Characterization of Li1.5Al0.5Ge1.5(PO4)3 Solid Electrolyte with an Added Sintering Aid

In compliance with the current trends, lithium secondary batteries are gaining attention as next-generation eco-friendly energy sources. However, the conventional liquid electrolytes are limited by their propensity to cause explosions and fires. Several studies have been conducted on solid electrolytes owing to their stability and enlargement advantages. However, the mass production of solid electrolytes through the processing of crystallized glass is challenging because of the high cost, processing difficulty, and extensive equipment requirements. The potential alternative strategy of using a molding and sintering manufacturing method is limited by performance degradation due to the presence of pores in the sintered body. To improve the performance of the Li1.5Al0.5Ge1.5(PO4)(3) solid electrolyte sintered body, Bi2O3 was applied as a sintering aid, which improved its physical and electrochemical characteristics. The addition amount of the sintering aid was varied to determine the optimal sintering conditions. A characteristic evaluation was conducted using the as-determined conditions, and reliability was ensured by evaluating long-term chemical durability. [GRAPHICS] .