Stabilization of Lithium‐Metal Anode in Rechargeable Lithium–Air Batteries

Effect of Liquid Electrolyte Soaking on the Interfacial Resistance of Li7La3Zr2O12 for All-Solid-State Lithium Batteries

“…Li metal anodes offer up to ~50% increase in terms of energy density, 5 and can be combined with state-of-the-art oxide based cathode materials, but also used in emerging battery designs as in Li-air, Li-S and Li-Br batteries. [6][7][8] However, a number of fundamental issues require a systematic effort to facilitate a commercial product. SSEs such as variants of the garnet-type ceramic oxide Li7La3Zr2O12 (LLZO), can exhibit high Li-LLZO interfacial resistances (RLi-LLZO) and poor Li wettability.…”

“…Solid-state electrolyte (SSE) systems exhibiting Li + conductivities greater than 1 mS/cm at room temperature could potentially enable the use of lithium metal anodes for high energy and high power density batteries − but only if they have sufficient chemical stability against the lithium metal and can suppress dendrite growth. Li metal anodes offer up to ∼50% increase in terms of energy density and can be combined with state-of-the-art oxide-based cathode materials, which can also be used in emerging battery designs as in Li–air, Li–S, and Li–Br batteries. − However, a number of fundamental issues require a systematic effort to facilitate a commercial product. SSEs such as variants of the garnet-type ceramic oxide Li 7 La 3 Zr 2 O 12 (LLZO) can exhibit high Li–LLZO interfacial resistances ( R Li–LLZO ) and poor Li wettability. − The main sources of this high interfacial impedance are surface contaminants such as Li 2 CO 3 and LiOH which form upon air exposure or are left over from synthesis. , Also, the microstructure of the surface and bulk of the pellet, that is, the ratio of grain boundaries to grains, affects lithium conduction .…”