Mg3V4(PO4)6: A Potential Cathode Material with High Stability for Aqueous Zinc-Ion Batteries

IF 8.3 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY ACS Applied Materials & Interfaces Pub Date : 2024-09-12 DOI:10.1021/acsaem.4c0152610.1021/acsaem.4c01526

Xueli Bi, Qianqian Zhang, Wenhua Gao, Shanshan Liu, Ye Liu, Xin Yang, Yanyang Han* and Kai Feng*,

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Abstract

Aqueous zinc-ion batteries (AZIBs) have wide application prospects in the field of large-scale energy storage systems. The lack of a suitable cathode material is an important factor limiting the development of AZIBs. Polyanionic phosphate Mg₃V₄(PO₄)₆ has a stable three-dimensional framework structure and open zinc-ion transmission channels, which are conducive to zinc-ion storage. Here, a carbon-coated Mg₃V₄(PO₄)₆@C cathode material is synthesized, and the zinc-ion storage properties are studied for the first time. Benefiting from the open ion transport channels and fast electron transport paths, Mg₃V₄(PO₄)₆@C shows a favorable electrochemical performance. The Mg₃V₄(PO₄)₆@C cathode delivers a specific capacity of 84 mA h·g^–1 at 0.04 A·g^–1 and good cycle stability, with a capacity retention of 85% after 100 cycles. The electrochemical reaction mechanism is investigated by ex situ X-ray diffraction and ex situ X-ray photoelectron spectroscopy. This work deepens our understanding of the proton and zinc-ion storage behavior in Mg₃V₄(PO₄)₆ cathode materials.

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Mg3V4(PO4)6：一种具有高稳定性的潜在锌离子水电池阴极材料

锌离子水电池（AZIBs）在大规模储能系统领域具有广泛的应用前景。缺乏合适的阴极材料是限制 AZIBs 发展的一个重要因素。多阴离子磷酸Mg3V4(PO4)6具有稳定的三维框架结构和开放的锌离子传输通道，有利于锌离子的储存。本文合成了碳包覆 Mg3V4(PO4)6@C 阴极材料，并首次研究了其锌离子存储特性。得益于开放的离子传输通道和快速电子传输路径，Mg3V4(PO4)6@C 显示出良好的电化学性能。在 0.04 A-g-1 的条件下，Mg3V4(PO4)6@C 阴极的比容量为 84 mA h-g-1，并且具有良好的循环稳定性，循环 100 次后容量保持率为 85%。我们通过原位 X 射线衍射和原位 X 射线光电子能谱研究了电化学反应机理。这项研究加深了我们对 Mg3V4(PO4)6 阴极材料中质子和锌离子存储行为的理解。

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来源期刊

ACS Applied Materials & Interfaces 工程技术-材料科学：综合

CiteScore

16.00

自引率

6.30%

发文量

4978

审稿时长

1.8 months

期刊介绍： ACS Applied Materials & Interfaces is a leading interdisciplinary journal that brings together chemists, engineers, physicists, and biologists to explore the development and utilization of newly-discovered materials and interfacial processes for specific applications. Our journal has experienced remarkable growth since its establishment in 2009, both in terms of the number of articles published and the impact of the research showcased. We are proud to foster a truly global community, with the majority of published articles originating from outside the United States, reflecting the rapid growth of applied research worldwide.