{"title":"Achieving Ultra-Long Cycle Life of Zn Anode Using ZnSn(OH)<sub>6</sub> Coating Layer via Desolvation Effect and Uniform Zn<sup>2+</sup> Flux.","authors":"Yanhong Meng, Xinyu Bai, Hongming Chen, Busheng Zhang, Zijin Liu, Xinbo He, Dan Zhou","doi":"10.1002/smll.202405379","DOIUrl":null,"url":null,"abstract":"<p><p>Aqueous zinc-ion batteries (AZIBs) are considered as a promising energy storage system because of good safety, low cost, abundant resources, and environmental friendliness. However, the bottlenecks including dendrite growth, hydrogen evolution, and corrosion seriously limit their practical application. Herein, a novel ZnSn(OH)<sub>6</sub> coating layer with rich hydroxyl groups is employed to achieve highly stable Zn anode. The hydroxyl groups can feasibly interact with H<sub>2</sub>O molecules, contributing to the desolvation of hydrated Zn<sup>2+</sup> and the inhibition of side reactions on Zn anode surface. Furthermore, according to the DFT calculation, the adsorption energy of Zn<sup>2+</sup> among various sites on the surface of ZnSn(OH)<sub>6</sub> coating layer is relatively large, which helps the uniform distribution of Zn<sup>2+</sup> flux and the prevention of dendrite growth. Consequently, the ZnSn(OH)<sub>6</sub>@Zn anode delivers ultra-long cycle life (6770 h), low polarization voltage (27 mV), and high Coulombic efficiency (99.2% over 800 cycles) at 1 mA cm<sup>-2</sup>, 1 mAh cm<sup>-2</sup>. Besides, the assembled NaV<sub>3</sub>O<sub>8</sub>·xH<sub>2</sub>O//ZnSn(OH)<sub>6</sub>@Zn full cell can operate stably for 1500 cycles at 2 A g<sup>-1</sup> with a high specific capacity of 144.9 mAh g<sup>-1</sup>, demonstrating an excellent application potential. This simple and effective coating layer with high electrochemical performance provides an appealing strategy for the development of rechargeable AZIBs.</p>","PeriodicalId":228,"journal":{"name":"Small","volume":null,"pages":null},"PeriodicalIF":13.0000,"publicationDate":"2024-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Small","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1002/smll.202405379","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
Aqueous zinc-ion batteries (AZIBs) are considered as a promising energy storage system because of good safety, low cost, abundant resources, and environmental friendliness. However, the bottlenecks including dendrite growth, hydrogen evolution, and corrosion seriously limit their practical application. Herein, a novel ZnSn(OH)6 coating layer with rich hydroxyl groups is employed to achieve highly stable Zn anode. The hydroxyl groups can feasibly interact with H2O molecules, contributing to the desolvation of hydrated Zn2+ and the inhibition of side reactions on Zn anode surface. Furthermore, according to the DFT calculation, the adsorption energy of Zn2+ among various sites on the surface of ZnSn(OH)6 coating layer is relatively large, which helps the uniform distribution of Zn2+ flux and the prevention of dendrite growth. Consequently, the ZnSn(OH)6@Zn anode delivers ultra-long cycle life (6770 h), low polarization voltage (27 mV), and high Coulombic efficiency (99.2% over 800 cycles) at 1 mA cm-2, 1 mAh cm-2. Besides, the assembled NaV3O8·xH2O//ZnSn(OH)6@Zn full cell can operate stably for 1500 cycles at 2 A g-1 with a high specific capacity of 144.9 mAh g-1, demonstrating an excellent application potential. This simple and effective coating layer with high electrochemical performance provides an appealing strategy for the development of rechargeable AZIBs.
期刊介绍:
Small serves as an exceptional platform for both experimental and theoretical studies in fundamental and applied interdisciplinary research at the nano- and microscale. The journal offers a compelling mix of peer-reviewed Research Articles, Reviews, Perspectives, and Comments.
With a remarkable 2022 Journal Impact Factor of 13.3 (Journal Citation Reports from Clarivate Analytics, 2023), Small remains among the top multidisciplinary journals, covering a wide range of topics at the interface of materials science, chemistry, physics, engineering, medicine, and biology.
Small's readership includes biochemists, biologists, biomedical scientists, chemists, engineers, information technologists, materials scientists, physicists, and theoreticians alike.