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Supercapacitors

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Supercapacitors are electrochemical capacitors with a relatively high energy density. Their energy density is typically hundreds of times greater than of conventional electrolytic capacitors. Standard supercapacitors with electrodes made from active carbon (high surface area 3000 m2/g) reach specific capacity of 300 F/g. Our long term goal is to increase this capacity by using a MnxOy layer as the electrode material. This layer is deposited by electrospraying on the aluminum foil. Such substrate is more useful for the future construction of a supercapacitor electrode.

Our study is focused on:

  • Capacitance increase (up to hundreds of Farads per gram)
  • Morphology of the prepared layer
  • Influence of electrolyte
  • Study of pseudocapacitance
  • Investigation of alternative material for electrodes

 

Electrochemical properties of the prepared layer are measured by cyclic voltammetry and discharging of the completed supercapacitor through a resistor. Electrochemical measurements are focused on:

  • Operational voltage
  • Capacitance acquisition
  • Cycle ability
  • Morphology changes

 

 

Contact

Juraj Kosek
This email address is being protected from spambots. You need JavaScript enabled to view it.
+420 220 443 296

University of Chemistry and Technology Prague
Department of Chemical Engineering
Technicka 5
166 28 Prague 6
Czech Republic

University of West Bohemia
New Technologies Research Centre (NTC)
Univerzitní 8
306 14 Pilsen
Czech Republic