Rare-Earth Ions Regulating Lattice-Softened Bromide Solid Electrolytes for Highly Stable Fast-Charging Solid-State Batteries

IF 9.6 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Nano Letters Pub Date : 2025-05-03 DOI:10.1021/acs.nanolett.5c00509

Xiaomeng Shi, Zhichao Zeng, Qian Zhang, Yaping Du

引用次数: 0

Abstract

All-solid-state lithium-based batteries (ASSLBs) with good safety and high energy density are valuable. To realize stable and high-efficiency ASSLBs, high-performance solid-state electrolytes (SEs) with good processability are necessary. Bromide (Br)-based rare-earth halide SEs (RE-HSEs) exhibit good deformability for large radii of RE and Br ions. Here, the influence of RE ions on the crystalline structure and mechanical properties of Br-based RE-HSEs (RE = Y, Gd, Tb, Ho, or Er) was analyzed in detail, and Li₃GdBr₆ (LGdB) showed the softest lattice and the best deformability due to having the longest RE–Br bond length. Furthermore, LGdB exhibits satisfactory ionic conduction ability (1.4 mS cm^–1), and the assembled ASSLBs exhibit a reversible redox process, excellent fast-charging performance, and superior cycling stability for 6000 cycles at 10 C. This study indicates that the relationship between the RE and deformability of Br-based RE-HSEs is significant for the rational design and improvement of HSEs in ASSLBs.

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稀土离子调控高稳定快速充电固态电池的晶格软化溴化物固体电解质

安全性好、能量密度高的全固态锂基电池具有重要的应用价值。为了实现稳定、高效的asslb，需要具有良好加工性能的高性能固态电解质。溴基稀土卤化物（RE- hses）对稀土和溴离子的大半径具有良好的变形能力。本文详细分析了稀土离子对br基RE- hses （RE = Y, Gd, Tb, Ho, or Er）晶体结构和力学性能的影响，发现Li3GdBr6 （LGdB）由于RE- br键长最长，晶格最软，变形能力最好。此外，LGdB具有令人满意的离子传导能力（1.4 mS cm-1），组装的asslb具有可逆的氧化还原过程、优异的快速充电性能和优异的10℃6000次循环稳定性。研究表明，br基RE-HSEs的RE与可变形性之间的关系对asslb中HSEs的合理设计和改进具有重要意义。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Nano Letters 工程技术-材料科学：综合

CiteScore

16.80

自引率

2.80%

发文量

1182

审稿时长

1.4 months

期刊介绍： Nano Letters serves as a dynamic platform for promptly disseminating original results in fundamental, applied, and emerging research across all facets of nanoscience and nanotechnology. A pivotal criterion for inclusion within Nano Letters is the convergence of at least two different areas or disciplines, ensuring a rich interdisciplinary scope. The journal is dedicated to fostering exploration in diverse areas, including: - Experimental and theoretical findings on physical, chemical, and biological phenomena at the nanoscale - Synthesis, characterization, and processing of organic, inorganic, polymer, and hybrid nanomaterials through physical, chemical, and biological methodologies - Modeling and simulation of synthetic, assembly, and interaction processes - Realization of integrated nanostructures and nano-engineered devices exhibiting advanced performance - Applications of nanoscale materials in living and environmental systems Nano Letters is committed to advancing and showcasing groundbreaking research that intersects various domains, fostering innovation and collaboration in the ever-evolving field of nanoscience and nanotechnology.