Printed environmentally friendly supercapacitors with ionic liquid electrolytes on paper

F. Pettersson (Corresponding Author), Jari Keskinen, T. Remonen, Leo von Hertzen, Elina Jansson, Kirsi Tappura, Yanxi Zhang, C.-E. Wilén, R. Österbacka

    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
    JournalJournal of Power Sources
    Publication statusPublished - 2014
    MoE publication typeA1 Journal article-refereed


    • supercapacitors
    • deep eutectic solvents
    • activated carbons
    • printed electronics
    • environmentally friendly


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