Solid State Ionics, volume 291, pages 1-7

Mechanism of lithium ion diffusion in the hexad substituted Li7La3Zr2O12 solid electrolytes

Y. X. Gao 1
Xianping Wang 1
H. Lu 1
Lai-Chang Zhang 1
L. Ma 1
Q. F. FANG 1
1
 
Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, People's Republic of China
Publication typeJournal Article
Publication date2016-08-01
Quartile SCImago
Q2
Quartile WOS
Q2
Impact factor3.2
ISSN01672738
General Chemistry
Condensed Matter Physics
General Materials Science
Abstract
The Li 6.4 La 3 Zr 1.7 M 0.3 O 12 (M = Mo and Cr) and Li 7 − 2 x La 3 Zr 2 −  x W x O 12 ( x  = 0.1–0.5) solid lithium-ion conductors were prepared by conventional solid state reaction method. The results indicate that partial substitutions by W and Mo ions can stabilize the garnet-like cubic phase of Li–La–Zr–O at room temperature, while the Cr ions substitution cannot even at a content of 15 mol%. The total conductivity of the Li 7 − 2 x La 3 Zr 2 −  x W x O 12 lithium conductor is the highest at x  = 0.2 (8.7 × 10 − 5  S/cm), and decreases with the increasing W substituting concentration. The Li 6.4 La 3 Zr 1.7 Mo 0.3 O 12 has a higher total conductivity than that of Li 6.4 La 3 Zr 1.7 W 0.3 O 12 . Different from one apparent peak in the Li 7 La 3 Zr 2 O 12 samples, two prominent relaxation-type internal friction peaks related to the short range diffusion of lithium ions were observed in each W or Mo substituted Li 7 La 3 Zr 2 O 12 compounds. The high-temperature IF peaks locate at about 365.9 K and 358.9 K at 1 Hz, corresponding to an activation energy of 0.49 and 0.51 eV for the W and Mo substituted Li 7 La 3 Zr 2 O 12 compounds, respectively. Considering the crystalline structure, it was suggested that the lithium ionic diffusion between 48g(96h)-24d corresponds to the low-temperature peak and 48g(96h)-48g(96h) to the high-temperature peak.

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Gao Y. X. et al. Mechanism of lithium ion diffusion in the hexad substituted Li7La3Zr2O12 solid electrolytes // Solid State Ionics. 2016. Vol. 291. pp. 1-7.
GOST all authors (up to 50) Copy
Gao Y. X., Wang X., Lu H., Zhang L., Ma L., FANG Q. F. Mechanism of lithium ion diffusion in the hexad substituted Li7La3Zr2O12 solid electrolytes // Solid State Ionics. 2016. Vol. 291. pp. 1-7.
RIS |
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RIS Copy
TY - JOUR
DO - 10.1016/j.ssi.2016.04.017
UR - https://doi.org/10.1016/j.ssi.2016.04.017
TI - Mechanism of lithium ion diffusion in the hexad substituted Li7La3Zr2O12 solid electrolytes
T2 - Solid State Ionics
AU - Gao, Y. X.
AU - Wang, Xianping
AU - Lu, H.
AU - Zhang, Lai-Chang
AU - Ma, L.
AU - FANG, Q. F.
PY - 2016
DA - 2016/08/01 00:00:00
PB - Elsevier
SP - 1-7
VL - 291
SN - 0167-2738
ER -
BibTex
Cite this
BibTex Copy
@article{2016_Gao,
author = {Y. X. Gao and Xianping Wang and H. Lu and Lai-Chang Zhang and L. Ma and Q. F. FANG},
title = {Mechanism of lithium ion diffusion in the hexad substituted Li7La3Zr2O12 solid electrolytes},
journal = {Solid State Ionics},
year = {2016},
volume = {291},
publisher = {Elsevier},
month = {aug},
url = {https://doi.org/10.1016/j.ssi.2016.04.017},
pages = {1--7},
doi = {10.1016/j.ssi.2016.04.017}
}
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