Bioinspired Helical Triboelectric Nanogenerators for Energy Conversion of Motion

Abstract

lithium-ion batteries, such as low life, serious pollution, and low safety, have always plagued the development of intelligent wearable devices and intelligent devices. If the energy module of smart wearable devices explodes, the apparent harm is conceivable. [10][11][12] Therefore, the development of a safe and lightweight energy source is urgently necessary. Given the rapid development of the integrated circuits (IC) and low power sensors, the power requirement of smart wearable electronic devices has been reduced from mW to µW. [13][14][15] To solve this problem, it is feasible and effective to collect body movement energy and convert it into electric energy to supply power for smart wearable devices. [16,17] Presently, many kinds of equipment designed to collect body energy have been reported. [18][19][20][21] This study is divided into electromagnetic generator, friction generator, and composite generator. The friction generator provides energy for external electrical appliances under the principle of friction charge effect and electrostatic balance effect, where the relative position change of different electronegative materials will produce the change of electric potential. [22] The electromagnetic generator generates power through the induction of current by the change of magnetic field in closed coil. The composite generator is an effective combination of these two kinds of generator. The friction nanogenerator is obviously more suitable to supply power for intelligent wearable equipment because of its safety and lightweight compared with magnetoelectricity and composite generator. The main direction of this research is to improve the output performance of the proposed nanogenerator. This can be achieved by changing the characteristics of materials through mixing, microprocessing, and other methods. [23][24][25][26] Another method is to improve the collection efficiency of environmental energy by changing the structure of devices.Nature has rich scientific principles such as DNA, which is tightly and steadily aligned with base pairs containing genetic information in the form of helical twists. The combination of the corresponding base pairs can form an effective genetic expression. This allows the arrangement of more genetic information and match more genetic information accurately in a smaller space in the nucleus. It guarantees the richness and security of information. The relative friction layer and electrode Collecting energy from body movements to supply power for equipment is an important method to rapidly develop wearable intelligent equipment. This method places high requirements, such as being lightweight and stable, on a nanogenerator. Herein, a bioinspired helical triboelectric nanogenerator (BH-TENG) that realizes energy acquisition through the intensity and frequency of body movement is designed based on the helical structure of DNA. The helical structure facilitates more contact areas and provides increased stability to complete the power generation process than the simple structure with pl...

Flexible and Extendable Honeycomb‐Shaped Triboelectric Nanogenerator for Effective Human Motion Energy Harvesting and Biomechanical Sensing

“…Except the materials and the microstructure modification of the friction layer, [10][11][12][13][14] the structure design is also an effective method. Li et al [15] fabricated a helical TENG with the inspiration of DNA structure and obtained a power density (PD) of 0.44 W m −2 . A TENG with 12 pairs of fraction layers was proposed by Tian et al, [16] and the PD was 1.95 W m −2 .…”

Superhydrophobic, Humidity-Resistant, and Flexible Triboelectric Nanogenerators for Biomechanical Energy Harvesting and Wearable Self-Powered Sensing

“…The way energy is used determines the height of civilization. With the continuous exploration of energy, the deepening of research level, and the enrichment of research content, a series of new energy technologies such as wind power generation, solar power generation, and controllable nuclear fusion have been studied. − However, when people try to find reliable and safe energy sources in the outside world, they ignore that humans themselves can be used as a natural energy source. , Hence, in order to solve this problem, more and more researchers continue to pay attention to the low-frequency energy that is closely related to human life and even neglected by human beings. Triboelectric nanogenerator (TENG) technology has been successfully used to harvest and harness this weak energy. − At the same time, compared with traditional energy sources, TENGs have the advantages of efficient utilization of low-frequency energy, diversity of materials, a high safety factor, and wide energy sources. − It can not only reduce environmental pollution but also alleviate the energy crisis to a large extent. , In addition, due to the increasing demand for wearable electronic devices, TENGs have great application prospects in human–computer interaction, electronic skin, and digital medicine …”

“…1−4 However, when people try to find reliable and safe energy sources in the outside world, they ignore that humans themselves can be used as a natural energy source. 5,6 Hence, in order to solve this problem, more and more researchers continue to pay attention to the low-frequency energy that is closely related to human life and even neglected by human beings. Triboelectric nanogenerator 7 successfully used to harvest and harness this weak energy.…”

Hybridized Triboelectric‐Electromagnetic Nanogenerator for Wind Energy Harvesting to Realize Real‐Time Power Supply of Sensor Nodes

“…Regarded as one of the most important energy sources, the use of wind energy is also more suitable for energy supply at night or in a cloudy environment, [ 19 ] and even more energy can be obtained than during the day. At present, the most significant wind energy acquisition mechanisms include triboelectric, [ 20–23 ] piezoelectric, [ 24–27 ] magnetoelectric, and other forms. Since first reported by Wang et al.…”