Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 853, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2020.157191
Keywords
Glass-ceramics; Solid electrolytes; Bricklayer model; Microstructure; Electrical conductivity
Categories
Funding
- National Natural Science Foundation of China [51972344]
- Natural Science Foundation of Hunan Province [2018JJ3646]
- Project of Postgraduate Research Innovation of Hunan Province [CX20190189]
Ask authors/readers for more resources
Fluorine-doped Li3.6Al0.8Ti4.0P7.6O30-x/2Fx glasses prepared by the meltquenching method show that an increase in fluorine content leads to a decrease in Delta T (Tc-Tg). XRD analysis confirms the amorphous nature of the glasses, with diffraction characteristic peaks matching the LiTi2(PO4)3 crystalline phase. The glass-ceramics with 0.5 fluorine content exhibit the optimal conductivity at room temperature, reaching a maximum of 3.85 x 10(-5) S cm(-1).
The fluorine-doped Li3.6Al0.8Ti4.0P7.6O30-x/2Fx (x = 0, 0.5, 1, 2) glasses were prepared by the meltquenching method, to investigate the effect of different fluorine doping content on the electrochemical performance after crystallization. The FT-IR spectroscopy was used to investigate the characteristics of glass-forming structural units. DSC results show that Delta T (Tc-Tg) decreases from 83 degrees C to 58 degrees C with the increase of fluorine content, indicating an increase in the crystallization trend. XRD analysis confirmed the amorphous nature of the obtained glasses. Diffraction characteristic peaks of all annealed glass-ceramics match well with the crystalline phase LiTi2(PO4)(3) with rhombohedral NASICON-type structure. The Li3.6Al0.8Ti4.0P7.6O29.75F0.5 glass-ceramics obtained at 900 degrees C acquire the optimal conductivity at room temperature, which reaches a maximum value of 3.85 x 10(-5) S cm(-1). It is mainly attributed to that fluoride as a fluxing agent, is beneficial to the precipitation of the conductive crystalline phase, thereby promoting the precipitation of the conductive crystalline phases. (c) 2020 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available