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Microwave Crystallization of Lithium Aluminum Germanium Phosphate Solid-State Electrolyte

Lithium aluminum germanium phosphate (LAGP) glass-ceramics are considered as promising solid-state electrolytes for Li-ion batteries. LAGP glass was prepared via the regular conventional melt-quenching method. Thermal, chemical analyses and X-ray diffraction (XRD) were performed to characterize the...

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Autores principales: Mahmoud, Morsi M., Cui, Yuantao, Rohde, Magnus, Ziebert, Carlos, Link, Guido, Seifert, Hans Juergen
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5456905/
https://www.ncbi.nlm.nih.gov/pubmed/28773627
http://dx.doi.org/10.3390/ma9070506
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author Mahmoud, Morsi M.
Cui, Yuantao
Rohde, Magnus
Ziebert, Carlos
Link, Guido
Seifert, Hans Juergen
author_facet Mahmoud, Morsi M.
Cui, Yuantao
Rohde, Magnus
Ziebert, Carlos
Link, Guido
Seifert, Hans Juergen
author_sort Mahmoud, Morsi M.
collection PubMed
description Lithium aluminum germanium phosphate (LAGP) glass-ceramics are considered as promising solid-state electrolytes for Li-ion batteries. LAGP glass was prepared via the regular conventional melt-quenching method. Thermal, chemical analyses and X-ray diffraction (XRD) were performed to characterize the prepared glass. The crystallization of the prepared LAGP glass was done using conventional heating and high frequency microwave (MW) processing. Thirty GHz microwave (MW) processing setup were used to convert the prepared LAGP glass into glass-ceramics and compared with the conventionally crystallized LAGP glass-ceramics that were heat-treated in an electric conventional furnace. The ionic conductivities of the LAGP samples obtained from the two different routes were measured using impedance spectroscopy. These samples were also characterized using XRD and scanning electron microscopy (SEM). Microwave processing was successfully used to crystallize LAGP glass into glass-ceramic without the aid of susceptors. The MW treated sample showed higher total, grains and grain boundary ionic conductivities values, lower activation energy and relatively larger-grained microstructure with less porosity compared to the corresponding conventionally treated sample at the same optimized heat-treatment conditions. The enhanced total, grains and grain boundary ionic conductivities values along with the reduced activation energy that were observed in the MW treated sample was considered as an experimental evidence for the existence of the microwave effect in LAGP crystallization process. MW processing is a promising candidate technology for the production of solid-state electrolytes for Li-ion battery.
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spelling pubmed-54569052017-07-28 Microwave Crystallization of Lithium Aluminum Germanium Phosphate Solid-State Electrolyte Mahmoud, Morsi M. Cui, Yuantao Rohde, Magnus Ziebert, Carlos Link, Guido Seifert, Hans Juergen Materials (Basel) Article Lithium aluminum germanium phosphate (LAGP) glass-ceramics are considered as promising solid-state electrolytes for Li-ion batteries. LAGP glass was prepared via the regular conventional melt-quenching method. Thermal, chemical analyses and X-ray diffraction (XRD) were performed to characterize the prepared glass. The crystallization of the prepared LAGP glass was done using conventional heating and high frequency microwave (MW) processing. Thirty GHz microwave (MW) processing setup were used to convert the prepared LAGP glass into glass-ceramics and compared with the conventionally crystallized LAGP glass-ceramics that were heat-treated in an electric conventional furnace. The ionic conductivities of the LAGP samples obtained from the two different routes were measured using impedance spectroscopy. These samples were also characterized using XRD and scanning electron microscopy (SEM). Microwave processing was successfully used to crystallize LAGP glass into glass-ceramic without the aid of susceptors. The MW treated sample showed higher total, grains and grain boundary ionic conductivities values, lower activation energy and relatively larger-grained microstructure with less porosity compared to the corresponding conventionally treated sample at the same optimized heat-treatment conditions. The enhanced total, grains and grain boundary ionic conductivities values along with the reduced activation energy that were observed in the MW treated sample was considered as an experimental evidence for the existence of the microwave effect in LAGP crystallization process. MW processing is a promising candidate technology for the production of solid-state electrolytes for Li-ion battery. MDPI 2016-06-23 /pmc/articles/PMC5456905/ /pubmed/28773627 http://dx.doi.org/10.3390/ma9070506 Text en © 2016 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC-BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Mahmoud, Morsi M.
Cui, Yuantao
Rohde, Magnus
Ziebert, Carlos
Link, Guido
Seifert, Hans Juergen
Microwave Crystallization of Lithium Aluminum Germanium Phosphate Solid-State Electrolyte
title Microwave Crystallization of Lithium Aluminum Germanium Phosphate Solid-State Electrolyte
title_full Microwave Crystallization of Lithium Aluminum Germanium Phosphate Solid-State Electrolyte
title_fullStr Microwave Crystallization of Lithium Aluminum Germanium Phosphate Solid-State Electrolyte
title_full_unstemmed Microwave Crystallization of Lithium Aluminum Germanium Phosphate Solid-State Electrolyte
title_short Microwave Crystallization of Lithium Aluminum Germanium Phosphate Solid-State Electrolyte
title_sort microwave crystallization of lithium aluminum germanium phosphate solid-state electrolyte
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5456905/
https://www.ncbi.nlm.nih.gov/pubmed/28773627
http://dx.doi.org/10.3390/ma9070506
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