Charge Pumping for Sliding-mode Triboelectric Nanogenerator with Voltage Stabilization and Boosted Current

摘要

As an emerging harvester for mechanical energy, the ultrahigh and unstable voltage and low surface charge density have limited the practical applications of triboelectric nanogenerators (TENGs). Herein, a charge pumping technology is demonstrated for sliding-mode TENG with voltage stabilization and enhanced current by utilizing unfixed shuttling charges to generate electricity. A voltage booster circuit and a switch circuit are incorporated to elevate charge density and reduce high output voltage, respectively. With this technology, output electricity can be doubled owing to its two conduction domains and the voltage is outputted in an approximately direct-current form. Moreover, a reduction of 63.9% in voltage fluctuation and an elevation of 43.4% in current are achieved, and an ultrahigh charge density is obtained up to 1328 mu C m(-2). This sliding charge pump technology is fundamentally different from traditional ones, providing insight into enhancing the output of TENG and offering a new high-output energy harvesting strategy.