Improved ionic conductivity in NASICON-type Sr2+ doped LiZr2(PO4)3

被引：62
作者：
Kumar, Sunil [1 ]
Balaya, Palani [1 ]
机构：
[1] Natl Univ Singapore, Dept Mech Engn, Singapore 117575, Singapore
来源：
SOLID STATE IONICS | 2016年 / 296卷
关键词：
Solid electrolyte; NASICON; Impedance spectroscopy; Transference number; Structure stabilization; Microstructure; NEUTRON-DIFFRACTION; ROOM-TEMPERATURE; LITHIUM; CONDUCTORS; LI+; MOBILITY; BATTERY;
D O I：
10.1016/j.ssi.2016.08.012
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Lithium ion conducting ceramics Li-1 (+) Zr-2x(2) (-) Sr-x(x)(PO4)(3) with x = 0-0.2 were synthesized via a sot-gel method using citric acid. The effects of Se2+ substitution on the structure, microstructure, and conductivity of LiZr2(PO4)(3) ceramics were studied. Rietveld refinement of powder XRD patterns showed that 5% of Sr2+ substitution for Zr4+ in LiZr2(PO4)(3) stabilizes the rhombohedral (space group R (3) over barc) phase at room temperature. Sr2+ doped LiZr2(PO4)(3) samples exhibited significantly improved ionic conductivity with Li1.2Zr1.9Sr0.1 (PO4)(3) showing highest conductivity of 0.34 x 10(-4) Omega(-1) cm(-1) at room temperature. Activation energy was found to decrease from 0.56 eV for LiZr2(PO4)(3) to 0.40 eV for Li1.4Zr1.8Sr0.2(PO4)(3). Li+ transference number determined by DC polarization for Li1.2Zr1.9Sr0.1(PO4)(3) was close to 1 confirming the ionic nature of conductivity. (C) 2016 Elsevier B.V. All rights reserved.
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页码：1 / 6
页数：6
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