Highly Flexible and Transparent Polyionic-Skin Triboelectric Nanogenerator for Biomechanical Motion Harvesting

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

83 Scopus Citations
View graph of relations

Related Research Unit(s)


Original languageEnglish
Article number1803183
Journal / PublicationAdvanced Energy Materials
Issue number5
Online published13 Dec 2018
Publication statusPublished - 1 Feb 2019


The advances of flexible electronics have raised demand for power sources with adaptability, flexibility, and multifunctionalities. Triboelectric nanogenerators are promising replacements for traditional batteries. Here, a highly soft skin-like, transparent, and easily adaptable biomechanical energy harvester, based on a hybrid elastomer and with a polyionic hydrogel as the electrification layer and current collector, is developed. By harvesting the energy in human motion, the device generates an open-circuit voltage of 70 V, a short-circuit current density of 30.2 mA m−2, and a maximum power density of 2.79 W m−2 in a single-electrode working mode. Further, it is demonstrated that the device can deliver power under bending, curling or by simple tapping when attached to human skin. In addition, the optimal counterpart of the polyionic layer with highest electronegativity difference is selected from a series of contact electrification materials based on a two-electrode working mode, where a flexible device with the matching counterparts is investigated. Serving as ionic conductor and electrification layer, this polyionic material shows promising application in future development of self-powered flexible electronics.

Research Area(s)

  • biomechanical energy harvesting, current collector, flexible, polyionic, triboelectric nanogenerators