Ferroelectric‐Polymer‐Enabled Contactless Electric Power Generation in Triboelectric Nanogenerators. (29th August 2019)

• Record Type: Journal Article
• Authors: Kim, Hyun Soo; Kim, Dong Yeong; Kim, Jae‐Eun; Kim, Jong Hun; Kong, Dae Sol; Murillo, Gonzalo; Lee, Gwan‐Hyoung; Park, Jeong Young; Jung, Jong Hoon
• Is Part Of: Advanced functional materials. Volume 29:Number 45(2019)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2019-08-29
• Subjects: capacitance -- contactless power generation -- ferroelectric polymers -- surface potential -- triboelectric nanogenerators; Materials -- Periodicals; Chemical vapor deposition -- Periodicals; 620.11
• DOI: 10.1002/adfm.201905816
• Languages: English
• ISSNs: 1616-301X

Abstract

Abstract: Triboelectric nanogenerators (TENGs) are considered as one of the most important renewable power sources for mobile electronic devices and various sensors in the Internet of Things era. However, their performance should inherently be degraded by the wearing of contact surfaces after long‐term use. Here, a ferroelectric polymer is shown to enable TENGs to generate considerable electricity without contact. Ferroelectric‐polymer‐embedded TENG (FE‐TENG) consists of indium tin oxide (ITO) electrodes, a polydimethylsiloxane (PDMS) elastomer, and a poly(vinylidene fluoride) (PVDF) polymer. In contrast to down‐ and non‐polarization, up‐polarized PVDF causes significantly large triboelectric charge, rapidly saturated voltage/current, and considerable remaining charge due to the modulated surface potential and increased capacitance. The remained triboelectric charges flow by just approaching/receding the ITO electrode to/from the PDMS without contact, which is sufficient to power light‐emitting diodes and liquid crystal displays. Additionally, the FE‐TENG can charge an Li‐battery with a significantly reduced number of contact cycles. Furthermore, an arch‐shaped FE‐TENG is demonstrated to operate a wireless temperature sensor network by scavenging the irregular and random vibrations of water waves. This work provides an innovative and simple method to increase conversion efficiency and lifetime of TENGs; which widens the applications of TENG to inaccessible areas like the ocean. Abstract : Ferroelectric‐polymer‐enabled contactless electric power generation in triboelectric nanogenerators (TENG) is demonstrated. Ferroelectric poly(vinylidene fluoride) (PVDF) polymer‐embedded TENG generates electricity by merely approaching/receding the ITO electrode to/from the PDMS without contact. A greatly reduced number of contact cycles with high conversion efficiency significantly enhances the long‐term durability of TENG, which is useful for self‐powered wireless temperature sensor applications in the inaccessible ocean.