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논문 기본 정보

자료유형
학술저널
저자정보
Jari Keskinen (Tampere University of Technology) Suvi Lehtimäki (Tampere University of Technology Finland) Arman Dastpak (Tampere University of Technology) Sampo Tuukkanen (Tampere University of Technology Finland) Timo Flyktman (VTT Technical Research Centre of Finland Ltd) Thomas Kraft (Tampere University of Technology) Anna Railanmaa (Tampere University of Technology) Donald Lupo (Tampere University of Technology Finland)
저널정보
대한금속·재료학회 Electronic Materials Letters Electronic Materials Letters Vol.12 No.6
발행연도
2016.1
수록면
795 - 803 (9page)

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We have developed material and architectural alternatives for flexiblesupercapacitors and investigated their effect on practical performance. The substrate alternatives include paperboard as well as variouspolyethylene terephthalate (PET) films and laminates, with aqueousNaCl electrolyte used in all devices. In all the supercapacitors, activatedcarbon is used as the active layer and graphite ink as the currentcollector, with various aluminium or copper structures applied toenhance the current collectors’ conductivity. The capacitance of thesupercapacitors was between 0.05 F and 0.58 F and their equivalentseries resistance (ESR) was from <1 Ω to 14 Ω, depending mainly on thecurrent collector structure. Furthermore, leakage current and selfdischargerates were defined and compared for the various architectures. The barrier properties of the supercapacitor encapsulation have a clearcorrelation with leakage current, as was clearly shown by the lowerleakage in devices with an aluminium barrier layer. A cycle life testshowed that after 40000 charge-discharge cycles the capacitancedecreases by less than 10%.

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