Journal
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
Volume 212, Issue 2, Pages 401-405Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/pssa.201431480
Keywords
electrodes; electrical properties; graphite; rolling processes; triboelectric nanogenerators
Funding
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Science, ICT and Future Planning [2013-068407]
- National Research Foundation of Korea [22A20130012188, 2013R1A2A2A01068407] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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We fabricated and characterized the polydimethylsiloxane (PDMS)-based triboelectric nanogenerators (TENGs) by employing a top electrode made of graphite. For a flexible electrode, the graphite was prepared on aluminum (Al) tape by a simple rolling process. By pressing a roller on the Al tape attached to a graphite substrate, the graphite flakes were entirely coated on its glue side for the graphite top electrode. For fabricating the TENG, the micro-pillar patterned PDMS as a triboelectric material was laminated on an indium tin oxide (ITO) coated polyethylene terephthalate (PET) substrate as a bottom electrode. Under the external pushing forces of 0.1-0.3kgf, the measured open-circuit voltage (V-oc) and short-circuit current (I-sc) of the TENG with the graphite top electrode were improved compared to the TENG with the ITO top electrode due to the superior electrical property. For the TENG with the graphite top electrode, the averaged V-oc and I-sc values were approximate to 1.80V and 120.4nA, respectively, at a frequency of 1Hz (cf. V-oc approximate to 0.97V and I-sc approximate to 69.3nA for the TENG with the ITO top electrode). The effect of pushing frequency on the output performance of the fabricated TENG was also investigated.
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