无阳极钠金属电池具有调谐Na成核和输运的金属间层

IF 9.1 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Nano Letters Pub Date : 2025-01-27 DOI:10.1021/acs.nanolett.4c04282

Jie Shi, Danni Wang, Qun Liu, Zhenlu Yu, Jian-Qiu Huang, Biao Zhang

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引用次数: 0

摘要

无预沉积Na（无阳极）和少量Na金属（无阳极）的钠金属电池由于其具有竞争力的能量密度和高钠丰度而受到越来越多的关注。然而，严重的界面问题导致循环稳定性差，库仑效率低。本文采用由金属间纳米粒子（Sn-Cu和Sn-Ni）组成的轻质界面层来改善Na的镀/剥离行为。这些层提供了均匀的播种位置，具有高亲钠性，并支持快速离子传输。在sncu涂层的铝上，在1 mA cm-2和1 mAh cm-2下循环500次，实现了可逆的Na电镀/剥离行为，具有高达99.95%的高库仑效率，标准偏差为0.0013。因此，高负载7.6 mg cm-2的无阳极Na3V2(PO4)3满电池在200次循环后的容量保持率为90%。这一策略为开发无阳极金属钠电池提供了一条有效途径。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Intermetallic Layers with Tuned Na Nucleation and Transport for Anode-Free Sodium Metal Batteries

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Intermetallic Layers with Tuned Na Nucleation and Transport for Anode-Free Sodium Metal Batteries

Sodium metal batteries without pre-deposited Na (anode-free) and with a limited amount of Na metal (anode-less) have attracted increasing attention due to their competitive energy density and the high abundance of sodium. However, severe interfacial issues result in poor cycling stability and low Coulombic efficiency. Here, the lightweight interphase layers composed of intermetallic nanoparticles (Sn–Cu and Sn–Ni) are applied to improve Na plating/stripping behaviors. These layers provide uniform seeding sites with high sodiophilicity and support fast ion transport. A reversible Na plating/stripping behavior, featuring a high Coulombic efficiency of ∼99.95% with a minor standard deviation of 0.0013, for 500 cycles at 1 mA cm^–2 and 1 mAh cm^–2 is achieved on SnCu-coated Al. Consequently, the anode-free Na₃V₂(PO₄)₃ full cell with a high loading of 7.6 mg cm^–2 exhibits a capacity retention of 90% after 200 cycles. This strategy provides an effective pathway toward anode-free sodium metal batteries.

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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.