Self‐Powered Sensors: Environmentally Friendly Hydrogel‐Based Triboelectric Nanogenerators for Versatile Energy Harvesting and Self‐Powered Sensors (Adv. Energy Mater. 1/2017)

In article number 1601529, Jianhua Hao and co-workers demonstrate a novel hydrogel-based triboelectric nanogenerator (Hydrogel-TENG) with high flexibility, recyclability, and environmental friendliness. The image shows that the Hydrogel-TENG can convert versatile mechanical energy into electricity and serve as selfpowered sensors to detect human motions. Additionally, the utilized polyvinyl alcohol hydrogel is recyclable and therefore beneficial for fabricating the renewable TENG.