Thermal Influence on the Electric Parameters and Microstructures of Activated Powder Double Layer Supercapacitors

Abstract:

The effect of the working temperature on the capacity, internal equivalent serial resistance (ESR), equivalent parallel resistances (EPR) of some retail available electric double layer capacitors (EDLC) have been investigated. Standard capacities of 1.0 F at a maximum potential of 5.5 V were employed in this study. EPR values have been calculated using the self-discharge curves at temperatures above to the nominal maximum working temperature of the supercapacitors (~70°C). The ESR values were measured during charge using the constant current (1 mAF^-1) interrupt method with oscilloscope. Microstructural characterization of the electrode material have been carried out using scanning electron microscopy (SEM) and chemical microanalyses employing energy dispersive X-ray analysis (EDX).

• Periodical: Materials Science Forum (Volume 899)
• Pages: 260-265
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.899.260
• Online since: July 2017
• Authors: Antonio Paulo Rodrigues Fernandez*, Eguiberto Galego, R.N. Faria
• Keywords: Energy Storage, Scanning Electron Microscopy, Supercapacitors Self-Discharge

References

[1] P. Kurzweil, B. Frenzel, R. Gallay, Electrochemical and spectroscopy studies on rated capacitance and aging mechanisms of supercapacitors. 2nd European Symposium on Super Capacitors and Applications, Lusanne, 2-3 November, 2006, p.1.

[2] P. Kurzweil, M. Chwistek, R. Gallay, Capacitance characterization methods and aging behavior of supercapacitors. Proceedings of The 15th International Seminar on Double Layer Capacitors, Deerfield Beach, Florida, USA, December 5-7, 2005, p.1.

[3] P. Azais, L. Duclaux, P. Florian, D. Massiot, M.L. Rodenas, A.L. Solano, J.P. Peres, C. Jehoulet, F. Beguin: Journal of Power Sources Vol. 171 (2007), p.1046.

DOI: 10.1016/j.jpowsour.2007.07.001

[4] P. Kurzweil and M. Chwistek: Journal of Power Sources Vol. 176, (2008), p.555.

[5] M. Conte: Fuel Cells Vol. 10 (2010), p.806.

[6] L.H. Seim: Modeling, Control and experimental testing of a supercapacitor/battery hybrid system –passive and semi-active topologies, Master Thesis, (2011).

[7] Y. Wang: Modeling of ultracapacitor short-term and long term dynamic behavior. Master of Science Thesis, University of Akron (2008).

[8] A. M. Namisnyk, A survey of electrochemical supercapacitor technology. Project submitted for the degree of bachelor of engineering, (2003).

[9] Y. Diab, P. Venet, H. Gualous, G. Rojat: IEEE Transactions on Power Electronics Vol. 24 (2) (2009), p.510.

DOI: 10.1109/tpel.2008.2007116

[10] G. Park: Graphite: application to anode and cathode materials for energy storage device. Doctor Thesis, Saga University (2010).

[11] R.S. Rajan, M. Rahman: Journal of electrical and electronics engineering Vol. 9 (1) (2014), p.55.