Internal Friction of Li7La3Zr2O12 Based Lithium Ionic Conductors

Archives of Metallurgy and Materials

L.B. Magalas¹  Y.P. Xia²  L. Song²  J. Hu²  Y. Xia²  X.P. Wang²  Y.X. Gao²  Q.F. Fang²  L.C. Zhang² 

[1] AGH University of Science and Technology, Faculty of Metals Engineering and Industrial Computer Science, Al . Mickiewicz a 30, 30-059 Kraków, Poland;Key Laboratory of Materials Physics , Institute of Solid State Physics , Chinese Academy of Sciences, Hefei 230031, China

关键词: Keywords: Lithium ionic conductor;    Li7La3Zr2O12;    internal friction;   

DOI  :  10.1515/amm-2016-0009

学科分类：金属与冶金

来源: Akademia Gorniczo-Hutnicza im. Stanislawa Staszica / University of Mining and Metallurgy

【 摘 要 】

The diffusion mechanisms of lithium ions in tetragonal phase as well as in Al and Nb stabilized cubic Li7La3Zr2O12 compounds were investigated by low-frequency internal friction technique. In the cubic Li7La3Zr2O12 phase, a remarkable relaxation-type internal friction peak PC with a peak height up to 0.12 was observed in the temperature range from 15°C to 60°C. In the tetragonal phase however, the height of the PT peak dropped to 0.01. The obvious difference of the relaxation strength between the cubic and tetragonal phases is due to the different distribution of lithium ions in lattice, ordered in the tetragonal phase and disordered in the cubic phase. Based on the crystalline structure of the cubic garnet-type Li7La3Zr2O12 compound, it is suggested that the high internal friction peak in the cubic phase may be attributed to two diffusion processes of lithium ions: 96h↔96h and 96h↔24d.

【 授权许可】

Unknown