Robust Nanoscale Anode Protective Layers toward Fast-Charge High-Energy-Density Lithium Metal Batteries.

Mechanically stable and structurally homogeneous lithium-electrolyte interfacial layers are crucial in stabilizing lithium (Li) anodes for practical Li metal batteries. Herein, an ultrathin (≈84 nm) and robust artificial protective layer is constructed with reactive two-dimensional (2D) molecular brushes as building blocks. The artificial protective layer can in situ react with underlying Li metal to produce a nanoscale poly(lithium styrenesulfonate)-grafted graphene oxide (GO-g-PSSLi) layer on the outermost surface and an infinite Li-Ag solid solution in the anode.