The role of sintering temperature and dual metal substitutions (Al3+, Ti4+) in the development of NASICON-structured electrolyte

Rusdi, Hashlina and Rusdi, Roshidah and Aziz, Shujahadeen B. and Alsubaie, Abdullah Saad and Mahmoud, Khaled H. and Abdul Kadir, Mohd Fakhrul Zamani (2021) The role of sintering temperature and dual metal substitutions (Al3+, Ti4+) in the development of NASICON-structured electrolyte. Materials, 14 (23). ISSN 1996-1944, DOI

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The aim of this study is to synthesize Li1+xAlxTixSn2-2x(PO4) sodium super ion conductor (NASICON) -based ceramic solid electrolyte and to study the effect of dual metal substitution on the electrical and structural properties of the electrolyte. The performance of the electrolyte is analyzed based on the sintering temperature (550 to 950 degrees C) as well as the composition. The trend of XRD results reveals the presence of impurities in the sample, and from Rietveld Refinement, the purest sample is achieved at a sintering temperature of 950 degrees C and when x = 0.6. The electrolytes obey Vegard ` s Law as the addition of Al3+ and Ti4+ provide linear relation with cell volume, which signifies a random distribution. The different composition has a different optimum sintering temperature at which the highest conductivity is achieved when the sample is sintered at 650 degrees C and x = 0.4. Field emission scanning electron microscope (FESEM) analysis showed that higher sintering temperature promotes the increment of grain boundaries and size. Based on energy dispersive X-ray spectroscopy (EDX) analysis, x = 0.4 produced the closest atomic percentage ratio to the theoretical value. Electrode polarization is found to be at maximum when x = 0.4, which is determined from dielectric analysis. The electrolytes follow non-Debye behavior as it shows a variety of relaxation times.

Item Type: Article
Funders: Taif University, Taif, Saudi Arabia (TURST-2020/189)
Uncontrolled Keywords: NASICON-structured; Mechanical milling; Glass ceramic electrolyte; Impedance; Dielectric properties; Li1+xAlxTixSn2-2xP3O12
Subjects: Q Science > QC Physics
Divisions: Centre for Foundation Studies in Science > Physics Division
Faculty of Science > Department of Physics
Depositing User: Ms Zaharah Ramly
Date Deposited: 11 Aug 2022 04:47
Last Modified: 11 Aug 2022 04:47

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