Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 927, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2022.167019
Keywords
LATP solid electrolyte; Ceramic; Sintering aid; Ionic conductivity
Categories
Funding
- National Natural Science Foundation of China [51772229]
- 111 project [B18038]
Ask authors/readers for more resources
This study improves the sintering characteristics and performance of the NASICON-type solid electrolyte LATP by introducing TeO2 as a sintering aid, and significant progress has been made.
NASICON-type solid electrolyte Li1.3Al0.3Ti1.7(PO4)(3) (LATP) has become an excellent substitute for organic liquid electrolytes due to its high ionic conductivity and exceptional air stability. However, its application is limited by its poor sintering characteristics and high grain boundary resistance. In this study, TeO2 was introduced into LATP as a sintering aid to promote its sintering, and its properties were measured by XRD, SEM, XPS, EIS and dilatometry. The results show that the addition of TeO2 can form eutectic liquid phase in LATP ceramic pellets during sintering, thus effectively promoting particle sintering. Not only the grain size was greatly increased, but also grain boundary and pore defects were reduced. With the help of TeO2, the performance of LATP is greatly improved when sintered at only 750 degrees C, the relative density and total ionic conductivity reached 90.64% and 0.207 mS/cm, respectively. The highest total ionic conductivity of 0.279 mS/cm and the highest relative density of 93.81% were obtained when sintered at 800 ? and 950 ?, respectively. However, due to the volatilization of Li and Te at high temperature, the relative density and total ionic conductivity of LATP with TeO2 added sintered at high temperature have only a small increase compared to that without addition. In conclusion, this study provides a feasible scheme for improving LATP performance. (C) 2022 Elsevier B.V. All rights reserved.
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