Document Type
Article
Publication Date
1-1-2017
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 existence of Mg2+ interstitial ions. 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.
Keywords
Ceramic, Electrolyte, Mg electrolyte, Interstitial ion, Nasicon
Divisions
foundation
Funders
University of Malaya and Ministry of Education: Fundamental Research Grant Scheme (project no: FP006-2013B), University of Malaya Research Grant (project no: RP013A-13AFR), and Postgraduate Research Grant (project no: PG032- 2015A)
Publication Title
Journal of Magnesium and Alloys
Volume
5
Issue
4
Publisher
National Engineering Research Center for Magnesium Alloys of China, Chongqing University