Dual‐functional ZnO/LiF layer protected lithium metal for stable Li ₁₀ GeP ₂ S ₁₂ ‐based all‐solid‐state lithium batteries

All-solid-state lithium battery has become one of the most promising secondary batteries due to their high energy density and excellent safety. However, growth dendrites side reactions between metal solid electrolytes hinder practical application all-solid-state batteries. Herein, a dual-functional layer ZnO LiF is fabricated at interface Li10GeP2S12 electrolyte by magnetic sputtering technique. The ZnO/LiF can suppress severe Li10GeP2S12/lithium against which block dendrites. symmetric cell [email protected]/LiF-Li10GeP2S12[email protected]/LiF demonstrates stable plating/striping cycling for 2000 h with small overpotential 200 mV 0.1 mA cm−2 mAh cm−2. full protected]/LiF-Li10GeP2S12-LiCoO2@LiNbO3 shows stability 500 cycles reversible specific capacity 80 g−1 1.0 C.