Donghua University announced on the 21st that the professor Wang Hongzhi ’s research group has made new progress in the field of wearable energy, and related research results have been published on internationally renowned titles under the title "Continuous and Large-scale Preparation of Amphibious Energy Yarns and Textiles" Academic journal "Nature Communications" (Nature Communications).
The research team believes that fibers, yarns, and fabrics will become a new generation of power generation carriers. However, mature power generation technologies, such as photovoltaics, thermoelectrics, piezoelectric / triboelectrics, etc., still have challenges in combining with clothing materials and the textile industry. At present, energy textiles are difficult to produce on a large scale, the performance of energy devices is susceptible to environmental humidity, and there is still a lack of technology that uses a single yarn to generate electricity. The development of "energy clothing" still has a long way to go.
With the rapid development of wearable electronic devices, the public's demand for wearable energy is gradually increasing. Due to the limitations of traditional batteries, such as lack of flexibility, non-stretchability, and difficulty in weaving, flexible portable energy materials and devices have received a lot of attention. At present, most researches on wearable power sources have shown "wearing" forms of energy devices, which are mainly used as accessories for clothing and still lack wearing comfort. In contrast, the clothing body is a ready-made physical carrier and is a more ideal platform for wearable function integration.
In this work, the researchers used industrial-grade spinning equipment to achieve continuous and large-scale production of stretchable triboelectric yarns, and further discussed the single-electrode potential well model of metal / amorphous polymer contact / separation For the first time, the hypothesis of the potential / polarization coupling effect of friction power generation devices was proposed. With the help of a special sheath-core structure design and coupled-gain generator system, the power generation yarn reported in this work can self-generate without the aid of interaction with other objects, and can be applied to different atmospheres and even liquids.
The researchers used an industrial-grade weaving machine to weave the power generation yarn to obtain an elastic power generation fabric, which also has the ability to work amphibiously. The power generation yarn can also be woven together with other commercially available fibers such as nylon fiber and polyacrylonitrile fiber, etc. The vapor permeability, comfort and power generation of the textile can be effectively controlled. The researchers wore "energy clothes" made of power-generating fabrics and demonstrated their functions such as charging lithium batteries for electronic devices, driving wireless signal transmission systems, and capturing human body movement postures.
Dong Wei University's thesis is the first unit to complete the thesis. Gong Wei, the Ph.D. student of the School of Materials, Donghua University, is the first author, Hou Chengyi, associate researcher, Zhang Qinghong, and Wang Hongzhi are co-corresponding authors. The research work has been strongly supported by funds such as the cross-disciplinary key project of basic scientific research business expenses of the central colleges and universities, the Young Talent Support Project of the China Association for Science and Technology, and the inspirational plan of Donghua University.
According to reports, the Advanced Functional Material Group (AFMG) is affiliated to the School of Materials, Donghua University, and the mentor team includes: Professor Wang Hongzhi, Professor Li Yaogang, Researcher Zhang Qinghong, and Associate Researcher Hou Chengyi. The research group has been engaged in the research of functional materials such as intelligent discoloration / deformation, energy conversion and storage, sensing and catalysis, especially for the application of smart clothing, and has developed a series of flexible and wearable functional materials and fiber devices. Published more than 200 papers in internationally renowned academic journals such as Science Advances, Nature Sub-Nature, Nature Communications, Chemical Reviews, Chemical Society Reviews, Advanced Materials, Advanced Functional Materials, ACSNano, PNAS, Angewandte Chemie-International Edition, etc. More than 120 items. The research group has actively carried out cooperative exchanges at home and abroad. At present, it has carried out cooperative exchanges with world-class universities such as Cambridge University, Yale University, Northwestern University, University of California, Los Angeles, Danish University of Science and Technology, Nanyang Technological University, and Kyoto University PhD students. (Gong Wei Xu Jing)
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