Effects of Mg2+ interstitial ion on the properties of Mg0.5+x/2Si2-xAlx(PO4)3 ceramic electrolytes

Adnan, S.B.R.S. and Halim, Z.A. and Mohamed, N.S. (2017) Effects of Mg2+ interstitial ion on the properties of Mg0.5+x/2Si2-xAlx(PO4)3 ceramic electrolytes. In: 6th International Conference on Solid State Science and Technology (ICSSST 2017) and Workshop on Advanced Materials Technology: Growth and Characterization, 13-16 November 2017, Olive Tree Hotel, Penang.

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Official URL: https://doi.org/10.1016/j.jma.2017.09.005

Abstract

Nasicon type, Mg0.5+x/2Si2-xAlx(PO4)3 was synthesized using citric acid assisted sol-gel method. The X-ray diffraction was applied to investigate the effect of extra Mg2+ interstitial ion on the phase, unit cell parameters and structure of the samples. The Mg0.625Si1.75Al0.25(PO4)3 sample exhibited highest bulk conductivity value of 1.54 ×10-4 S cm-1 at ambient temperature. The frequency dependence of the σac of these ceramic electrolytes follows the universal power law variation, σac (ω) = σo + Aωα. The conductivity parameters such as hopping frequencies, charge carrier concentration and mobile ion concentration proved that the increase in conductivity with x was due to the existing of Mg2+ interstitial ion. The experiment results also revealed that the dielectric constant and dielectric loss decreased with frequency. The Mg0.625Si1.75Al0.25(PO4)3 was found to be electrochemically stable up to 2.51 V at ambient temperature.

Item Type: Conference or Workshop Item (Paper)
Additional Information: Conference paper
Uncontrolled Keywords: Ceramic; Electrolyte; Mg electrolyte; Interstitial ion; Nasicon
Subjects: Q Science > Q Science (General)
Q Science > QC Physics
Divisions: Faculty of Science
Depositing User: Mr. Mohd Safri
Date Deposited: 20 Apr 2018 02:56
Last Modified: 20 Apr 2018 02:56
URI: http://eprints.um.edu.my/id/eprint/18457

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