Effect of microstructure and surface impurity segregation on the electrical and electrochemical properties of dense Al-substituted Li7La3Zr2O12

被引：179

作者：

Cheng, Lei ^{[1
,2
]}

Park, Joong Sun ^{[1
]}

Hou, Huaming ^{[1
,3
]}

Zorba, Vassilia ^{[1
]}

Chen, Guoying ^{[1
]}

Richardson, Thomas ^{[1
]}

Cabana, Jordi ^{[1
,4
]}

Russo, Richard ^{[1
]}

Doeff, Marca ^{[1
]}

机构：

[1] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Environm Energy Technol Div, Berkeley, CA 94720 USA

[2] Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA

[3] Ocean Univ China, Opt & Optoelect Lab, Qingdao 266100, Peoples R China

[4] Univ Illinois, Dept Chem, Chicago, IL 60607 USA

来源：

JOURNAL OF MATERIALS CHEMISTRY A | 2014年 / 2卷 / 01期

关键词：

IONIC-CONDUCTIVITY; LITHIUM; BATTERY; TEMPERATURE; CONDUCTORS; ALUMINUM;

D O I：

10.1039/c3ta13999a

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Al-substituted Li7La3Zr2O12 (LLZO) pellets with a grain size of 100-200 mu m and a relative density of 94% were prepared by conventional solid-state processing at a sintering temperature of 1100 degrees C, 130 degrees C lower than previously reported. Morphological features and the presence of impurities were evaluated by X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS). Femtosecond Laser Induced Breakdown Spectroscopy (LIBS) was used to visualize the distribution of impurities. The results suggest that chemical composition of the powder cover strongly affects morphology and impurity formation, and that particle size control is critical to densification. These properties, in turn, strongly affect total ionic conductivity and interfacial resistance of the sintered pellets.

引用

页码：172 / 181

页数：10

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