Smart bracelets, smart watches, Google glasses … More and more wearable devices have come to us, but long-term power supply has become a challenge. The reporter recently learned from Nanjing University of Technology that Chen Su's group from the school created a non-woven electrode material through microfluid spinning technology, which has become one of the best choices for powering wearable devices.
According to Professor Chen Su, the team will use the black phosphorus composite spinning solution to pull, solidify, and fuse the black phosphorus micro / nano composite fiber non-woven electrode material through microfluid spinning technology. It has high conductivity, high energy density, and excellent performance. Flexible supercapacitor functions can be integrated into fabrics to power wearable devices.
"Microfluidic spinning technology is based on the traditional wet spinning rapid prototyping technology, combined with the laminar flow effect of microfluidic technology, to produce micron-level fibers. It has many advantages that traditional spinning technology does not have. A kind of fiber preparation technology without high voltage current, energy saving, safe and easy operation. "Teacher Wu Guan of the research group said that more specifically, the microfluidic spinning technology can use the microfluidic diffusion and laminar flow effect to control the spinning solution. Composition and structure, by simulating the function of the biospinner, micro-fibers with adjustable structure and regular arrangement are prepared. Microfluidic spinning technology has the characteristics of fast mass and heat transfer, precise control, easy parallel amplification, and highly controllable continuous production. Therefore, it is widely used in biological, medical, energy, national defense and other fields.
At present, the global market value of smart wearable devices is about 28 billion U.S. dollars, and the annual growth rate is 10%. The research results have raised the cognitive level of building a Wiener microfiber energy storage wearable material in a microfluidic confined space, and it is expected to be widely used in wearable fields such as LEDs, smart bracelets and flexible displays.