多孔 V2CTx MXene 作为高稳定性锌阳极保护涂层

IF 9.6 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Nano Letters Pub Date : 2024-11-07 DOI:10.1021/acs.nanolett.4c02347

Guanyu Ma, Kerun Chen, He Qiao, Jiaxin Liu, Honglei Dong, Yu Gao

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引用次数: 0

摘要

锌水电池因其环保和高能量密度而具有巨大的研究潜力。然而，锌阳极上树枝状突起的形成和锌离子缓慢的扩散动力学会对锌离子电池的循环寿命产生不利影响。在这项研究中，我们采用多孔 V2CTx（MVMX）作为锌阳极的保护层。MVMX 的均匀多孔结构促进了活性位点的暴露，有利于锌离子的传输。值得注意的是，Zn@Ti 半电池在 1500 个循环中的平均 CE 值达到 99.7%。此外，锌-锌对称电池在 5 mA cm-2 和 1 mAh cm-2 的电流密度下稳定循环 1600 小时。此外，MVMX@Zn||V2O5 全电池的容量为 198 mAh g-1，在 1 A g-1 的条件下循环 5000 次后，容量仍保持在 124.75 mAh g-1，这证明了采用替代性 MXenes 制造稳定锌阳极的潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Porous V2CTx MXene as a High Stability Zinc Anode Protective Coating

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Porous V2CTx MXene as a High Stability Zinc Anode Protective Coating

Aqueous Zn batteries exhibit significant research potential owing to their environmental friendliness and high energy density. Nevertheless, the formation of dendrites on the zinc anode and the sluggish diffusion kinetics of zinc ions adversely affect the cycle life of zinc ion batteries. In this study, we employ porous V₂CT_x (MVMX) as a protective layer for the zinc anode. The uniform porous structure of MVMX promotes active site exposure and facilitates the transport of zinc ions. Remarkably, the Zn@Ti half-cell demonstrated an average CE of 99.7% in 1500 cycles. Furthermore, the Zn–Zn symmetric battery exhibited stable cycling for 1600 h at current densities of 5 mA cm^–2 and 1 mAh cm^–2. Additionally, the MVMX@Zn||V₂O₅ full cell exhibited a capacity of 198 mAh g^–1 and retained a capacity of 124.75 mAh g^–1 after 5000 cycles at 1 A g^–1, demonstrating the potential of employing alternative MXenes for fabricating stable zinc anodes.

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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.