锌碘电池中磺酸功能化的一石二鸟策略:碘限制器和均匀镀锌引导层

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中文摘要：锌碘水电池(Zn-I2)作为一种新兴的氧化还原转化储能系统以其低成本和高安全性引起了广泛的研究兴趣.然而,氧化还原转化不完全导致的多碘化物穿梭效应,以及锌阳极表面锌镀层的不均匀性,始终阻碍着锌碘电池的商业应用.本文报道了一种针对长寿命Zn-I2电池的"一石二鸟"策略.根据这一策略,磺酸功能化碳纤维不仅可以作为出色的碘限制器抑制碘物种的穿梭,还可以作为锌阳极表面的均匀镀锌引导层防止Zn2+的不均匀沉积.因此,这种电池具有出色的循环稳定性(在5 A g-1条件下循环10,000次后,容量为124 mAh g-1).理论计算表明,磺酸基团成功地诱导了碳基底上的电荷再分布,从而加强了碘物种与碳基底的电子相互作用.电荷富集的磺酸基团可通过与Zn2+的强烈库仑效应引导Zn2+均匀沉积.这项研究为可充电电池阴极和阳极的一体化设计提供了新的视角.

外文标题：Sulfonate-functionalization in Zn-iodine batteries as one stone kills two birds:iodine limiter and uniform Zn plating guidance layer

外文摘要：Aqueous Zn-iodine(Zn-I2)batteries have at-tracted extensive research interest as an emerging redox con-version energy storage system due to the low cost and high safety.However,the shuttling effects of polyiodides arising from incomplete redox conversion and inhomogeneous Zn plating on the Zn anode surface always hinder the commercial application of Zn-I2 batteries.In this work,a two-birds-with-one-stone strategy is reported for long-life Zn-I2 batteries.Based on the strategy,the sulfonate-fiinctionalized carbon fiber not only acts as the excellent iodine limiter to inhibit iodine species shuttling,but also as the uniform Zn plating guidance layer on the Zn anode surface to prevent the in-homogeneous deposition of Zn2+.Consequently,a superior cycling stability(a capacity of 124 mAh g-1 after 10,000 cycles at 5 A g-1)is achieved.Theoretical calculations illustrate that sulfonate groups successfully induce charge redistribution on the carbon substrate,thereby strengthening the electronic interactions of the iodine species with the carbon substrate.The charge-enriched sulfonate groups can guide the uniform deposition of Zn2+through a strong Coulombic effect with Zn2+.This work gives a new perspective on the integrated design of cathodes and anodes for rechargeable batteries.

外文关键词：

sulfonate-functionalizationiodine limiteruniform depositionZn plating guidance layerZn-iodine batteries

作者：

屈文涛、温晨玉、陈宝辉、蔡勇、张明

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作者单位：

Hunan Provincial Key Laboratory of Low-Dimensional Structural Physics & Devices,School of Physics and Electronics,Hunan University,Changsha 410082,China

Engineering Research Center of Advanced Semiconductor Technology and Application of Ministry of Education & Key Laboratory for Micro-/Nano-Optoelectronic Devices of Ministry of Education,College of Semiconductors(College of Integrated Circuits),Hunan University,Changsha 410082,China

College of Materials Science and Engineering,Hunan University,Changsha 410082,China

State Key Laboratory of Disaster Prevention & Reduction for Power Grid(Hunan Electric Power Corporation Disaster Prevention and Reduction Center),Changsha 410007,China

Changsha Semiconductor Technology and Application Innovation Research Insti

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关键词：

sulfonate-functionalization iodine limiter uniform deposition Zn plating guidance layer Zn-iodine batteries

基金：

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNatural Science Foundation of Hunan ProvinceScience and Technology Projects of the State Grid Corporation of China

项目编号：

51772082518041062023JJ100055500-202323102A-1-1-ZN

出版年：

2024

DOI：

10.1007/s40843-024-2971-y

中国科学:材料科学(英文)

CSTPCD

ISSN：

年,卷(期)：2024.67(9)