ISSN print edition: 0366-6352
ISSN electronic edition: 1336-9075
Registr. No.: MK SR 9/7

Published monthly
 

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

 

E-mail: luismarchesi@utfpr.edu.br

Received: 22 March 2019  Accepted: 3 September 2019

Abstract:

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 www.springerlink.com.

DOI: 10.1007/s11696-019-00920-9

 

Chemical Papers 74 (3) 887–894 (2020)

Sunday, November 28, 2021

IMPACT FACTOR 2020
2.097
SCImago Journal Rank 2020
0.344
SEARCH
Advanced
VOLUMES
XXVIII. International Conference on Coordination and Bioinorganic Chemistry
© 2021 Chemical Papers