Poly U
New textile lithium battery

28.05.2019 Researchers at the Hong Kong Polytechnic University (PolyU), Hong Kong/China, have developed a highly flexible, high-energy textile lithium battery.

© Photo: PolyU
The new textile lithium battery offers more stable, durable and safe energy supply for wearable electronics with a myriad of applications, such as in healthcare monitoring, intelligent textiles, smartphones, Global Positioning System (GPS) tracking and Internet of Things (IoT).
PolyU’s novel lightweight textile lithium battery demonstrates high energy density of more than 450 Wh/L, and excellent flexibility — with a bending radius of less than 1mm, and foldability of over 1,000 cycles with marginal capacity degradation. In comparison, the existing bendable lithium battery can only reach a bending radius of about 25 mm, and with much lower performance of less than 200 Wh/L. This battery, of less than 0.5 mm thick, also possesses fast charging/discharging capability, and long cycle life comparable with conventional lithium batteries. The innovation developed by the research team of PolyU’s Institute of Textiles and Clothing (ITC) has snatched 3 prizes at the 47th International Exhibition of Inventions of Geneva in Le Grand-Saconnex/Switzerland held in April 2019, namely a Gold Medal and 2 Special Merit Awards.

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