Bimetallic Sulfides Cr0.99V1.8S4 with Loosely Packed Structure: Exploring the Boundary of Conversion and Intercalation Sodium-Ion Storage Mechanism

IF 9.1 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Nano Letters Pub Date : 2025-01-27 DOI:10.1021/acs.nanolett.4c0475010.1021/acs.nanolett.4c04750

Keyan Hu*, Wen Chen, Youtan Pan, Shuai Li, Zhuoran Lv, Yuting He, Chong Zheng, Fuqiang Huang and Wujie Dong*,

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Abstract

Metal sulfide electrodes for sodium-ion batteries face trade-offs among high capacity, fast kinetics, and stability. The challenge lies in breaking and restoring metal–sulfur bonds and allowing rapid ionic transport. Here we explore the boundary of conversion- and intercalation-type metal sulfides to develop ideal sodium-ion storage materials. We focus on sulfides of vanadium and chromium because of their adjacent atomic numbers but different energy storage mechanism. Among various sulfides of vanadium and chromium, a loosely packed bimetallic sulfide, Cr_0.99V_1.8S₄, with cationic vacancies and metallic conductivity (4.28 S m^–1), shows optimal sodium-ion storage performance: an initial Coulombic efficiency of 95.6%, a reversible capacity of 551 mAh g^–1 at 1.6 C, and maintaining 100% capacity after 600 cycles at a high rate of 16–66 C.

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具有松散堆积结构的双金属硫化物Cr0.99V1.8S4：转换和插层钠离子储存机制的边界探索

用于钠离子电池的金属硫化物电极面临着高容量、快速动力学和稳定性之间的权衡。挑战在于打破和恢复金属-硫键，并允许快速离子传输。在这里，我们探索转换型和插层型金属硫化物的边界，以开发理想的钠离子存储材料。我们主要研究钒和铬的硫化物，因为它们原子序数相邻，但能量储存机制不同。在钒铬的多种硫化物中，具有阳离子空位和金属电导率（4.28 S m-1）的松散填充双金属硫化物Cr0.99V1.8S4具有最佳的钠离子存储性能：初始库仑效率为95.6%，在1.6℃下可逆容量为551 mAh g-1，在16-66℃的高倍率下循环600次后容量保持100%。

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.