Electrical output performance of triboelectric nanogenerator based on magnetic high entropy alloy

Abstract Although traditional soft magnetic materials have been investigated to improve triboelectric nanogenerator (TENG) performance, their electrical output performance remains insufficient. Magnetic high‐entropy alloys (HEAs), a new type of magnetic functional material, possess excellent mechanical and magnetic properties. However, the electrical characteristics of TENGs based on magnetic HEAs remain unexplored. Therefore, a TENG based on polyvinylidene fluoride/HEA‐polyamide 66 (PHP‐TENG) is proposed in this study. The coupling of displacement current from the polarization field and magnetization current generated by time‐varying electric‐field magnetization of magnetic HEAs can improve the electrical characteristics of TENGs. The maximum voltage, current, and power density of the PHP‐TENG are 156.34 V, 1.56 μA, and 188.40 mW·m −2 , respectively. PHP‐TENG maintains a stable current output even after 20,000 cycles. Furthermore, it can power a 47 μF commercial capacitor to 2.5 V in 70 s and propel a hygrometer to function normally. In addition, PHP‐TENG exhibits satisfactory sensitivity to humidity. These results indicate that TENGs based on magnetic HEAs exhibit potential for high‐efficiency energy‐collecting devices.