Printed supercapacitor as hybrid device with an enzymatic power source

Jari Keskinen, Eino Sivonen, Mikael Bergelin, Jan-Erik Eriksson, Pia Sjöberg-Eerola, Matti Valkiainen, Maria Smolander, Anu Vaari, Johanna Uotila, Harry Boer, Saara Tuurala

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review


    Low cost printable power sources are needed e.g. in sensors and RFID applications. As manufacturing method printing techniques are preferred in order to keep the costs low. The materials should also be easily disposable. Enzymatic bio-fuel cells are an alternative for printable primary batteries. Since one drawback of bio-fuel cells is their low power, we have developed supercapacitors that can be combined with enzymatic bio-fuel cells to provide the power peaks necessary in the applications. The materials for the supercapacitors have been chosen to be compatible with the fuel cell and with printing methods, e.g. the activated carbon powder in the electrodes was bound with chitosan. As printing substrates we have used paperboards. The current collectors have been made of graphite and metal inks. Since the voltage requirement is limited to approximately 1 V, aqueous electrolytes have been used. Printed supercapacitors of various sizes have been prepared. The geometrical electrode areas have been between 0.5 and 2 cm2. The maximum feasible output current has been in the order of 50 mA corresponding to about 50 mW power. When the capacitor is used together with an enzymatic power source, the leakage current must be as low as possible. Typical leakage current values have been in the order of 10 µA.
    Original languageEnglish
    Title of host publicationAdvances in Science and Technology
    Subtitle of host publication5th Forum on New Materials Part A
    Publication statusPublished - 2010
    MoE publication typeA4 Article in a conference publication
    Event5th Forum on New Materials - Montecatini Terme, Italy
    Duration: 13 Jun 201018 Jun 2010

    Publication series

    SeriesAdvances in Science and Technology


    Conference5th Forum on New Materials
    CityMontecatini Terme


    • supercapacitor
    • double layer capacitor
    • printed electronics
    • enzymatic power source


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