High Performance Rotating Triboelectric Nanogenerator with Coaxial Rolling Charge Pump Strategy

Abstract

With the development of society and the advancement of technology, the emergence of the Internet of Things (IoT) has changed people’s lifestyles and raised the demand for energy to a new level. However, there are some drawbacks in terms of energy supply for IoT sensors, such as limited battery capacity and limitations in replacement and maintenance. Therefore, it has become urgent to develop a sustainable green energy source (wind energy) using the surrounding environment. Meanwhile, triboelectric nanogenerators (TENGs) with advantages such as flexible structure, low manufacturing cost, and environmental friendliness provide enormous potential for constructing self-powered sensing systems. In this work, we present a novel coaxial rolling charge pump TENG (CR-TENG) based on wind energy to enhance the output performance and durability. The rolling friction charge pump TENG directly injects positive and negative charges into the main TENG, which is more wear-resistant compared to sliding friction, and greatly increases the charge density and output power. In addition, the charge pumping part and the main TENG adopt the coaxial design, reducing the complexity of the structural design. On comparing the output performance of the CR-TENG under the initial state, rectifier bridge supplemental charge strategy, and charge pump supplemental charge strategy, results shown that the output voltage performance of the CR-TENG can be improved by 5800% under the charge pump supplemental charge strategy. Moreover, the output performance of the CR-TENG remains stable after 72,000 cycles. The output power of the CR-TENG can reach 1.21 mW with a load resistance of 3 × 107 Ω. And the CR-TENG can charge a 0.1 μF capacitor to 5 V in just 1.6 s. This work provides new insights for the rotary durable high output charge pump compensating a triboelectric nanogenerator and demonstrates the important potential of harvesting environmental energy to supply intelligent IoT nodes.

An Analytical Mechanics Model for the Rotary Sliding Triboelectric Nanogenerator

“…The moment is directly proportional to the frictional force; however, distinct TENGs are associated with varying frictional forces. From the previous study [ 19 , 20 , 21 , 22 ], it seems that when the friction force changes, the electrical output is different. However, this relationship is currently unclear, requiring further investigation.…”

“…This novel and straightforward method effectively improved the durability of the sliding freestanding TENG. Hao [ 22 ] developed an innovative coaxial rolling charge pump TENG that harnessed wind energy. The rolling friction charge pump TENG transferred positive and negative charges directly to the main TENG, offering higher durability compared to sliding friction.…”

Magnetic Material in Triboelectric Nanogenerators: A Review

“…Mechanical energy can be converted into electrical energy through the creation of an electric current by the potential difference created by the transfer of charges between the two electrode materials [68]. Therefore, through periodic friction, a significant amount of electric current can be generated, which can be applied in various fields [69], such as the Internet of Things [70][71][72], self-powered sensors [73][74][75][76], self-driving systems [33,[77][78][79], and flexible electronic devices [80][81][82][83].…”