Electrochemical performance enhancement of perovskite-type Li0.3La0.57TiO3 ceramic electrolyte by controlling synthesis parameters

IF 5.8 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of The European Ceramic Society Pub Date : 2024-10-05 DOI:10.1016/j.jeurceramsoc.2024.116972

Maycol F. Mena , Ferley A. Vásquez , Oceane Florentin , Jadra Mosa , Mario Aparicio , Jorge A. Calderón , Nataly Carolina Rosero-Navarro

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引用次数: 0

Abstract

This study investigates the enhancement of the electrochemical performance of perovskite-type Li_0.3La_0.57TiO₃ (LLTO) solid electrolytes through the optimization of synthesis parameters of a sol-gel process. The primary focus lies in examining the impact of calcination temperature on the structural, morphological, and electrochemical properties of LLTO. Our findings reveal that controlling the calcination temperature significantly influences the grain boundary resistance and overall ionic conductivity. The optimal calcination temperature was identified to be 800 °C, yielding a remarkable improvement in ionic conductivity at grain boundaries (0.88 mS/cm), and total ionic conductivity (0.54 mS/cm), at 30 °C. This enhancement is attributed to the refined microstructure, increased density, and reduced porosity, which collectively facilitate lithium-ion diffusion. These advancements in LLTO electrolytes present promising implications for their application in all-solid-state lithium-ion batteries, offering a safer and more efficient alternative to conventional liquid electrolyte systems.

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通过控制合成参数提高透辉石型 Li0.3La0.57TiO3 陶瓷电解质的电化学性能

本研究探讨了通过优化溶胶-凝胶工艺的合成参数来提高透辉石型 Li0.3La0.57TiO3（LLTO）固体电解质的电化学性能。主要重点是研究煅烧温度对 LLTO 的结构、形态和电化学性能的影响。我们的研究结果表明，控制煅烧温度可显著影响晶界电阻和整体离子导电性。最佳煅烧温度为 800 ℃，在 30 ℃ 时，晶界离子电导率（0.88 mS/cm）和总离子电导率（0.54 mS/cm）显著提高。这种提高归功于微观结构的细化、密度的提高和孔隙率的降低，它们共同促进了锂离子的扩散。LLTO 电解质的这些进步为其在全固态锂离子电池中的应用带来了希望，为传统液态电解质系统提供了更安全、更高效的替代品。

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来源期刊

Journal of The European Ceramic Society 工程技术-材料科学：硅酸盐

CiteScore

10.70

自引率

12.30%

发文量

863

审稿时长

35 days

期刊介绍： The Journal of the European Ceramic Society publishes the results of original research and reviews relating to ceramic materials. Papers of either an experimental or theoretical character will be welcomed on a fully international basis. The emphasis is on novel generic science concerning the relationships between processing, microstructure and properties of polycrystalline ceramics consolidated at high temperature. Papers may relate to any of the conventional categories of ceramic: structural, functional, traditional or composite. The central objective is to sustain a high standard of research quality by means of appropriate reviewing procedures.