Root‐Growth‐Inspired Self‐Morphology‐Evolution of Microsized Bismuth Surrounded by Microsized Hard Carbon for Stabilized Sodium‐Ion Storage

full cell, assembled without any pre-treatment, delivers 4500 stable cycles. This nature-inspired strategy provides a simple yet practical approach for employing the electrochemically driven evolution of micro-sized active materials and realizing high specific/volumetric capacities, fast kinetics, and long-term cycling stability.