Iminodiacetate Chelated Zinc Complex Electrolyte Enables High‐Voltage and Long‐Life Zinc‐Based Flow Batteries

IF 17.6 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Angewandte Chemie International Edition Pub Date : 2026-07-09 DOI:10.1002/anie.5514470

Shengwen Tan, Zhonghao Ren, Xiyu Yao, Rui Fang, Tian Xu, Guowang Diao, Yanrong Wang, Caixing Wang

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Abstract

Conventionally, lowering the Zn plating/stripping potential relies on strongly alkaline electrolytes that convert Zn 2+ into zincate species. However, such conditions often exacerbate Zn corrosion and severe dendrite growth. Here, we introduce an iminodiacetate (IDA 2− )‐based coordination strategy that enables reversible Zn plating/stripping under mildly alkaline conditions (pH ∼12). The hexacoordinated [Zn(IDA) 2 ] 2− shifts the Zn plating/stripping potential to −1.17 V versus SHE. A demonstrated zinc‐iodine flow battery delivers a voltage of ∼1.7 V with a peak power density of 561.5 mW cm −2 and sustains cycling over 700 cycles at 100 mA cm −2 with Zn areal capacity of 90 mAh cm −2 . This strategy is further validated in a zinc‐iron redox flow battery, achieving an operating voltage of ∼1.6 V with average Coulombic efficiency of 99.3% over 750 cycles. Collectively, these results suggest that the proposed coordination chemistry offers a promising avenue toward the development of high‐voltage long‐life zinc‐based redox flow batteries.

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亚氨基二乙酸螯合锌复合电解质可实现高电压和长寿命锌基液流电池

通常，降低锌电镀/剥离电位依赖于将zn2 +转化为锌酸盐的强碱性电解质。然而，这样的条件往往加剧锌的腐蚀和严重的枝晶生长。在这里，我们介绍了一种基于亚氨基二乙酸酯（IDA 2−）的配位策略，该策略可以在轻度碱性条件下（pH ~ 12）实现可逆的锌电镀/剥离。与SHE相比，六配位的[Zn(IDA) 2] 2−将Zn电镀/剥离电位移至−1.17 V。所演示的锌碘液流电池提供约1.7 V的电压，峰值功率密度为561.5 mW cm - 2，在100 mA cm - 2下持续循环超过700次，锌面积容量为90 mAh cm - 2。该策略在锌铁氧化还原液流电池中得到进一步验证，在750次循环中实现了约1.6 V的工作电压和99.3%的平均库仑效率。总的来说，这些结果表明，所提出的配位化学为开发高压长寿命锌基氧化还原液流电池提供了一条有希望的途径。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Angewandte Chemie International Edition 化学-化学综合

CiteScore

26.60

自引率

6.60%

发文量

3549

审稿时长

1.5 months

期刊介绍： Angewandte Chemie, a journal of the German Chemical Society (GDCh), maintains a leading position among scholarly journals in general chemistry with an impressive Impact Factor of 16.6 (2022 Journal Citation Reports, Clarivate, 2023). Published weekly in a reader-friendly format, it features new articles almost every day. Established in 1887, Angewandte Chemie is a prominent chemistry journal, offering a dynamic blend of Review-type articles, Highlights, Communications, and Research Articles on a weekly basis, making it unique in the field.