Journal
NANOMATERIALS
Volume 12, Issue 7, Pages -Publisher
MDPI
DOI: 10.3390/nano12071158
Keywords
Ionic conductivity; LASTP; all-solid-state battery; relative density; activation energy
Categories
Funding
- National Research Foundation of Korea (NRF) - Korean government (MSIT) [NRF-2020R1A2C2009057]
- Korea Basic Science Institute (National research Facilities and Equipment Center) - Ministry of Education [2020R1A6C101A204]
- National Research Foundation of Korea [2020R1A6C101A204] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Ask authors/readers for more resources
This study optimizes the synthesis of sodium superionic conductor-type Li1.5Al0.3Si0.2Ti1.7P2.8O12 (LASTP) solid electrolyte and investigates the influence of sintering temperature on relative density and ionic conductivity. The results show that sintering at 1050 degrees C leads to high relative density and the highest ionic conductivity.
Commercial lithium-ion batteries using liquid electrolytes are still a safety hazard due to their poor chemical stability and other severe problems, such as electrolyte leakage and low thermal stability. To mitigate these critical issues, solid electrolytes are introduced. However, solid electrolytes have low ionic conductivity and inferior power density. This study reports the optimization of the synthesis of sodium superionic conductor-type Li1.5Al0.3Si0.2Ti1.7P2.8O12 (LASTP) solid electrolyte. The as-prepared powder was calcined at 650 degrees C, 700 degrees C, 750 degrees C, and 800 degrees C to optimize the synthesis conditions and yield high-quality LASTP powders. Later, LASTP was sintered at 950 degrees C, 1000 degrees C, 1050 degrees C, and 1100 degrees C to study the dependence of the relative density and ionic conductivity on the sintering temperature. Morphological changes were analyzed using field-emission scanning electron microscopy (FE-SEM), and structural changes were characterized using X-ray diffraction (XRD). Further, the ionic conductivity was measured using electrochemical impedance spectroscopy (EIS). Sintering at 1050 degrees C resulted in a high relative density and the highest ionic conductivity (9.455 x 10(-4) S cm(-1)). These findings corroborate with the activation energies that are calculated using the Arrhenius plot. Therefore, the as-synthesized superionic LASTP solid electrolytes can be used to design high-performance and safe all-solid-state batteries.
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