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

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• 作者：Jianhong Liu ; Yanan Li ; Xingqin Wang ; Yun Gao ; Ningning Wu ; Borong Wu
• 关键词：Solid state reaction ; SrLi2Ti6O14 ; Standard-less quantitative analysis ; Capacity retention
• 刊名：Journal of Alloys and Compounds
• 出版年：2013
• 出版时间：25 December, 2013
• 年：2013
• 卷：581
• 期：Complete
• 页码：236-240
• 全文大小：2117 K

文摘

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 ¡ãC 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 ¡ãC 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.