Title
Output density quantification of electricity generation by flowing deionized water on graphene
Author
Kei Kuriya, Kotaro Ochiai, Golap Kalita, Masaki Tanemura, Atsuki Komiya, Gota Kikugawa, Taku Ohara, Ichiro Yamashita, Fumio S. Ohuchi, M. Meyyappan, Seiji Samukawa, Katsuyoshi Washio, Takeru Okada
Year
2020
Journal
Applied Physics Letters
Abstract
Energy conversion by water flowing over graphene is a promising mode of energy harvesting. However, the mechanism, energy-conversion efficiency, and quantification of power density for this mode of interfacial electricity generation remain unknown. Quantification of the output performance for the flow-induced electricity generation using graphene is presented in this work. The output performance per unit contact area between water and graphene is found to be proportional to the flow speed, with an electromotive force density of 0.0025 [(μV/mm2)/(mm/s)] for the conditions used in this work. The ability to quantify output density will help to construct guidelines for future applications of this form of electricity generation.
This work was supported by KAKENHI Grant No. 18K04880 and the Nanotechnology Platform Japan Program. The authors thank M. Nemoto for providing technical support for the spectroscopy measurement. They also acknowledge vitally important encouragement and support made through the University of Washington—Tohoku University: Academic Open Space (UW-TU: AOS).
Full Article
Instrument
NRS-5100
Keywords
density quantification, graphene, Raman imaging