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Ionic conduction and dielectric properties of yttrium doped LiZr2(PO4)3 obtained by a Pechini-type polymerizable complex route

Mariappan, Chinnasamy Ramaraj and Kumar, Parmod and Kumar, Ashok and Indris, Sylvio and Ehrenberg, Helmut and Vijaya Prakash, Gaddam and Rajan, Jose (2018) Ionic conduction and dielectric properties of yttrium doped LiZr2(PO4)3 obtained by a Pechini-type polymerizable complex route. Ceramics International, 44 (13). pp. 15509-15516. ISSN 0272-8842

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Abstract

We report on the ion transport properties of Li1+xZr2-xYx(PO4)3 (0.05 ≤ x ≤ 0.2) NASICON type nanocrystalline compounds prepared through a Pechini-type polymerizable complex method. Structural properties were characterized by means of powder X-ray diffraction, Raman spectroscopy and electron microscopy with selected area electron diffraction. Impedance spectroscopy was utilised to investigate the lithium ion transport properties. Y3+doped LiZr2(PO4)3 compounds showed stabilized rhombohedral structure with enhanced total ionic conductivity at 30 °C from 2.87 × 10−7 S cm−1 to 0.65 × 10−5 S cm−1 for x=0.05 to 0.20 respectively. The activation energies of Li1+xZr2-xYx(PO4)3 show a decreasing trend from 0.45 eV to 0.35 eV with increasing x from 0.05 to 0.20. The total conductivity of these compounds is thermally activated, with activation energies and pre-exponential factors following the Meyer-Neldel rule. The tanδ peak position shifts to the high-frequency side with increasing yttrium content. Scaling in AC conductivity spectra shows that the electrical relaxation mechanisms are independent of temperature.

Item Type: Article
Additional Information: Indexed by Scopus
Uncontrolled Keywords: Lithium ionic conductor; Impedance spectroscopy; Activation energy; AC conductivity; Dielectric properties
Subjects: Q Science > Q Science (General)
Faculty/Division: Faculty of Industrial Sciences And Technology
Depositing User: Mrs. Neng Sury Sulaiman
Date Deposited: 11 Dec 2018 02:23
Last Modified: 11 Dec 2018 02:23
URI: http://umpir.ump.edu.my/id/eprint/22618
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