期刊
APPLIED SURFACE SCIENCE
卷 510, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apsusc.2020.145399
关键词
Solid-state electrolyte; Garnet; Sintering; Conductivity; Li-ion battery
类别
资金
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- Ford Motor Company Inc.
The garnet-type Li6.5La2.5Ba0.5TaZrO12 (LLBTZO) electrolyte for Li-ion battery was synthesized by doping tantalum (Ta) and barium (Ba) in Li7La3Zr2O12 (LLZO) via solid-state method at different sintering temperatures (1100, 1150 and 1200 degrees C). The as-prepared sintered compositions were characterized for their physical properties using X-ray diffraction (XRD) which confirmed the formation of desired cubic phase of LLBTZO. The material was further investigated by using electrochemical impedance spectroscopy (EIS), scanning electron microscopy (SEM) and He-pycnometer to study morphological and electrochemical properties. Increasing the sintering temperature from 1100 to 1200 degrees C led to more than 60-fold increase in the ionic conductivity at 26 degrees C from 1.07 x 10(-6) to 6.62 x 10(-5) S/cm, which can be attributed to evolution of microstructures. With increasing sintering temperature, more of the powder surface is eliminated, the density of the resulting pellet was increased, and thus the total conductivity was enhanced.
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