Abstract
Triboelectric nanogenerators (TENGs) can collect energy from the surrounding environment to provide energy for small electrical equipment and sensors. Water drop triboelectric nanogenerators (WD-TENGs) are useful for harvesting clean energy from raindrops, but the commonly used structure of WD-TENGs for water drop energy harvesting has a poor induced charge quantity. Here, we analyze the electric field intensity distribution closing the triboelectric layer when a water droplets induced charges. The amount of droplet-induced charge was increased by regulating the electric field intensity distribution. Thus, an induced charge-enhanced WD-TENG structure was designed to increase the open-circuit voltage and short-circuit current of the TENG by about 4 times. This improved the output performance of the TENG. The working principle and structure of the designed WD-TENG can help optimize the performance of other TENGs.
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