Wentao Qu, Chenyu Wen, Baohui Chen, Yong Cai, Ming Zhang
{"title":"Sulfonate-functionalization in Zn-iodine batteries as one stone kills two birds: iodine limiter and uniform Zn plating guidance layer","authors":"Wentao Qu, Chenyu Wen, Baohui Chen, Yong Cai, Ming Zhang","doi":"10.1007/s40843-024-2971-y","DOIUrl":null,"url":null,"abstract":"<p>Aqueous Zn-iodine (Zn-I<sub>2</sub>) batteries have attracted extensive research interest as an emerging redox conversion 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-I<sub>2</sub> batteries. In this work, a two-birds-with-one-stone strategy is reported for long-life Zn-I<sub>2</sub> batteries. Based on the strategy, the sulfonate-functionalized 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 inhomogeneous deposition of Zn<sup>2+</sup>. Consequently, a superior cycling stability (a capacity of 124 mAh g<sup>−1</sup> after 10,000 cycles at 5 A g<sup>−1</sup>) 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 Zn<sup>2+</sup> through a strong Coulombic effect with Zn<sup>2+</sup>. This work gives a new perspective on the integrated design of cathodes and anodes for rechargeable batteries.\n</p>","PeriodicalId":773,"journal":{"name":"Science China Materials","volume":null,"pages":null},"PeriodicalIF":6.8000,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Science China Materials","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1007/s40843-024-2971-y","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
Aqueous Zn-iodine (Zn-I2) batteries have attracted extensive research interest as an emerging redox conversion 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-functionalized 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 inhomogeneous 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.
期刊介绍:
Science China Materials (SCM) is a globally peer-reviewed journal that covers all facets of materials science. It is supervised by the Chinese Academy of Sciences and co-sponsored by the Chinese Academy of Sciences and the National Natural Science Foundation of China. The journal is jointly published monthly in both printed and electronic forms by Science China Press and Springer. The aim of SCM is to encourage communication of high-quality, innovative research results at the cutting-edge interface of materials science with chemistry, physics, biology, and engineering. It focuses on breakthroughs from around the world and aims to become a world-leading academic journal for materials science.