Printed environmentally friendly supercapacitors with ionic liquid electrolytes on paper

Fredrik Pettersson, J Keskinen, Tommi Remonen, von Hertzen L, E Jansson, K Tappura, Yanxi Zhang, Carl-Eric Wilen, Ronald Österbacka

    Research output: Contribution to journalArticleScientificpeer-review

    35 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 (TM), respectively. A mixture of ethylene glycol and choline chloride, Glyceline (TM), show the highest capacitance and power densities of the electrolytes being tested, including the imidazolium alternatives.
    Original languageUndefined/Unknown
    Pages (from-to)298–304
    Number of pages7
    JournalJournal of Power Sources
    Publication statusPublished - 2014
    MoE publication typeA1 Journal article-refereed


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

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