2019

Authors and Affiliations

  1. 1.Department of ChemistryUniversidade Estadual de Ponta GrossaParanáBrazil
  2. 2.Multi-functional Photocatalyst and Coatings Group, SPECIFIC, Materials Research Center, College of EngineeringSwansea University (Bay Campus)SwanseaUK
  3. 3.Department of Chemical EngineeringUniversidade Tecnológica Federal do ParanáParanáBrazil
  4. 4.Grupo de Pesquisas em Macromoléculas e Interfaces (GPMIn)Universidade Federal do ParanáCuritibaBrazil

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