Journal of the Korean Physical Society | 2019
Use of Polyvinylpyrrolidone as a Chelating Agent to Reduce the Calcination Temperature of Li7La3Zr2O12 Synthesized by Using Solution-based Method
Abstract
In general, several calcination steps and long sintering times at temperatures greater than 1000 - 1200° C are typically needed in order to achieve the more cubic structure. In this study, using polyvinylpyrrolidone as a chelating agent, cubic Li7La3Zr2O12 was synthesized at a low temperature of 900° C by using a solution-based method. The resulting cubic phase contained a small amount of the pyrochlore phase, and the lithium-ion conductivity, as determined by using electrochemical impedance spectroscopy, was 1.09 × 10−6 S/cm at 25° C.