ISSN print edition: 0366-6352
ISSN electronic edition: 1336-9075
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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. Marchesi, and C. A. Pessôa

Department of Chemistry, Universidade Estadual de Ponta Grossa, Paraná, Brazil



Received: 22 March 2019  Accepted: 3 September 2019


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.

Keywords: Carbon felt; MnO2; Electrodeposition; Supercapacitive properties

Full paper is available at

DOI: 10.1007/s11696-019-00920-9


Chemical Papers 74 (3) 887–894 (2020)

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