非晶态锂离子导体B2O3-0.7Li2O-0.7LiCl-xAl2O3-0.1V2O5的电学性质和电子自旋共振研究

对两种非晶态B₂O₃-0.7Li₂O-0.7LiCl-xAl₂O₃-0.1V₂O₅(x=0.05和0.15),用差热分析、电导率测量、X射线衍射和电子自旋共振进行研究,发现:1)V₂O₅不仅作非晶网络形成剂,而且改变了晶化过程;2)对B₂O₃-Li_{2关键词：}

INVESTIGATION ON ELECTRICAL PROPERTIES AND ESR OF AMORPHOUS Li+ CONDUCTOR B2O3-0.7Li2O-0.7LiCl-xAl2O3-0.1V2O5

Two kinds of amorphous Li⁺ conductor, B₂O₃-0.7Li₂O-0.7LiCl-xAl₂O₃-0.1V₂O₅(x= 0.05 and 0.15), were studied with differential thermal analysis, conductivity measurement, X-ray diffraction and ESR spectroscopy. We find that: (1)V₂O₅ not only is amorphous network former, but also changes the process of crystallization;(2) For both the B₂O₃-Li₂O-LiCl-Al₂O₃-V₂O₅ glasses and the P₂O₅-Li₂O-LiCl-Al₂O₃ glasses,ionic conductivity of the tablet sample is 26 times higher than that of 60 mesh powder sample of the same material; the whole piece of glass has an obviously lower activation energy and a conductivity that is two orders higher than that of the tablet sample, so it is more suitable for ion transport; (3) Adding V₂O₅ less than 3.9mol% to amorphous Li⁺ conductor B₂O₃-0.7Li₂O-0.7LiCl-xAl₂O₃(0≤x≤0.15) does not cause electron-conductivity to increase rapidly. Further more, this makes it possible to apply the technique of ESR to study the micro structure of and electron movement in the material.