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In order to meet the energy requirements of portable, miniature wireless electronic devices, it has become increasingly important to obtain energy from the environment into electrical energy. In recent years, the emergence of a highly efficient and simple structure of frictional nanogenerators (TENG) has provided an opportunity to solve the above problems. Frictional nanogenerators are energy collection and conversion devices that convert mechanical energy into electrical energy based on friction-electricity effects and have been extensively studied for the collection of energy generated in human motion, as well as environmental energy such as wind energy, water energy, and vibration energy. In addition, TENG is widely studied for self-powered sensors in tactile sensing, pressure, strain, inertia, biomedical and chemical sensing applications. With the increasing interest and research in the field of nano-generators worldwide, the research on large-scale manufacturing technology of nano-generators (TENG) is becoming increasingly urgent. This is very important for realizing the wide application of nano-generators in real life.
Recently, Associate Research Fellow Zhou Xiaofeng and PhD student Liu Chaoran of the Wireless Sensor Network Division of the Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, collaborated with Wang Lingkai, an associate professor at City University of Hong Kong, Che Lufeng, a professor at Zhejiang University, and Chen Shaoqiang, a professor at East China Normal University. With the excellent biocompatibility of silk proteins and highly transparent flexible ITO/PET materials as friction materials, TENG can be mass-produced through a simple pneumatic spray process. The maximum output voltage of the developed TENG reached 213.9 V, and its instantaneous power density reached 68.0 mW/m2. By collecting the mechanical energy of the human body's simple movement, the white LED array can be turned on after being converted into electric energy, and the nano-generator exhibits good light transmittance. This kind of nano-generator has shown great application prospects in the fields of flexible electronics, bio-compatible medical care, and transparent energy conversion. Research shows that this simple spraying process can realize high-efficiency, large-scale, high-yield and low-cost TENGs manufacturing, providing new technical ideas for the practical application and commercialization of nano-generator research.
The research was published on Nano Energy under the title Large-scale fabrication of triboelectric nanogenerator (TENG) with silk-fibroin patches via spray-coating process.
The research work was supported by the Innovation Fund of the Key Laboratory of Microsystem Technology.
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