Calcium–Oxygen Fiber Batteries for Next-Generation Wearables

Fiber batteries that can be woven into textiles are attractive as flexible power solutions to supply future wearable electronics. A rechargeable calcium–oxygen (Ca–O2) battery which can operate at room temperature has been recently reported, revealing a new understanding on the efficient two-electron redox chemistry. The stable Ca–O2 fiber battery was finely integrated into flexible textile batteries for next-generation wearable systems.