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

Abstract The solid state reactions of SrLi 2 Ti 6 O 14 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 SrLi 2 Ti 6 O 14 were examined. The SrLi 2 Ti 6 O 14 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.