According to Hong Kong media reports, the popular wearable electronic products in recent years, such as heating jackets and insoles, require the use of lithium batteries, but the lithium batteries are hard and will make users feel uncomfortable.

The Hong Kong Polytechnic University (PolyU) Department of Textiles and Clothing has developed an ultra-soft "fabric lithium battery" that can be folded and bent to a diameter of about 1 mm. Repeated folding for 1,000 times still does not damage performance. The team hopes that the "fabric lithium battery" will be applicable in the future For smart watch straps, heated clothing, etc., the product is more comfortable to wear and more durable.

Zheng Zijian, a professor at PolyU ’s Department of Textiles and Clothing, said that the team spent 3 years to complete the development of fabric lithium batteries. The principle is to use polymer-assisted metal deposition to deposit highly conductive metals on treated fabrics, such as cotton and carbon. Cloth, "conduct materials", replaces the metal foil on the surface of general lithium batteries to act as a current collector and improve softness.

Zheng Zijian said that the fabric is smaller and thinner than traditional lithium batteries, with a thickness of less than 0.5 mm. Because the fabric lithium battery can be folded and bent, it is suitable for making smart watch straps, increasing the storage capacity of smart watches and making the product more durable.

"In the past, these smart watches were fully charged for 1 day. In the future, with a strap made of lithium batteries, they will be available for up to 2 days after charging before they run out." Zheng Zijian said. (Zhong Xin)

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