Influence of the Electrolyte Potential Window on the Electrical Characteristics of Supercapacitors Operating Elevated Temperatures

L.S.V. Silva; G.L. Mansani; D.S. Yoshikawa; J.C.S. Casini; R.N. Faria

doi:10.4028/www.scientific.net/MSF.1012.147

Paper Titles

The Effect of Vacuum Annealing and HDDR Processing on the Electrochemical Characteristics of Activated Carbon and Graphene Oxide for the Production of Supercapacitors Electrodes
p.125

Effects of Electrolyte Substitution on the Specific Capacitance and Equivalent Series Resistance of Energy Storage Electrochemical Supercapacitors
p.131

Study of CaF₂- Doped PbTe Thin Films Grown by Molecular Beam Epitaxy
p.136

Low-Temperature Reduction of Graphene Oxide Using the HDDR Process for Electrochemical Supercapacitor Applications
p.141

Influence of the Electrolyte Potential Window on the Electrical Characteristics of Supercapacitors Operating Elevated Temperatures
p.147

The Influence of the Addition of rGO and CNT on the Electrochemical Properties of the Batteries the LaNi-Based Battery Alloys
p.153

Graphite Electrodes for Hydrogen Production by Acid Electrolysis
p.158

Impact of ZnO Concentration on the Stability of Agglomerates of TiO₂ Engineered Nanoparticles: Effects of the pH, Ionic Strength and Zeta Potential
p.167

Evaluation of the Influence of the Reaction Medium of the Microstructure of Magnesium Oxide Nanopartícles
p.173

HomeMaterials Science ForumMaterials Science Forum Vol. 1012Influence of the Electrolyte Potential Window on...

Influence of the Electrolyte Potential Window on the Electrical Characteristics of Supercapacitors Operating Elevated Temperatures

Abstract:

The equivalent series resistances (ESR) and specific capacitances (C_s) of supercapacitors carbon electrodes have been investigated using cyclic voltammetry and electrochemical impedance spectroscopy. Commercial activated carbon electrodes employing organic electrolyte have been tested using a potential window in the range of 2.7–3.8 V. Specific capacitances were calculated from cyclic voltammetry curves at room temperature employing various scan rates (30 and 100mVs^-1). Internal series resistances of the supercapacitors were measured using the galvanostatic curves at room temperature and above (25 and 50°C). The ESR increase to 9.8 Ω at 25° and 2.7V to 78.8 Ω at with operating temperature raise and also with overpotential. A compositional and morphological evaluation of these electrodes showed a very homogeneous structure. It has been shown that the specific capacitance decreased considerably with scan rate, current density, electrochemical potential window and working temperature.

You might also be interested in these eBooks

23rd Brazilian Conference on Materials Science and Engineering

View Preview

Info:

Periodical:

Materials Science Forum (Volume 1012)

Pages:

147-152

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.1012.147

Citation:

Cite this paper

Online since:

October 2020

Authors:

L.S.V. Silva*, G.L. Mansani, D.S. Yoshikawa, J.C.S. Casini, R.N. Faria

Keywords:

Energy Storage, Equivalent Series Resistance, Specific Capacitance, Supercapacitors

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

Citation:

* - Corresponding Author

References

[1] A.P.R. Fernandez, E. Galego, R.N. Faria: Materials Science Forum Vol. 899 (2017), p.260.

Google Scholar

[2] P. Azaïs, L. Duclaux, P. Florian, D. Massiot, M. Lillo Rodenas, A. Linares Solano, J. Peres, C. Jehoulet, F. Béguina: Journal of Power Sources Vol. 171 (2007), p.1046.

DOI: 10.1016/j.jpowsour.2007.07.001

Google Scholar

[3] M. Zhu, C.J. Weber, Y. Yang, M. Konuma, U. Starke, K. Kern, A. M. Bittner: Carbon Vol. 46 (2008), p.1829.

Google Scholar

[4] G.T. Correia, F.M. Silva, L.S. Vieira, J.C.S. Casini, R.N. Faria: Materials Science Forum Vol. 930 (2018), p.597.

Google Scholar

[5] C. Lei, F. Markoulidisa, Z. Ashitakab, C. Lekakoua: Electrochimica Acta Vol. 92 (2013), p.193.

Google Scholar

[6] P.L. Taberna, C. Portet, P. Simon: Applied Physics A Vol. 82 (2006), p.639.

Google Scholar

[7] C. Pean, B. Daffos, C. Merlet, B. Rotenberg, P.L. Taberna, P. Simon, M. Salanne: J. Electrochemical Soc. Vol. 62 (2018), p. A5091.

DOI: 10.1149/2.0151505jes

Google Scholar