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Synergetic Effect of Li-Ion Concentration and Triple Doping on Ionic Conductivity of Li(7)La(3)Zr(2)O(12) Solid Electrolyte
Li(7)La(3)Zr(2)O(12) (LLZO) is a promising and safe solid electrolyte for all-solid-state batteries. To achieve high ionic conductivity of LLZO, stabilizing the cubic phase and reducing Li loss during the sintering process is essential. Therefore, reducing the sintering temperature, which increases...
Autores principales: | , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9457903/ https://www.ncbi.nlm.nih.gov/pubmed/36079983 http://dx.doi.org/10.3390/nano12172946 |
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author | Nguyen, Minh Hai Park, Sangbaek |
author_facet | Nguyen, Minh Hai Park, Sangbaek |
author_sort | Nguyen, Minh Hai |
collection | PubMed |
description | Li(7)La(3)Zr(2)O(12) (LLZO) is a promising and safe solid electrolyte for all-solid-state batteries. To achieve high ionic conductivity of LLZO, stabilizing the cubic phase and reducing Li loss during the sintering process is essential. Therefore, reducing the sintering temperature, which increases the sintering time for high-density pellets, is necessary. Herein, we investigate the change in the crystal structure, morphology, and Li ionic conductivity of LLZO pellets by triple doping with Al, Ga, and Ta and modulating the variation in initial Li concentrations. Interestingly, the proportion of the conductive cubic phase increased with increasing Li stoichiometry by 1.1 times, and this tendency was further accelerated by triple doping. The synergetic effects of triple doping and Li concentration also minimized Li loss during sintering. Accordingly, it provided a high-quality LLZO pellet with good ionic conductivity (3.6 × 10(−4) S cm(−1)) and high relative density (97.8%). Notably, the LLZO pellet was obtained using a very short sintering process (40 min). Considering that the most time-consuming step is the sintering process for LLZO, this study can provide guidelines for the fast production and commercialization of LLZO electrolytes with high ionic conductivity. |
format | Online Article Text |
id | pubmed-9457903 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-94579032022-09-09 Synergetic Effect of Li-Ion Concentration and Triple Doping on Ionic Conductivity of Li(7)La(3)Zr(2)O(12) Solid Electrolyte Nguyen, Minh Hai Park, Sangbaek Nanomaterials (Basel) Article Li(7)La(3)Zr(2)O(12) (LLZO) is a promising and safe solid electrolyte for all-solid-state batteries. To achieve high ionic conductivity of LLZO, stabilizing the cubic phase and reducing Li loss during the sintering process is essential. Therefore, reducing the sintering temperature, which increases the sintering time for high-density pellets, is necessary. Herein, we investigate the change in the crystal structure, morphology, and Li ionic conductivity of LLZO pellets by triple doping with Al, Ga, and Ta and modulating the variation in initial Li concentrations. Interestingly, the proportion of the conductive cubic phase increased with increasing Li stoichiometry by 1.1 times, and this tendency was further accelerated by triple doping. The synergetic effects of triple doping and Li concentration also minimized Li loss during sintering. Accordingly, it provided a high-quality LLZO pellet with good ionic conductivity (3.6 × 10(−4) S cm(−1)) and high relative density (97.8%). Notably, the LLZO pellet was obtained using a very short sintering process (40 min). Considering that the most time-consuming step is the sintering process for LLZO, this study can provide guidelines for the fast production and commercialization of LLZO electrolytes with high ionic conductivity. MDPI 2022-08-26 /pmc/articles/PMC9457903/ /pubmed/36079983 http://dx.doi.org/10.3390/nano12172946 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/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 (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Nguyen, Minh Hai Park, Sangbaek Synergetic Effect of Li-Ion Concentration and Triple Doping on Ionic Conductivity of Li(7)La(3)Zr(2)O(12) Solid Electrolyte |
title | Synergetic Effect of Li-Ion Concentration and Triple Doping on Ionic Conductivity of Li(7)La(3)Zr(2)O(12) Solid Electrolyte |
title_full | Synergetic Effect of Li-Ion Concentration and Triple Doping on Ionic Conductivity of Li(7)La(3)Zr(2)O(12) Solid Electrolyte |
title_fullStr | Synergetic Effect of Li-Ion Concentration and Triple Doping on Ionic Conductivity of Li(7)La(3)Zr(2)O(12) Solid Electrolyte |
title_full_unstemmed | Synergetic Effect of Li-Ion Concentration and Triple Doping on Ionic Conductivity of Li(7)La(3)Zr(2)O(12) Solid Electrolyte |
title_short | Synergetic Effect of Li-Ion Concentration and Triple Doping on Ionic Conductivity of Li(7)La(3)Zr(2)O(12) Solid Electrolyte |
title_sort | synergetic effect of li-ion concentration and triple doping on ionic conductivity of li(7)la(3)zr(2)o(12) solid electrolyte |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9457903/ https://www.ncbi.nlm.nih.gov/pubmed/36079983 http://dx.doi.org/10.3390/nano12172946 |
work_keys_str_mv | AT nguyenminhhai synergeticeffectofliionconcentrationandtripledopingonionicconductivityofli7la3zr2o12solidelectrolyte AT parksangbaek synergeticeffectofliionconcentrationandtripledopingonionicconductivityofli7la3zr2o12solidelectrolyte |