In recent years, more and more wearable electronic products have entered people's field of vision, and such electronic devices are constantly developing in the direction of miniaturization, portability, and multi-functionality. Traditional energy supply systems, such as batteries, have the disadvantages of large volume, limited service life, cumbersome replacement, and easy environmental pollution. How to effectively collect mechanical energy from the environment and continuously supply power to electronic equipment is a scientist. The problem that has been solved.
The functional power generation fabric has the advantages of flexibility, woven, heat and moisture comfort, and the coupling effect of frictional electrification and electrostatic induction can effectively collect biomechanical energy during human motion and convert it into electric energy, thereby solving the problem of wearable electronic products. Energy supply and life time issues. However, due to the limitations of processing technology and material selection, the existing functional power generation fabrics have low energy conversion efficiency and energy density, and can be cut and washable poorly, which limits the improvement of application performance and the expansion of application fields.
In response to these research problems, the nanofiber research team led by Academician Yu Jianyong and Researcher Ding Bin of Donghua University selected high-strength, wear-resistant and elastic polyester fabrics as contact materials and base materials, and selected flexible conductive fabrics with excellent electrical conductivity. As the electrode layer, the surface of the polyester fabric is modified by electrospinning and electrostatic spraying composite technology, and the PVDF nanofibers and PTFE nanoparticles with beaded structure are attached on the surface to improve the surface roughness of the fabric and improve the friction of the fabric. The electronegativity, which greatly improves the electrical output performance, produces a soft and breathable new power generation fabric.
The fabric has a power density of 80 mW/m2 with an external load resistance of 50 MΩ, which can drive some electronic products to work properly. At the same time, the power-generating fabric has excellent durability, stability, cutability and water washability, and the cut power-generating fabric is re-bonded, and the current and voltage can be restored to the initial value; after being treated in different washing time, the electricity is charged. The output performance is also basically unchanged. In addition, the combination of power-generating fabrics and human body garments can also effectively monitor the amplitude and angle of human motion and serve as a highly sensitive human motion sensor.
The related results are titled "Highly flexible, breathable, tailorable and washable power generation fabrics for wearable electronics" and published in the internationally renowned journal "Nano Energy".
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