A research team led by Professor Baek Jung-min of Material Engineering, Development of High Power Friction Generator
- 공과대학
- Hit4636
- 2021-01-24
A research team led by Professor Baek Jung-min of the Department of New Materials Engineering, Development of High Power Friction Generator with Non-Contact Method
- Development of contactless friction generator by introducing C60 functionalized polyimide
- Energy &Environmental Science, an international journal published online in January 2021
Professor Baek Jung-min's research team at the Department of New Materials Engineering developed a C60-functional polyimide with UNIST's Department of Energy and Chemical Engineering Professor Yang Chang-deok and Professor Lee Joon-hee's research team to develop a high-power nanogenerator.
Friction generators, which use contact electrification to convert nearby mechanical energy into useful electrical energy when two different substances rub against each other, are used to power small electronic devices and to detect momentary stimuli in electronic skin, touchscreen, medical devices and security systems.
However, physical contact between the two surfaces has posed problems such as reduced output power due to material wear, the need for device replacement, and noise from operation. To address this problem, non-contact frictional electrical generators have recently emerged as an alternative, but there is a problem of decreasing electrical power as the distance between the two materials increases.
The researchers selected the carbon isotope C60 and introduced it as a pendant to the polyimide developed in the previous study in order to break through the above limits and give the material a high charge collection characteristic. The result showed 4.3 times higher power and 3 times higher charge maintenance efficiency compared to PFA fluoride-based nanogenerators.
Furthermore, based on its excellent characteristics, the researchers applied it to the world's first non-contact door lock and car speed sensors to show excellent performance and device stability. In the case of materials with carbon isotopes developed in this study, the possibility of actual application introduction and the level of non-contact friction elements were high.
Professor Baek Jung-min said, "This study can be applied to not only high-efficiency energy harvesting technologies in the future but also to various non-act sensor technologies to prevent the spread of viruses, so it can prevent the spread of viruses such as coronavirus infection-19.
This study was selected and supported as a follow-up to the Samsung Future Development Project in December 2017, and was published online in January 2021 in the international journal Energy &Environmental Science.
※ 논문명 : Sustainable highly charged C60-functionalized Polyimide in non-contact mode triboelectric nanogenerator
※ https://doi.org/10.1039/D0EE03057K