Timing strategy for boosting energy extraction from triboelectric nanogenerators

Flexible Film‐Discharge‐Switch Assisted Universal Power Management System for the Four Operation Modes of Triboelectric Nanogenerators

“…In the following development stage (from 2020), combining a silicon-controlled rectifier and Zener diode, the self-driven switch is developed. [26,37] Although the self-driven switch is reported with good performance on the contactseparation (CS) mode of TENG, its efficiency is highly dependent on the electrical components on the market, especially when the voltage of TENG significantly exceeds the maximum acceptable range, indicating relatively low adaptability. In the recent development stage (from 2020), introducing the air breakdown principle in PMS field, two innovative studies about self-driven discharge switches are reported on the CS mode TENG, showing high energy-transfer efficiency and wide voltage range.…”

“…In other words, the adaptability of PMS is an urgent challenge to be studied. In fact, the challenge is confirmed by existing researches, where around 70% of these reports focus on CS mode, [25,26,[28][29][30][31][32][33][37][38][39] and the other reports focus on FTL mode, [25,27,[34][35][36] namely, few studies focus on a versatile switch for all four operation modes.…”

“…Fortunately, as a bridge between TENG and electronics to reduce the mismatch and improve the energy-transfer efficiency, [24] PMS is invented. Consisting of a temporary storage capacitor (C t ), a switch, and a buck circuit, [25][26][27][28][29] PMS converts random energy from TENG into a steady DC power supply for driving electronics in high efficiency. For example, with and without a high-performance PMS in practical applications, the speed of energy storage in a capacitor can differ by two orders of magnitude.…”

Recent Progress of Switching Power Management for Triboelectric Nanogenerators

“…The abovementioned electrical characteristics cannot match the input requirements of stable DC power for conventional electronic devices. In order to reduce the voltage and impedance, and improve electrical energy supply efficiency, researchers have proposed many methods of switching power management for TENGs [40][41][42][43][44][45][46][47][48][49][50][51][52][53][54][55][56][57][58]. Figure 1 shows the progress of the power management methods from 2013 to 2021. the end of the review, we summarize the deficiencies and research challenges of switching power management and give brief prospects for the future development of TENG power management.…”

A Tubular Flexible Triboelectric Nanogenerator with a Superhydrophobic Surface for Human Motion Detecting

“…Recently, with the rapid development of a new generation of digital information technology, the implementation of various portable and wireless electronic devices has changed the way people live [ 1 , 2 , 3 , 4 ], and one consequence is that the energy supply of these electronic devices has become a critical challenge. As a new energy harvesting technology, triboelectric nanogenerators (TENGs) are based on the coupling effect of triboelectrification effect and electrostatic induction [ 5 ], which was first invented by Wang and coworkers in 2012 [ 6 ] and was widely used to convert randomly distributed, irregular, weak, and low-frequency mechanical energy into electric power [ 7 , 8 , 9 , 10 , 11 , 12 ]. The TENGs have four fundamental working modes, namely contact-separation mode, sliding mode, single-electrode mode, and free-standing mode [ 13 , 14 , 15 , 16 ].…”