Triboelectric nanogenerators based on degradable TiN/chitosan films for monitoring human movement

Natural materials are widely used in the preparation of Triboelectric nanogenerators (TENGs) because of their degradability, low cost and ease of preparation. Chitosan is one of the important ones. However, the lower dielectric constant of chitosan films affects their output performance. In this study, TiN particles were used to increase the dielectric constant of the films and the effect of different concentrations of TiN on the output performance was investigated. It was proved that at 8 wt %. concentration, the open-circuit voltage, short-circuit current were 67 V, 4.2 μA, and the power was 103.9 μW. In the actual test, it successfully powered the calculator and lit up eight blue LEDs. Finally, the TENG was successfully used to monitor human movement, and this study provides a viable path for TENGs based on degradable materials.