In recent years, everyone seems to be more enthusiastic about the development and use of foldable products. For example, the more popular wearable electronic products on the market, such as heating jackets, insoles, bracelets, etc., are all foldable. When it comes to electronic products, we can't help but talk about lithium batteries. The above-mentioned wearable electronic products are inseparable from the service of lithium batteries. What we will focus on today is a newly developed lithium battery, the "foldable lithium battery."

In the past, the lithium batteries we used in electronic products were generally harder in texture, which would make people feel uncomfortable when used. In response to this shortcoming of lithium batteries, the Hong Kong Polytechnic University's Department of Textiles and Clothing has recently developed an ultra-soft "fabric lithium battery".

It is understood that the "fabric lithium battery" developed by PolyU can be folded and bent to a diameter of about 1 mm, with an energy density of more than 450 Wh/liter, and excellent softness. It can be folded repeatedly for 1000 times without any loss of performance. The general flexible lithium battery can only be bent to a radius of about 25 mm, and the efficiency is only 200 watt-hours/liter. According to the research and development team, this "fabric lithium battery" can be used in smart watch straps, heat-generating clothing, etc., and the product is more comfortable to wear and more durable.

The research team used PolyU’s patented polymer-assisted metal deposition technology to uniformly deposit high-conductivity metal copper and nickel on treated fabrics, such as cotton and carbon cloth, to make conductive fabrics instead of ordinary lithium battery surfaces. Metal foil to act as a current collector and improve softness.

The deformation test conducted by the team proved that the fabric lithium battery has extremely high mechanical stability, durability and safety. After the battery is repeatedly folded in half, twisted at different angles, and irregularly crumpled, its voltage performance is not compromised; safety tests such as continuous hammering, shearing and steel needle puncture have also proved that the battery can provide a stable power supply for electronic components, and it does not There is a risk of fire or bursting.

According to Zheng Zijian, a professor in the Department of Textiles and Clothing at the Hong Kong Polytechnic University, it took the team three full years to complete the development of this fabric lithium battery. The principle is to use polymer-assisted metal deposition method to uniformly deposit highly conductive metals on treated fabrics, such as cotton and carbon cloth, to "make materials conductive" and replace the metal foil on the surface of ordinary lithium batteries to act as Collect fluid and improve softness.

Professor Zheng Zijian also introduced that fabric lithium batteries are smaller and thinner than traditional lithium batteries, with a thickness of less than 0.5 mm. In the past, smart products such as smart watch straps and heat-generating clothing could only be used for one day when fully charged, but if a fabric lithium battery is used, it can be up to two days after charging.

In addition to providing a stable, durable and safe energy supply for wearable electronic products, fabric lithium batteries can also be used in various fields and fields such as medical health monitoring and smart textiles. Following this trend, the daily generalization of "fabric lithium batteries" in the future may only be a matter of time.

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