Universal lithiophilic interfacial layers towards dendrite-free lithium anodes for solid-state lithium-metal batteries.

Solid-state lithium-metal batteries (SSLMBs) using garnet LiLaZrTaO (LLZTO) as the solid electrolyte are expected to conquer the safety concerns of high energy Li batteries with organic liquid electrolytes owing to its nonflammable nature and good mechanical strength. However, the poor interfacial contact between the Li anode and LLZTO greatly restrains the practical applications of the electrolyte, because large polarization, dendritic Li formation and penetration can occur at the interfaces. Here, an effective method is proposed to improve the wettability of the LLZTO toward lithium and reduce the interfacial resistance by engineering universal lithiophilic interfacial layers.

Dual Substitution and Spark Plasma Sintering to Improve Ionic Conductivity of Garnet LiLaZrO.

Garnet LiLaZrO is one of the most promising solid electrolytes used for solid-state lithium batteries. However, low ionic conductivity impedes its application. Herein, we report Ta-doping garnets with compositions of LiLaZrTaO (0.