Printed environmentally friendly supercapacitors with ionic liquid electrolytes on paper

F. Pettersson*, J. Keskinen, T. Remonen, L. Von Hertzen, E. Jansson, K. Tappura, Y. Zhang, C. E. Wilén, R. Österbacka

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

46 Citations (Scopus)


Environmentally friendly supercapacitors are fabricated using commercial grade aluminum coated paper as a substrate and symmetrical activated carbon electrodes as large area electrodes. Different choline chloride-based eutectic solvents are used as electrolyte. These are inexpensive, environmentally friendly and have a larger operating window compared to that of water electrolytes. As the entire device is printed and the materials used are inexpensive, both small- and large-area power sources can be fabricated to be used in cheap, disposable and recyclable devices. Supercapacitors with different eutectic solvents are measured using cyclic charge-discharge and impedance spectroscopy measurements and compared to one widely used and one "green" imidazolium ionic liquid; EMIM:TFSI and EcoEng 212™, respectively. A mixture of ethylene glycol and choline chloride, Glyceline™, show the highest capacitance and power densities of the electrolytes being tested, including the imidazolium alternatives.

Original languageEnglish
Pages (from-to)298-304
Number of pages7
JournalJournal of Power Sources
Publication statusPublished - 20 Dec 2014
MoE publication typeA1 Journal article-refereed


  • Supercapacitor
  • Deep eutectic solvent
  • Printed
  • Environmentally friendly
  • Activated carbon


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