Facile synthesis of monoclinic (NH4)2V4O9 nanosheets for zinc-ion batteries

IF 5.5 3区材料科学 Q1 ELECTROCHEMISTRY

Electrochimica Acta Pub Date : 2024-10-23 DOI:10.1016/j.electacta.2024.145264

Chongchong Li , Changyu Zhou , Jiangyong Xiong , Xinying Li

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Abstract

Aqueous zinc-ion batteries (ZIBs) are increasingly popular due to their low cost and high safety. However, the quest for cathode materials with robust internal structures and efficient ion transport pathways remains critical. In this study, we introduce a simple hydrothermal method to synthesize monoclinic (NH₄)₂V₄O₉ nanosheets, serving as a advanced cathode for ZIBs. This material demonstrates outstanding electrochemical properties, with a high specific capacity of 389 mAh g⁻¹ at 0.1 A g⁻¹, and retains 78.9 % capacity after 3000 cycles at 1 A g⁻¹ and 77.3 % after 15,000 cycles at 5 A g⁻¹. Additionally, it achieves an energy density of 325 Wh kg⁻¹ at 101 W kg⁻¹. In-depth electrochemical analysis reveals the structural stability during reversible Zn²⁺ ion intercalation/de-intercalation, underscoring the potential of (NH₄)₂V₄O₉ as a high-performance material for ZIBs.

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用于锌-离子电池的单斜 (NH4)2V4O9 纳米片的简单合成

锌离子水电池（ZIB）因其低成本和高安全性而越来越受欢迎。然而，寻找具有坚固内部结构和高效离子传输途径的阴极材料仍然至关重要。在本研究中，我们介绍了一种简单的水热法合成单斜 (NH4)2V4O9 纳米片，作为 ZIB 的先进阴极材料。这种材料具有出色的电化学性能，在 0.1 A g-1 条件下，比容量高达 389 mAh g-1，在 1 A g-1 条件下循环 3000 次后，容量保持率为 78.9%，在 5 A g-1 条件下循环 15000 次后，容量保持率为 77.3%。此外，在 101 W kg-1 的条件下，它的能量密度达到 325 Wh kg-1。深入的电化学分析揭示了 Zn2+ 离子可逆插层/去插层过程中的结构稳定性，凸显了 (NH4)2V4O9 作为 ZIB 高性能材料的潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Electrochimica Acta 工程技术-电化学

CiteScore

11.30

自引率

6.10%

发文量

1634

审稿时长

41 days

期刊介绍： Electrochimica Acta is an international journal. It is intended for the publication of both original work and reviews in the field of electrochemistry. Electrochemistry should be interpreted to mean any of the research fields covered by the Divisions of the International Society of Electrochemistry listed below, as well as emerging scientific domains covered by ISE New Topics Committee.