Hand‐Driven Gyroscopic Hybrid Nanogenerator for Recharging Portable Devices

Abstract

With the rise of portable and wearable electronics, a fast‐charging, long‐lasting power solution is needed; thus, there are attempts to harvest energy from the ambient environment. Mechanical energy harvesting through piezoelectric and triboelectric nanogenerators (PENG and TENG) is a promising approach due to their light weight, low cost, and high‐power density in comparison to other technologies. Both types of generators are capable of charging portable and smart devices on their own by converting mechanical energy into electricity. However, most previous methods have excessive input conditions, such as high rpm and input frequency, that can be only applied with other actuators. Here, a hand‐held gyroscopic generator is presented that uses the gyroscopic principle to reach a rotation rate above 8000 rpm with only hand input. The generator comprises a rotating flywheel inside a casing. Both the flywheel and casing have a TENG, and with a hybrid generator, electrical power is produced from rotation, vibration, and centrifugal force during operation. The device shows a consistent open‐circuit voltage (V OC) of 90 V and a closed‐circuit current (I CC) of 11 µA with a frequency of 200 Hz. As a stand‐alone device, this generator can power portable sensors and smartphones through hand rotation.

Self‐Powered Bio‐Inspired Spider‐Net‐Coding Interface Using Single‐Electrode Triboelectric Nanogenerator

“…[32][33][34][35][36][37][38][39][40][41] TENG technology provides an ideal approach to realize HMIs with both flexible wearable compatibility and self-powered capability, [42][43][44][45][46][47] because of its superior merits including self-generated signal, high output performance, diverse and simple device configuration, ultrawide material applicability, flexibility/stretchability, good scalability, and low cost. [32][33][34][35][36][37][38][39][40][41] TENG technology provides an ideal approach to realize HMIs with both flexible wearable compatibility and self-powered capability, [42][43][44][45][46][47] because of its superior merits including self-generated signal, high output performance, diverse and simple device configuration, ultrawide material applicability, flexibility/stretchability, good scalability, and low cost.…”

Self‐Powered Wireless Monitoring of Obstacle Position and State in Gas Pipe via Flow‐Driven Triboelectric Nanogenerators

“…Triboelectric nanogenerator (TENG), as one of clean and efficient energy technologies, possessing the advantages of simple structure, small scale, environmentally friendly and low cost, has been developed rapidly in the past decade due to the capacity of scavenging various mechanical energies in our surroundings. [6][7][8][9][10][11][12][13] Moreover, TENG-based hybridized nanogenerators also attract increasingly attention and exhibit wide applications owing to the larger output power by simultaneously scavenging mechanical, thermal, or solar energy. [14][15][16][17] As a widespread renewable energy, wind energy has the huge potential to solve the energy crisis by replacing traditional fossil fuel.…”

Facile Tailoring of Contact Layer Characteristics of the Triboelectric Nanogenerator Based on Portable Imprinting Device

“…Many organizations have encouraged studies on energy harvesting technology, which converts various forms of renewable energies into electrical energy, due to the rapid depletion of fossil fuels, such as oil, coal, and natural gas [1]. Among various energy harvesters, the triboelectric nanogenerator (TENG), which generates electricity through coupling of triboelectrification between two different materials and resultant electric al induction, is attracting close attention in harvesting numerous abandoned energies, such as biomechanical energy, wind energy, and vibration energy [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]. The advantageous characteristics of TENG, such as high shape adaptability and accessibility and easy processability, make it a promising functional biomechanical energy harvester [5][6][7]13].…”