Double-piezoelectric-layer-enhanced triboelectric nanogenerator for bio-mechanical energy harvesting and hot airflow monitoring

Recently, the vigorous development of flexible piezoelectric nanogenerator and triboelectric nanogenerator (TENG) has attracted more and more attention from researchers. In this paper, we reported a novel double-piezoelectric-layer-enhanced TENG (DP-TENG) to harvest mechanical energy. The DP-TENG can also serve as a self-powered deformation sensor to detect bending motion. To realize the large-scale production and wide application, a sample fabrication method was developed to prepare DP-TENG using low-cost commercial materials, such as PTFE film, Nylon film, and PVDF film. Besides, the DP-TENG can be used to monitor the flow of hot air to serve as a self-powered temperature sensor. This research has provided an effective structural design about piezoelectric-enhanced TENG for harvesting environment mechanical energy, which has bright potentials in the field of self-power deformation system and airflow temperature monitoring.