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Correlation between frictional heat and triboelectric charge: In operando temperature measurement during metal-polymer physical contact

Cited 3 time in Web of Science Cited 2 time in Scopus

Lee, Dong Woo; Kong, Dae Sol; Kim, Jong Hun; Park, Sang Hyeok; Hu, Ying Chieh; Ko, Young Joon; Jeong, Chan Bae; Lee, Seoku; Choie, Joong Il Jake; Lee, Gwan-Hyoung; Lee, Minbaek; Wie, Jeong Jae; Chang, Ki Soo; Park, Jeong Young; Jung, Jong Hoon

Issue Date
Elsevier BV
Nano Energy, Vol.103, p. 107813
In operando techniques have emerged to elucidate the fundamental mechanism of triboelectrification via relevant physical quantity measurement during the physical contact of two materials. Here, a correlation between fric-tional heat and triboelectric charge is reported in a metal-polymer triboelectric nanogenerator through the in operando temperature measurement. Fluorine-doped tin oxide (FTO) metal is slid back-and-forth under different contact pressures across polydimethylsiloxane (PDMS) polymers having different degrees of crosslinking, i.e., mixing ratio. Both the triboelectric charge and temperature variation increase and become saturated with different time-constants. Notably, the saturated triboelectric charge increases, while the saturated temperature decreases, with increasing mixing ratio. In contrast, both saturated triboelectric charge and temperature increase with increasing contact pressure. X-ray photoemission spectroscopy reveals that chemical bonds are modified inhomogeneously at the surface, and that charged materials are transferred from PDMS to FTO in accordance with the mixing ratio-and sliding time-dependent triboelectric charges. Frictional heat plays a distributive role in bond rupture and temperature variation, depending on the activation energy and frictional coefficient of PDMS. In operando temperature variation measurement provides important information on the specific bonds for tri-boelectrification and detailed charge-transfer process during physical contact.
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Related Researcher

  • College of Engineering
  • Department of Materials Science & Engineering
Research Area 2D materials, 2차원 물질, Smiconductor process, semiconductor devices, 반도체 공정, 반도체 소자


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