ABSTRACT Although ultrathin lithium on copper foils addresses the issue of dendrite‐induced poor electron transport, their practical application is fundamentally limited by the excessive mass of inactive copper, which severely degrades the energy density of lithium metal batteries. To overcome this trade‐off, we developed an ultralight conductive mesh by modulating a highly conductive MXene layer on a PET mesh scaffold, followed by the controllable electroplating of an ultrathin and conformal co