Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7991212 | Journal of Alloys and Compounds | 2018 | 24 Pages |
Abstract
In this study, Na3Zr2-xNb0.8xSi2PO12, Na3Zr2-xTixSi2PO12, Na3Zr2-xYxSi2PO12-0.5x, Na3Zr2-xZnxSi2PO12-x ceramics with x = 0.1, 0.2, 0.3 and 0.4 were sintered to explore the influence of the valence state and the content of dopants on the conductivity of NASICON solid electrolyte. Archimedes method, X-ray diffraction, scanning electron microcopy and complex impedance spectroscopy were used to characterize the sintered samples. Results show that the dopant with +2 oxidation state cations improves the bulk conductivity mainly due to the less electrostatic interactions between Zn2+ ions and Na+ ions. The optimal doping content of Nb5+, Ti4+ and Y3+ doped NASICON ceramics is 0.1â¯mol and that of Zn2+ doped NASICON ceramic is 0.2â¯mol for the highest ionic conductivity. Among all the doped NASICON ceramics, Na3Zr1.8Zn0.2Si2PO11.8 ceramic displays the highest total conductivity of 1.44â¯Ãâ¯10â3â¯S/cm and bulk conductivity of 3.41â¯Ãâ¯10â3â¯S/cm at room temperature. Furthermore, doping strategy both increases the density and decreases the sintering temperature of Na3Zr2Si2PO12 ceramic.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Dan Chen, Fa Luo, Wancheng Zhou, Dongmei Zhu,