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

• Published in: Journal of alloys and compounds 2013-12, Vol.581, p.236-240
• Main Authors: Liu, Jianhong, Li, Yanan, Wang, Xingqin, Gao, Yun, Wu, Ningning, Wu, Borong
• Format: Article
• Language: English
• Subjects: Alloys; Capacity retention; Differential thermal analysis; Diffraction; Phase composition; Quantitative analysis; Scanning electron microscopy; Solid state reaction; SrLi2Ti6O14; Standard-less quantitative analysis; Synthesis; X-rays
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2013.07.070

•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.