Seoul, South Korea, Aug. 19, 2022 /PRNewswire/ — With the advent of the Internet of Things (IoT) era, devices have learned to communicate and exchange data. This is achieved through sensors installed in physical objects, machines and devices that detect changes in events. However, the need for continuous power supply to these sensors is a challenge. Batteries are heavy, expensive, not environmentally friendly and need to be replaced or recharged frequently.
In a new study, researchers at Chung-Ang University have developed a powerful and powerful triboelectric nanogenerator (TENG)-based sensor that can be powered by breathing. Researchers integrated this device into a gas mask to create a self-powered hybrid sensor that detects breathing patterns and harmful chemicals.
As a result, there is a need for sustainable and renewable energy sources to replace batteries. The triboelectric nanogenerator (TENG) is one such device. Simply put, TENGs convert mechanical energy into electrical energy. Their high energy efficiency, compatibility with readily available materials, and low cost make them a promising candidate for powering sensors.
Unfortunately, current TENGs are limited by the low output current. However, increasing the output current requires larger devices, making implementation in smaller devices impossible. Is there a way to work around this trade-off?
Fortunately, a research team led by Associate Professor Sangmin Lee of Korea’s Chung-Ang University has now tackled the issue. “Our lab is interested in high-performance TENG design and self-powered TENG-based sensors. We tried to address the limitations of the current TENGs so that they can be used to realize portable power sources in practice,” explains Dr. Lee’s motivation behind the study, which was Published in Advanced Energy MaterialsThe study will appear on the homepage of the next issue.
The team developed a novel device called Inhalation-Powered Vertical Flutter Teng (IVF-TENG) that displays an extended current delivery. “Respiration acts as a continuous mechanical input and can be used to operate TENGs. Film pulsating TENGs are breath-powered devices that work by exploiting the pulsation phenomenon that results from airflow-induced vibrations. Lee.
The IVF-TENG consists of an aluminum (Al) inlet electrode, an aeroelastic dielectric layer and an Al outlet electrode. The aeroelastic panel is subject to vertical pulsation behavior due to air currents. This makes the proposed IVF-TENG different from the existing TENG.
The team studied the electrical and mechanical mechanism of the IVF-TENG, which generates a constant, high-frequency electrical voltage (17 V) and a quiescent current of 1.84 μA during inspiration and an electrostatic discharge voltage of 456 V and quiescent current. Circuit output current of 288 mA at the beginning and end of the breath cycle.
They further demonstrated that the IVF-TENG can continuously power 130 LEDs in series and 140 LEDs in parallel with each breath. Additionally, it can charge a 660F capacitor to power a Bluetooth tracker. These properties demonstrated the suitability of IVF-TENG for application in wearable electronics and wireless data transmission.
In addition, researchers integrated IVF-TENG into a gas mask and demonstrated its ability to monitor a user’s breathing patterns by observing the output response waveform. In addition, chemical warfare agents such as cyanogen chloride, sarin and dimethyl methylphosphonate have been identified as showing potential for use in emergencies. “Since gas masks are widely used in emergencies such as fire and exposure to chemical gases, we focused on the application of TENG to gas masks. We believe that IVF-TENG can be used in such scenarios as it could be used as a self-sufficient sensor,” speculates Dr. Lee. ,
In fact, their invention could help TENGs reinvent gas masks in the near future!
Original work title: Inhalation-driven, vertically pulsating, triboelectric nanogenerator with enhanced output power as a gas mask-integrated, self-powered, multifunctional system
Journal: Advanced Energy Materials
E-mail of the respective authors: [email protected], [email protected], [email protected]
About associate professor
Read more about Prof. Lee here: https://scholarworks.bwise.kr/cau/researcher-profile?ep=919
Source Chung Ang University