A comparative study of LiTa2PO8 ceramics prepared with different lithium sources

IF 5.8 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Journal of Alloys and Compounds Pub Date : 2024-12-03 DOI:10.1016/j.jallcom.2024.177923

K. Kwatek, W. Ślubowska-Walkusz, J.L. Nowiński, A.T. Krawczyńska, I. Sobrados, V. Diez-Gómez, J. Sanz

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引用次数: 0

Abstract

In advancing lithium-ion batteries, solid electrolytes like LiTa₂PO₈, a Li-ion conductor with high bulk conductivity (~10⁻³ S/cm), show promise for all-solid-state battery technology. Here, we investigate the impact of different Li sources and their excess on the structural, microstructural and electrical properties of LiTa₂PO₈ ceramics. Employing diverse characterization techniques, including XRD, MAS NMR, TMA, SEM/EDS, IS, DC potentiostatic polarization, and density measurements, we unveil significant impact of the source of lithium ions and its excess on electrical properties. The sample without excess LiNO₃ source exhibited the highest σ_tot = 5.2×10⁻⁴ S/cm at 30°C. Notably, the grain conductivity remained constant at ca. 3 mS/cm, irrespective of the chosen lithium source and excess. The microstructural analysis uncovered correlations between variations in total ionic conductivity and changes in the nature and concentration of secondary phases. Additionally, it revealed the influence of the arrangement of grains affecting the grain boundaries and porosity regions.

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来源期刊

Journal of Alloys and Compounds 工程技术-材料科学：综合

CiteScore

11.10

自引率

14.50%

发文量

5146

审稿时长

67 days

期刊介绍： The Journal of Alloys and Compounds is intended to serve as an international medium for the publication of work on solid materials comprising compounds as well as alloys. Its great strength lies in the diversity of discipline which it encompasses, drawing together results from materials science, solid-state chemistry and physics.