Tailoring the growth of iron hexacyanoferrates for high-performance cathode of sodium-ion batteries

IF 5.8 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Journal of Alloys and Compounds Pub Date : 2023-06-15 DOI:10.1016/j.jallcom.2023.169284

Jingjing Xiang , Youchen Hao , Yuting Gao , Lei Ji , Li Wang , Guoxing Sun , Yuxin Tang , Yaofeng Zhu , Yinzhu Jiang

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引用次数: 1

Abstract

Iron hexacyanoferrate (FeHCF) is regarded as a promising cathode material of sodium-ion batteries (SIBs) due to the merits of easy preparation, low cost and three-dimensional open framework. However, the practical application of FeHCF is highly restricted by the intrinsic [Fe(CN)₆]^4- vacancy and coordinated water as well as nanoscale particles. Herein, sodium citrate is introduced to mediate the drawbacks of FeHCF, resulting in microscale particles with less water content. Accordingly, the modified sample, FeHCF-3, achieved the performance of 92 mA h g⁻¹ at 100 mA g⁻¹ and 80 % capacity retention after 300 cycles. Furthermore, an optimal iron hexacyanoferrate (FeHCF-H-2) with high-salt-concentration preparation is designed and performs a good reversibility of 96 mA h g⁻¹ after 700 cycles at 100 mA g⁻¹. Such strategy may drive the application of high-tap, low-defect and stable cathode for SIBs.

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用于高性能钠离子电池正极的六氰高铁的生长

六氰高铁酸铁(FeHCF)具有制备简单、成本低、三维开放结构等优点，被认为是一种很有前途的钠离子电池正极材料。然而，FeHCF的实际应用受到本征[Fe(CN)6]4-空位和配位水以及纳米级颗粒的高度限制。本文引入柠檬酸钠来弥补FeHCF的缺点，使其产生含水量较低的微尺度颗粒。因此，改性后的FeHCF-3在100 mA g - 1下的性能为92 mA h g - 1，循环300次后容量保持率为80%。此外，设计了一种最佳的高盐制备的六氰高铁酸铁(FeHCF-H-2)，在100 mA g - 1下循环700次后具有96 mA h g - 1的良好可逆性。这种策略将推动sib高抽头、低缺陷和稳定阴极的应用。

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

Journal of Alloys and Compounds 工程技术-材料科学：综合

CiteScore

11.10

自引率

14.50%

发文量

5146

审稿时长

67 days

期刊介绍： The Journal of Alloys and Compounds is intended to serve as an international medium for the publication of work on solid materials comprising compounds as well as alloys. Its great strength lies in the diversity of discipline which it encompasses, drawing together results from materials science, solid-state chemistry and physics.