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The utility model relates to an intelligent energy storage fiber which can be sewn, woven and washable

Time : 2020-10-19 Hits : 11

With the rapid development of wearable electronic products, people are in urgent need of energy storage devices with good flexibility, scalability, high performance, comfort and durability. Fibrous energy storage devices, which are light in weight, small in size and diverse in structure, have become the focus of people's research, and are regarded as an effective method to solve the battery life difference of wearable electronic products.

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At present, great progress has been made in the development of one-dimensional linear power sources such as lithium ion battery, lithium sulfur battery, galvanic battery and supercapacitor. Among them, AZBs has the advantages of high specific capacity (825 mA/g), rich raw materials, low cost, high safety and good flexibility, and can be used as an energy storage device for wearable electronic products. However, fibrous water-based zinc batteries lack high capacity and stable cathode materials, and the current production of fibrous batteries rarely provide the mechanical properties needed for textile processing, making it difficult to mass produce.

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Recently, researchers from the Institute of Chemical Materials of The Chinese Academy of Engineering Physics, inspired by the strong adhesion and REDOX activity of polydopamine (PDA), developed the energy storage fibers that can be stitched, woven and washable using PDA as the active material and nano-binder. The energy storage fiber also shows high flexibility and high strength, and can be directly used to prepare wearable energy storage textiles, which provides a new way for the development of wearable electronic devices. The results were published in Advanced Functioned Materials with the title "Bioinspired Interface Design of Sewable, Weavable, and Washable Fiber Zinc production for Wearable Power Textiles."

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Schematic diagram of preparation of energy storage textiles based on flexible AZBs and performance characterization of PCNF

The researchers selected carbon nanotube fibers (CNF) as the carbon substrate and placed THE CNFs in a solution of dopamine, so that dopamine formed a polydopamine (PDA) on the surface of the CNF, and the PDA-coated CNFs served as the cathode (PCNF). The prepared PCNF and zinc wire are woven into fabric through looms to make energy storage textiles. Coated with polyvinyl alcohol (PVA) gel electrolyte, the fabric can be used to power a variety of electronic devices.

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Comparison of electrolyte resistance and electrochemical performance of PCNF electrode under different heat treatment temperature

In order to remove residual dopamine and increase the proportion of quinones with oxidative activity in PCNF, the PCNF samples polymerized were heat-treated at different temperatures. The results show that PCNF electrode has good electrolyte resistance and electrochemical performance when heat treatment temperature is 300℃.

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The electrochemical performance and FT-IR and XPS characterization of PCNF electrode at the heat treatment temperature of 300℃

The researchers sewn the energy storage fibers into a specific pattern of energy storage textiles through a sewing machine, which can provide a stable power supply for a variety of electronic products under both bending and washing conditions.

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Schematic diagram and application performance of energy storage Textiles based on flexible AZBs sewing and weaving

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