Silver sites guide spatially homogeneous plating of lithium metal in 3D host

We demonstrate the synthesis of Ag@Cu foam using an electrodeposition technique, which renders controlled Li nucleation and effectively avoids uncontrollable deposition. Therefore, Ag@Cu foam shows excellent cycle performance of 97.5% Coulombic efficiency for nearly 400 cycles at 2.0 mA/cm2, while Cu foam only shows a limited cycle life of ~110 cycles.267