Relaxation Model of Lithium Ions in the Garnet-like Li5La3Bi2O12Lithium-lon Conductor

被引：5

作者：

Gao, Y. X. ^{[1
]}

Zhuang, Z. ^{[1
]}

Lu, H. ^{[1
]}

Wang, X. P. ^{[1
]}

Fang, Q. F. ^{[1
]}

机构：

[1] Chinese Acad Sci, Key Lab Mat Phys, Inst Solid State Phys, Hefei 230031, Peoples R China

来源：

INTERNAL FRICTION AND MECHANICAL SPECTROSCOPY | 2012年 / 184卷

关键词：

Lithium Ion Conductor; Li5La3BiO12; Internal Friction; Lithium Ion Diffusion; INTERNAL-FRICTION; DIELECTRIC LOSS;

D O I：

10.4028/www.scientific.net/SSP.184.116

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The relaxation mechanism of lithium ions in Li5La3Bi2O12 electrolyte was investigated by internal friction (IF) method. A prominent relaxation-type IF peak was observed. From the shift of peak position with frequency, the activation energy of E=1.0-1.1 eV and the pre-exponential factor of relaxation time in the order of tau(0) = 10(-25) similar to 10(-18) s were obtained if one assumes a distributed Debye relaxation process. These values of relaxation parameters strongly suggest the existence of interaction between the relaxation species (here lithium ions or vacancies). Basing on the coupling model, the values of E and tau(0) were determined as 0.5-0.6 eV and 10(-17) similar to 10(-15) s, which still deviated from the typical values for point defect relaxation. A new phenomenological model was used to describe the relaxation process, and the values of E and tau(0) were determined as 0.46 eV and 3.6 x 10(-14) s, which is in agreement with the typical values for point defect relaxation.

引用

页码：116 / +

页数：2

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