{"title":"Failure mechanisms and remedy of an ultrathin Zn metal anode in pouch cells","authors":"","doi":"10.1016/j.joule.2024.07.013","DOIUrl":null,"url":null,"abstract":"<p>Zinc (Zn) metal anodes have attracted much attention for their use in aqueous Zn batteries. However, their electrochemical behavior and failure mechanisms under practical conditions remain unclear, and their cycling performance is far from the target for practical use. Here, we have developed a failure mechanism map of ultrathin Zn metal anodes in practical large (49 cm<sup>2</sup>) pouch cells and divided it into three zones, i.e., polarization, short-circuiting, and transition between the two. The correlation between failure mode and depth of discharge was revealed. Moreover, to improve the durability of large Zn anodes, a molecular interfacial layer was designed to produce compact epitaxial growth of Zn. Consequently, practical Zn||I<sub>2</sub> pouch cells with modified Zn anodes had a high capacity (∼1,200 mAh) and cycling stability (∼600 cycles), which is the record-stable Ah-level full cell reported so far. This work provides both fundamental and practical insights for accelerating the use of Zn batteries.</p>","PeriodicalId":343,"journal":{"name":"Joule","volume":null,"pages":null},"PeriodicalIF":38.6000,"publicationDate":"2024-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Joule","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1016/j.joule.2024.07.013","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
Zinc (Zn) metal anodes have attracted much attention for their use in aqueous Zn batteries. However, their electrochemical behavior and failure mechanisms under practical conditions remain unclear, and their cycling performance is far from the target for practical use. Here, we have developed a failure mechanism map of ultrathin Zn metal anodes in practical large (49 cm2) pouch cells and divided it into three zones, i.e., polarization, short-circuiting, and transition between the two. The correlation between failure mode and depth of discharge was revealed. Moreover, to improve the durability of large Zn anodes, a molecular interfacial layer was designed to produce compact epitaxial growth of Zn. Consequently, practical Zn||I2 pouch cells with modified Zn anodes had a high capacity (∼1,200 mAh) and cycling stability (∼600 cycles), which is the record-stable Ah-level full cell reported so far. This work provides both fundamental and practical insights for accelerating the use of Zn batteries.
期刊介绍：
Joule is a sister journal to Cell that focuses on research, analysis, and ideas related to sustainable energy. It aims to address the global challenge of the need for more sustainable energy solutions. Joule is a forward-looking journal that bridges disciplines and scales of energy research. It connects researchers and analysts working on scientific, technical, economic, policy, and social challenges related to sustainable energy. The journal covers a wide range of energy research, from fundamental laboratory studies on energy conversion and storage to global-level analysis. Joule aims to highlight and amplify the implications, challenges, and opportunities of novel energy research for different groups in the field.
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