Flexible lithium battery targets wearables: Page 3 of 3

May 29, 2019 //By Jean-Pierre Joosting
Flexible lithium battery targets wearables
PolyU's A novel lightweight Textile Lithium Battery developed by PolyU demonstrates high energy density of more than 450 Wh/L, and excellent flexibility with a bending radius of less than 1-mm, as well as foldability of over 1,000 cycles with marginal capacity degradation.

Laboratory tests conducted by the ITC team have proven the extremely high mechanical stability, durability and safety of the Textile Lithium Battery under deformation. When the battery is repeatedly folded in half, twisted at different angles or freely crumpled, its voltage window remained unchanged. Bending test showed that the battery can be bent over 1,000 times with marginal capacity degradation. Safety tests conducted by continuous hammering, trimming with scissors and penetrating with nail proved the battery can stably provide power output for the electronic components with no risk of catching fire or burst.

The findings are published in Nature Communications: Chang et al: Flexible and stable high-energy lithium-sulfur full batteries with only 100% oversized lithium. Nature Communications, 2018, 9(1): 4480.

Textile Lithium Battery video: https://youtu.be/oGRW9SKmay8

www.polyu.edu.hk


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