Scalable Assembly of Flexible Ultrathin All‐in‐One Zinc‐Ion Batteries with Highly Stretchable, Editable, and Customizable Functions

Aqueous zinc-ion batteries (ZIBs) are considered to be a promising candidate for flexible energy storage devices due to their high safety and low cost. However, the scalable assembly of flexible ZIBs is still a challenge. Here, a scalable assembly strategy is developed to fabricate flexible ZIBs with an ultrathin all-in-one structure by combining blade coating with a rolling assembly process. Such a unique all-in-one integrated structure can effectively avoid the relative displacement or detachment between neighboring components to ensure continuous and effective ion- and/or loading-transfer capacity under external deformation, resulting in excellent structural and electrochemical stability. Furthermore, the ultrathin all-in-one ZIBs can be tailored and edited controllably into desired shapes and structures, further extending their editable, stretchable, and shape-customized functions. In addition, the ultrathin all-in-one ZIBs display the ability to integrate with perovskite solar cells to achieve an energy harvesting and storage integrated system. These enlighten a broad area of flexible ZIBs to be compatible with highly flexible and wearable electronics. The scaling-up assembly strategy provides a route to design other ultrathin all-in-one energy storage devices with stretchable, editable, and customizable behaviors.