Si‐Composite Anode for Lithium‐Ion Batteries with High Initial Coulombic Efficiency

, which attracts significantinterest from the energy-storage research community; how-ever, its large volume change upon lithium insertion and ex-traction results in the pulverization of Si particles, very poorcycle performance, and low Coulombic efficiency, whichhinder the practical application of Si in lithium-ion batter-ies.