title: A ball-bearing structured triboelectric nanogenerator for nondestructive damage and rotating speed measurement.
abstract: A ball-bearing structure based triboelectric nanogenerator (B-TENG) with interdigitative-electrodes was developed that can not only collect energy from rotational kinetic energy, but also serve as a self-powered and multifunctional sensor. The B-TENG relies on the rolling electrification between PTFE balls on Cu interdigitative-electrodes, which delivers an open-circuit voltage of ∼40 V and a short-circuit current of ∼1.2 μA at a rotating speed of 300 rpm for 4 mm PTFE balls. Using the output signals of B-TENG, a nondestructive detection for the damage of PTFE balls was realized without demounting the bearing. Besides, based on the periodic signals produced from B-TENG, the rotation speed of ball-bearing can be obtained according to the time difference between several cycles.
authors.affiliation: Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, 100083, People's Republic of China.
authors.forename: Xiao Hui
authors.initials: XH
authors.lastname: Li
authors.forename: Chang Bao
authors.initials: CB
authors.lastname: Han
authors.forename: Tao
authors.initials: T
authors.lastname: Jiang
authors.forename: Chi
authors.initials: C
authors.lastname: Zhang
authors.forename: Zhong Lin
authors.initials: ZL
authors.lastname: Wang