{"title":"Engineering In Situ Heterometallic Layer for Robust Zn Electrochemistry in Extreme Zn(BF4)2 Electrolyte Environment","authors":"Mingcong Tang, Qun Liu, Xiaohong Zou, Zhenlu Yu, Kouer Zhang, Biao Zhang, Liang An","doi":"10.1016/j.ensm.2024.103896","DOIUrl":null,"url":null,"abstract":"The performance of zinc metal batteries is critically affected by the electrolyte environment originating from various zinc salt formulations. Zn(BF<sub>4</sub>)<sub>2</sub>, in particular, offers a notable cost advantage and its fluoride-containing groups facilitate the formation of a beneficial ZnF<sub>2</sub> interfacial layer, thereby making it a promising candidate for application. Nonetheless, the strong acidity of the Zn(BF<sub>4</sub>)<sub>2</sub>-based electrolyte exacerbates the dendrite formation and promotes parasitic reactions, leading to rapid battery failure. Herein, M(BF<sub>4</sub>)<sub>n</sub> (M: Cu, Sn, In) salts were adopted as additives in Zn(BF<sub>4</sub>)<sub>2</sub> electrolyte to in situ construct the heterometallic layers. Through comparison, the In(BF<sub>4</sub>)<sub>3</sub>-derived ZnIn interface demonstrates superior corrosion-resistance capability and the strongest zinc affinity, protecting the anode from acidic erosion and accelerating the Zn<sup>2+</sup> transportation kinetics. The symmetric cell with the optimized electrolyte exhibits a long lifespan of 2500 cycles while the full cell involving the polyaniline cathode also presents a high capacity retention of 81.3% after 1500 cycles, outperforming the cell with the original Zn(BF<sub>4</sub>)<sub>2</sub> electrolyte. The strategy of generating an interface layer within the battery through electrolyte additives can be readily applied to other metal battery technologies.","PeriodicalId":306,"journal":{"name":"Energy Storage Materials","volume":null,"pages":null},"PeriodicalIF":18.9000,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Energy Storage Materials","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1016/j.ensm.2024.103896","RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 0
Abstract
The performance of zinc metal batteries is critically affected by the electrolyte environment originating from various zinc salt formulations. Zn(BF4)2, in particular, offers a notable cost advantage and its fluoride-containing groups facilitate the formation of a beneficial ZnF2 interfacial layer, thereby making it a promising candidate for application. Nonetheless, the strong acidity of the Zn(BF4)2-based electrolyte exacerbates the dendrite formation and promotes parasitic reactions, leading to rapid battery failure. Herein, M(BF4)n (M: Cu, Sn, In) salts were adopted as additives in Zn(BF4)2 electrolyte to in situ construct the heterometallic layers. Through comparison, the In(BF4)3-derived ZnIn interface demonstrates superior corrosion-resistance capability and the strongest zinc affinity, protecting the anode from acidic erosion and accelerating the Zn2+ transportation kinetics. The symmetric cell with the optimized electrolyte exhibits a long lifespan of 2500 cycles while the full cell involving the polyaniline cathode also presents a high capacity retention of 81.3% after 1500 cycles, outperforming the cell with the original Zn(BF4)2 electrolyte. The strategy of generating an interface layer within the battery through electrolyte additives can be readily applied to other metal battery technologies.
期刊介绍:
Energy Storage Materials is a global interdisciplinary journal dedicated to sharing scientific and technological advancements in materials and devices for advanced energy storage and related energy conversion, such as in metal-O2 batteries. The journal features comprehensive research articles, including full papers and short communications, as well as authoritative feature articles and reviews by leading experts in the field.
Energy Storage Materials covers a wide range of topics, including the synthesis, fabrication, structure, properties, performance, and technological applications of energy storage materials. Additionally, the journal explores strategies, policies, and developments in the field of energy storage materials and devices for sustainable energy.
Published papers are selected based on their scientific and technological significance, their ability to provide valuable new knowledge, and their relevance to the international research community.