Journal
CERAMICS INTERNATIONAL
Volume 45, Issue 15, Pages 18439-18444Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2019.06.061
Keywords
Li7La3Zr2O12; Garnet; Ta doping; Microstructure; Ionic conductivity
Categories
Funding
- National Natural Science Foundation of China (NSFC) [51621091]
Ask authors/readers for more resources
Li7-xLa3Zr2-xTaxO12 (0 <= x <= 1) ceramics were prepared by pressureless sintering at 1230 degrees C in air. XRD, SEM and Impedance test were used to characterize the crystal structure, microstructure and electrical performance of Li7-xLa3Zr2-xTaxO12 ceramics. According to XRD data, the specimens with x >= 0.2 sintered at 1230 degrees C for 1 h exhibit a cubic garnet structure without impurities. The Ta-doped specimens sintered at 1230 degrees C for 1 h show high relative density of 91.6%-93.9%. Ta doping has a certain effect on the Li vacancy concentration, lithium arrangement, movable Li+ concentration and microstructure of the LLZO ceramic. The Li6.6La3Zr1.6Ta0.4O12 ceramic sintered at 1230 degrees C for 1 h has the highest total conductivity of 6.01 x 10(-4) S.cm(-1) at room temperature and the lowest activation energy of 0.27 eV.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available