Fig. 2. Electrochemical and mechanical characterization of the flexible wire battery.

(A) Capacity per unit length (mA·hour cm⁻¹) and coulombic efficiency (%) of silver-zinc wire battery cycled at 0.25C charge and 0.5C discharge rates between 1 and 1.8 V. (B) Galvanostatic charge-discharge curves for cycles 3, 30, and 90 of the battery in (A). (C) Specific capacity (mA·hour cm⁻¹) and coulombic efficiency (%) of silver-zinc wire battery cycled between 1 and 1.8 V at charge rates C, 0.5C, and 0.25C and discharge rates 2C, C, and 0.5C, respectively. (D) Galvanostatic charge-discharge curves of the battery in (C). (E) Optical images of the flexible wire battery in a relaxed and deformed state. (F) Cycling performance of the battery operated in a flat configuration and while being continuously flexed to a bending diameter (D) of 1 cm.