Non-woven electrode materials will be widely used in the wearable field

Smart bracelets, smart watches, Google glasses... More and more wearable devices are coming to us, but long-term power supply is a challenge. The reporter recently learned from Nanjing University of Technology that the school's Chen Su group created a non-woven electrode material through microfluidic spinning technology, which became one of the best choices for energy supply for wearable devices. The research results were published in Nature Communication. According to Prof. Chen Su, the team will use the micro-fluid spinning technology to pull, solidify and fuse the black phosphorus micro-nano composite fiber non-woven fabric electrode material with high conductivity, high energy density and excellent performance. The flexible supercapacitor function can be integrated into the fabric to power the wearable device. "Microfluidic spinning technology is based on the traditional wet spinning rapid prototyping, combined with the laminar flow effect of microfluidic technology, to produce micron-sized fiber technology, which has many advantages that traditional spinning technology does not have. A fiber preparation technology that does not have high-voltage current, is energy-saving, safe, and easy to operate." Wu Guan, a member of the research group, said that, more specifically, microfluidic spinning technology can control the spinning solution by utilizing the diffusion and laminar effects of microfluids. The composition and structure of the micro-fibers with adjustable structure and regular arrangement by simulating the operation function of the bio-spinner. Microfluidic spinning technology has been widely used in biology, medical, energy, national defense and other fields due to its fast mass transfer and heat transfer, precise control, easy parallel amplification, and highly controllable continuous production. At present, the global market value of smart wearable devices is about 28 billion US dollars, which is growing at a rate of 10% per year. The research results have improved the cognitive level of one-dimensional microfiber energy storage wearable materials under the microfluidic limited space, and it is expected to be widely used in wearable fields such as LEDs, smart bracelets and flexible displays.