Coordination electrochemistry taming reversible hypervalent bromine redox for energetic six-electron-transfer lithium-bromine battery.

IF 18.1 1区综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES

Nature Communications Pub Date : 2026-07-18 DOI:10.1038/s41467-026-75860-6

Rumeng Feng,Wenyu Xu,Hongwei Wang,Binfen Wang,Jialin Li,Zelin Chang,Zhaodong Huang,Ze Chen,Xinliang Li

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Abstract

Conversion-type static bromine batteries demonstrate promise in high output voltage and large capacity for rechargeable energy storage due to the inherent polyvalent reaction potential. Nevertheless, the combination of the limited two-electron 2Br-/Br2 redox couple and the redox-inactive organic ligands presents a fundamental bottleneck for the overall specific energy. Herein, ethyl viologen dibromide is developed as an energetically active positive electrode for organic lithium-bromine batteries by efficient coordination chemistry, featuring an advanced six-electron redox mechanism triggered by both intercalation and conversion reactions. The activated redox couple of 2Br-/2Br+ incubates a collaborative increase in capacity (632.8 mAh g-1Br) and discharge voltage (3.7 V). Besides, ethyl viologen undergoes reversible two-step intercalation and extraction of Li+ ions, contributing to additional energy storage. Reciprocal spectroscopic characterizations and computational electrochemistry indicate the chemisorption effect and interhalogen confinement and detail the dynamic mass-charge transfer pathway. This work sets a paradigm worth emulating for designing high-performance halogen batteries.

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六电子转移锂-溴电池可逆高价溴氧化还原配位电化学研究。

转换型静态溴电池由于其固有的多价反应电位，在高输出电压和大容量可充电储能方面具有广阔的应用前景。然而，有限的双电子2Br-/Br2氧化还原偶和氧化还原非活性有机配体的结合是总体比能的根本瓶颈。本文采用高效配位化学方法，开发了具有插层和转化反应触发的六电子氧化还原机制的有机锂-溴电池正极。2Br-/2Br+的活化氧化还原偶对协同增加容量（632.8 mAh g-1Br）和放电电压（3.7 V）。此外，紫紫乙酯经过可逆的两步插拔Li+离子，有助于额外的能量储存。互易光谱表征和计算电化学表明了化学吸附效应和卤素间约束，并详细描述了动态质量-电荷传递途径。这项工作为高性能卤素电池的设计提供了一个值得效仿的范例。

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

Nature Communications Biological Science Disciplines-

CiteScore

24.90

自引率

2.40%

发文量

6928

审稿时长

3.7 months

期刊介绍： Nature Communications, an open-access journal, publishes high-quality research spanning all areas of the natural sciences. Papers featured in the journal showcase significant advances relevant to specialists in each respective field. With a 2-year impact factor of 16.6 (2022) and a median time of 8 days from submission to the first editorial decision, Nature Communications is committed to rapid dissemination of research findings. As a multidisciplinary journal, it welcomes contributions from biological, health, physical, chemical, Earth, social, mathematical, applied, and engineering sciences, aiming to highlight important breakthroughs within each domain.