Synthesis process investigation and electrochemical performance characterization of SrLi₂Ti₆O₁₄ by ex situ XRD

The solid state reactions of SrLi2Ti6O14 was investigated using thermo-gravimetric and differential thermal analysis (TG-DTA), ex situ X-ray diffraction (XRD), and scanning electron microscopy (SEM). The phase compositions of samples obtained at temperatures of 500-1000 °C were identified by their respective XRD patterns. The relative quantities of each phase were analyzed using standardless quantitative analysis. The changes in composition during the solid-state reaction were discussed and three reactions possibly involved in the formation of SrLi₂Ti₆O ₁₄ were examined. The SrLi₂Ti₆O₁₄ obtained at 950 °C had minimal impurities, noticeable high rate performance, and achieved 90% capacity retention in a coin cell at room temperature after 1000 cycles at a 1C rate.