Sol-Gel Method for Synthesis of Li+ -Stabilized Na-Β”- Alumina for Solid Electrolytes in Sodium-Based Batteries

Agustina, Anisa Isabella and Skadell, Karl and Kusumocahyo, Samuel P. (2019) Sol-Gel Method for Synthesis of Li+ -Stabilized Na-Β”- Alumina for Solid Electrolytes in Sodium-Based Batteries. Bachelor thesis, Swiss German University.

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Abstract

The fundamental component of sodium-based batteries is Na-β”-alumina ceramics as a solid electrolyte, due to its high sodium-ion conductivity and its role as electrical insulator. In this study, Li+ -stabilized Na-β”-alumina was synthesized by a sol-gel based on the Pechini method. The effects of different sodium content to counterbalance Na2O losses during sintering and different sintering temperatures were evaluated regarding the performance properties of Na-β”-alumina ceramic electrolyte. At first, the synthesized powders were calcined at 1200 °C, granulated, and uniaxially pressed at 100 kN into bars. Thereafter, the bars were sintered between 1500-1700 °C. The samples were systematically evaluated by density measurement, impedance spectroscopy, X-ray diffraction, and Scanning Electron Microscopy. The result shows that all prepared samples exhibits Na-β”-alumina phase with relative density up to 2.96 ± 0.01 g/cm3 , while higher sintering temperature of 1700 °C does not lead to a denser ceramic. The ionic conductivity at 300 °C was up to 0.23 S/cm. It can be stated that, optimum electrolyte performance could be achieved by adjusting the concentration of metal precursor and sintering temperature.

Item Type: Thesis (Bachelor)
Uncontrolled Keywords: Sol-Gel Process ; Pechini Method ; Li-Stabilized Na-Β”-Alumina ; Ceramics
Subjects: T Technology > TJ Mechanical engineering and machinery > TJ807 Renewable energy sources
Divisions: Faculty of Life Sciences and Technology > Department of Sustainable and Energy Environment
Depositing User: Adityatama Ratangga
Date Deposited: 18 May 2020 05:39
Last Modified: 18 May 2020 05:39
URI: http://repository.sgu.ac.id/id/eprint/420

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