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

• The SrLi2Ti6O14 materials were synthesized at different calcining temperature.
• The solid state reaction details were disclosed using standardless quantitative analysis.
• The formation of SrLi2Ti6O14 involved three possible reactions.
• The SrLi2Ti6O14 obtained at 950 °C showed noticeable electrochemical performances.

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 SrLi2Ti6O14 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.