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

To suppress the spatially heterogeneous plating and stripping of metallic Li in the three-dimensional (3D) porous current collectors, we thus employ commercial Cu foam with high chemical stability and mechanical strength as a host material, and then Ag particles are introduced via a plating technique in a Ag based bath. Ag particles are uniformly covered on the Cu foam, resulting in preferentially controlled Li nucleation as well as low nucleation overpotential. As a consequence, Ag particles modified Cu foam (Ag@Cu foam) exhibits excellent fast chargedischarge property and long cycle life span. In particular, Ag@Cu foam renders a high Coulombic efficiency of 97.5% for approximately 400 cycles at 2.0 mA/cm(2), while Cu foam only shows a limited cycle life of similar to 110 cycles. Therefore, Ag particles modified Cu foam may provide innovative insights to expedite the development of stable and long-life lithium metal anode.