A Flexible Concentric Circle Structured Zinc‐Ion Micro‐Battery with Electrodeposited Electrodes

Abstract High‐performance all‐solid‐state rechargeable batteries with highly wearable, deformable, and waterproof features have attracted considerable attention for their promising applications in next‐generation wearable electronics. Herein, a flexible all‐solid‐state in‐plane Zn‐polyaniline (PANI) micro‐battery with concentric circle structure is reported by directly electrodepositing both positive and negative electrode materials on tyrene‐isoprene styrene rubber (SIS) substrate. As‐fabricated battery delivers a high specific area capacity of 250 µAh cm −2 , a high energy density (0.25 mW h cm −2 ) and a high power density (0.99 mW cm −2 ) as well as excellent cyclin stability (68% capacity retention after 1200 cycles). More importantly, the concentric circle structured micro‐battery exhibits superior mechanical flexibility, reasonable stretchability, outstanding waterproof ability, and temperature resistance up to 80 °C and excellent integratability with wireless charging coils.