Synthesis of a Li3−xInCl6−x solid electrolyte and its application in all-solid-state batteries

IF 3 4区 材料科学 Q3 CHEMISTRY, PHYSICAL
Nguyen Anh Khoa , Nguyen Thi Minh Nguyet , Tran Viet Toan , Ly Minh Dang , Nguyen Xuan Manh , Tran Anh Tu , Nguyen Huu Huy Phuc
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引用次数: 0

Abstract

The ionic conductivity and electrochemical stability of Li3InCl6 solid electrolytes (SEs) can be enhanced through covalent substitutions of In and Cl. Although the ionic conductivity of Li3InCl6 has been extensively studied, the dynamics of Li ions in these systems have been rarely reported. In this study, Li3−xInCl6−x (0 ≤ x ≤ 0.1) SEs were synthesized via planetary ball-milling, followed by heat treatment at 260 °C for 4 h in a dry Ar atmosphere. The structures of the resulting samples were characterized using X-ray diffraction and scanning electron microscopy–energy-dispersive spectroscopy. Crystal structures were confirmed via Rietveld refinement using Fullprof software, and the mean crystallite size was estimated using the Halder–Wagner–Langford plot. Lattice strain was determined using the Williamson–Hall equation. The sample with x = 0.05 exhibited the highest ionic conductivity (4.57 × 10−3 Scm−1) at 30 °C. Results show that ion carrier formation is the main barrier to Li ion movement in the Li3−xInCl6−x (0 ≤ x ≤ 0.1). Furthermore, an all-solid-state cell with Li2.95InCl5.95 SE remained stable after 50 cycles, demonstrating the compatibility of the SE with bare LiNi0.5Mn0.3Co0.2O2.
Li3−xInCl6−x固态电解质的合成及其在全固态电池中的应用
通过In和Cl的共价取代可以提高Li3InCl6固体电解质(SEs)的离子电导率和电化学稳定性。虽然Li3InCl6的离子电导率已经被广泛研究,但这些体系中Li离子的动力学很少被报道。本研究采用行星球磨法制备了Li3−xInCl6−x(0≤x≤0.1)se,然后在干燥氩气中260℃热处理4 h。用x射线衍射、扫描电子显微镜-能谱对样品的结构进行了表征。晶体结构用Fullprof软件通过Rietveld细化确认,平均晶体尺寸用Halder-Wagner-Langford图估计。点阵应变用Williamson-Hall方程确定。x = 0.05的样品在30°C时离子电导率最高(4.57 × 10−3 Scm−1)。结果表明,离子载流子的形成是Li3−xInCl6−x中Li离子运动的主要障碍(0≤x≤0.1)。此外,使用Li2.95InCl5.95 SE的全固态电池在循环50次后仍保持稳定,证明了SE与裸LiNi0.5Mn0.3Co0.2O2的兼容性。
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来源期刊
Solid State Ionics
Solid State Ionics 物理-物理:凝聚态物理
CiteScore
6.10
自引率
3.10%
发文量
152
审稿时长
58 days
期刊介绍: This interdisciplinary journal is devoted to the physics, chemistry and materials science of diffusion, mass transport, and reactivity of solids. The major part of each issue is devoted to articles on: (i) physics and chemistry of defects in solids; (ii) reactions in and on solids, e.g. intercalation, corrosion, oxidation, sintering; (iii) ion transport measurements, mechanisms and theory; (iv) solid state electrochemistry; (v) ionically-electronically mixed conducting solids. Related technological applications are also included, provided their characteristics are interpreted in terms of the basic solid state properties. Review papers and relevant symposium proceedings are welcome.
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