Solid State Ionics, volume 295, pages 32-40

Study of the glass-to-crystal transformation of the NASICON-type solid electrolyte Li1 + xAlxGe2 − x(PO4)3

Publication typeJournal Article
Publication date2016-11-01
Quartile SCImago
Q2
Quartile WOS
Q2
Impact factor3.2
ISSN01672738
General Chemistry
Condensed Matter Physics
General Materials Science
Abstract
In this study, we present a detailed investigation of the glass to crystal transformation in the Li 1 + x Al x Ge 2 − x P 3 O 12 (LAGP) system. Precursor glasses were synthesized following melt-quench and sol-gel procedures. The glass to crystal transition was studied employing X-ray diffraction and advanced solid state nuclear magnetic resonance (solid state NMR) techniques including 7 Li-, 27 Al-, 31 P NMR, 27 Al{ 7 Li}- and 27 Al{ 31 P}-REDOR-NMR as well as 31 P{ 27 Al}-REAPDOR-NMR. Whereas Al-poor LAGP precursor glasses exhibit a direct glass-to-LAGP crystal transition, without any extended change in the Al content of the LAGP crystals and without the formation of side phases, for glasses richer in Al the crystallization of LAGP is accompanied by the formation of AlPO 4 , which for x = 1.0 is the first crystalline phase to precipitate. For these compositions, the first crystalline LAGP phase precipitating contains an Al content lower than the nominal x-value, however, with annealing, more Al is continuously incorporated into the LAGP structure, accompanied by a decrease in the relative amount of the AlPO 4 phase. After surpassing a threshold temperature – which decreases from T = 900 °C for x = 0.4 to 720 °C for x = 0.8 – at which the LAGP phases reaches its highest Al content, close to the nominal composition, Al is gradually expelled from the LAGP structure, forming LGP and AlPO 4 . The findings enable the formation of virtually phase pure LAGP over an extended compositional range until x = 0.8.

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Liu Z. et al. Study of the glass-to-crystal transformation of the NASICON-type solid electrolyte Li1 + xAlxGe2 − x(PO4)3 // Solid State Ionics. 2016. Vol. 295. pp. 32-40.
GOST all authors (up to 50) Copy
Liu Z., Venkatachalam S., Kirchhain H., van Wüllen L. Study of the glass-to-crystal transformation of the NASICON-type solid electrolyte Li1 + xAlxGe2 − x(PO4)3 // Solid State Ionics. 2016. Vol. 295. pp. 32-40.
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RIS Copy
TY - JOUR
DO - 10.1016/j.ssi.2016.07.006
UR - https://doi.org/10.1016/j.ssi.2016.07.006
TI - Study of the glass-to-crystal transformation of the NASICON-type solid electrolyte Li1 + xAlxGe2 − x(PO4)3
T2 - Solid State Ionics
AU - Liu, Zhongqing
AU - Venkatachalam, Sabarinathan
AU - Kirchhain, Holger
AU - van Wüllen, Leo
PY - 2016
DA - 2016/11/01 00:00:00
PB - Elsevier
SP - 32-40
VL - 295
SN - 0167-2738
ER -
BibTex
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BibTex Copy
@article{2016_Liu,
author = {Zhongqing Liu and Sabarinathan Venkatachalam and Holger Kirchhain and Leo van Wüllen},
title = {Study of the glass-to-crystal transformation of the NASICON-type solid electrolyte Li1 + xAlxGe2 − x(PO4)3},
journal = {Solid State Ionics},
year = {2016},
volume = {295},
publisher = {Elsevier},
month = {nov},
url = {https://doi.org/10.1016/j.ssi.2016.07.006},
pages = {32--40},
doi = {10.1016/j.ssi.2016.07.006}
}
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