Grain boundary resistance of fast lithium ion conductors: Comparison between a lithium-ion conductive Li-Al-Ti-P-O-type glass ceramic and a Li1.5A10.5Ge1.5P3O12 ceramic
Grain boundary resistance of fast lithium ion conductors: Comparison between a lithium-ion conductive Li-Al-Ti-P-O-type glass ceramic and a Li1.5A10.5Ge1.5P3O12 ceramic
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DOI：
10.1016/j.elecom.2011.10.022
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发表时间：
2012-01-01
影响因子：
5.4
通讯作者：
Roling, Bernhard
中科院分区：
文献类型：
--
作者：
Mariappan, Chinnasamy R.;Gellert, Michael;Roling, Bernhard
采用X射线衍射、透射电镜和宽带阻抗谱等方法研究了锂离子导电Li-Al-Ti-P-O型玻璃陶瓷（LATP）的结构和离子导电性。将结果与Li1.5Al0.5Ge1.5P3O12（LAGP）陶瓷进行比较。虽然LATP的晶粒电导率高于LAGP，但由于大的晶界电阻，LATP的总电导率较低。LATP的晶界电阻具有比晶粒电阻略高的激活能和指前因子。我们的研究结果表明，在这些快速锂离子导体的晶界电阻的起源是明显不同于氧化物离子导体。(C)2011爱思唯尔有限公司版权所有。
The structure and ionic conductivity of a lithium-ion conductive Li-Al-Ti-P-O-type glass ceramic (LATP) was studied by means of powder X-ray diffraction, transmission electron microscopy, and broadband impedance spectroscopy. The results were compared to a Li1.5Al0.5Ge1.5P3O12 (LAGP) ceramic. While the grain conductivity of LATP is higher than that of LAGP, the total conductivity of LATP is lower due to a large grain boundary resistance. The grain boundary resistance of LATP is characterized by a slightly higher activation energy and a slightly higher pre-exponential factor than the grain resistance. Our results indicate that the origin of the grain boundary resistance in these fast lithium ion conductors is clearly distinct from oxide ion conductors. (C) 2011 Elsevier B.V. All rights reserved.