| Abstract Scope |
Among the versatile solid-sate battery electrolytes, the oxide electrolytes represented by doped Li7La3Zr2O12 (LLZO) are the most promising ones, with high ionic conductivity, good stability against Li metal, wide electrochemical window, and easy ambient environment handling, offering an excellent opportunity for SSBs with high energy density, electrochemical stability, temperature stability, and safety. However, achieving the desired Li content, crystal structure, and microstructure for LLZO-based electrolytes is difficult. Current state-of-the-art high-temperature furnace firing limits the further improvement of the electrolyte properties. Rapid laser sintering (RLS) has been utilized extensively to manufacture protonic ceramic electrochemical devices. Here, we extended the application of rapid laser sintering to process Ga-doped LLZO electrolytes to achieve the desired crystal structure, microstructure, and Li-ion conductivity by hypothesizing that RLS could avoid the evaporation of lithium while quickly densifying the electrolyte efficiently. We proved through a suite of studies that RLS can achieve high-quality Ga-LLZO electrolytes. |