Triboelectric nanogenerator based on graphene oxide paper utilized as the self-powered humidity sensor
Paper ID : 1136-ICNS
Faezeh Ejehi *1, Raheleh Mohammadpour2, Elham Asadian3, Pezhman Sasanpour3, Somaye Fardindoost4
1Institute for Nanoscience and Nanotechnology, Sharif University of Technology, Tehran, Iran.
2Sharif University of Technology
3Department of Medical Physics and Biomedical Engineering, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
4Department of Physics, Sharif University of Technology, Tehran 11155-9161, Iran
Triboelectric nanogenerators (TENGs) have provided novel forms of energy harvesting from induced electrostatic charges on the surfaces of two dissimilar materials with physical contact. Applying a material sensitive to adsorption of water molecules as the electrode of the TENG, offers a humidity sensor without battery. Due to their high surface area and active surface sites, graphene-based materials are appropriate candidates for such a self-powered humidity sensor. Herein, a flexible graphene oxide (GO) paper was fabricated through a straightforward method and applied as the electrode of TENGs. Outstanding current density of 5 µ and maximum power density as high as 1.3 W.m-2 were extracted in vertical contact-separation mode. The flexible TENG was employed as a self-powered humidity sensor to investigate the effect of raising humidity on the output signals, resulting in a considerable reduction in both output voltage (from 144 V to 14 V) and current (from 20 µA to 1.9 µA) in the range of relative humidity of 20% to 99%. The obtained results demonstrate a sensitive self-powered humidity sensor, applicable in portable electronic devices, as well as industrial applications.
triboelectric nanogenerator, graphene oxide paper, humidity sensor, self-powered
Status : Abstract Accepted (Oral Presentation)