Fish Bladder Film-Based Triboelectric Nanogenerator for Noncontact Position Monitoring

Developing flexible and sustainable power sources for multifunctional and self-powered sensors is crucial for electronic skin. Herein, we report a versatile, ultraflexible, high sensitivity, fish bladder film-based triboelectric nanogenerator (FBF-TENG) for smart electronic skin. A salient feature of the FBF-TENG is that a natural material acts as a triboelectric layer, which has good biocompatibility and degradability. The FBF-TENG exhibits good electrical performance for collecting biological energy, with output current density and charge density of nearly 4.56 mA/m2 and 25 μC/m2, respectively. In addition, the FBF-TENG-based electronic skin can respond linearly to acceleration and humidity with good sensitivity of about 446 nA·s2/m and 50 nA/% RH. Interestingly, the as-prepared FBF-TENG-based electronic skin also presents sensing performance of noncontact position in the range of 0–27 mm. These multifunctional advantages make it ideal for many applications, including human–machine interfacing, intelligent interfaces, and prosthetics.