Yue Wu, Ce Wang, Chengjie Wang, Yan Zhang, Jingbing Liu, Yuhong Jin, Hao Wang and Qianqian Zhang
{"title":"Recent progress in SEI engineering for boosting Li metal anodes","authors":"Yue Wu, Ce Wang, Chengjie Wang, Yan Zhang, Jingbing Liu, Yuhong Jin, Hao Wang and Qianqian Zhang","doi":"10.1039/D3MH01434G","DOIUrl":null,"url":null,"abstract":"<p >Lithium metal anodes (LMAs) are ideal anode candidates for achieving next-generation high-energy-density battery systems due to their high theoretical capacity (3680 mA h g<small><sup>−1</sup></small>) and low working potential (−3.04 V <em>versus</em> the standard hydrogen electrode). However, the non-ideal solid electrolyte interface (SEI) derived from electrolyte/electrode interfacial reactions plays a vital role in the lithium deposition/stripping process and battery cycling performance. The composition and morphology of a SEI, which is sensitive to the outside environment, make it difficult to characterize and understand. With the development of characterization techniques, the mechanism, composition, and structure of a SEI can be better understood. In this review, the mechanism formation, the structure model evolution, and the composition of a SEI are briefly presented. Moreover, the development of <em>in situ</em> characterization techniques in recent years is introduced to better understand a SEI followed by the properties of the SEI, which are beneficial to the battery performance. Furthermore, recent optimization strategies of the SEI including the improvement of intrinsic SEIs and construction of artificial SEIs are summarized. Finally, the current challenges and future perspectives of SEI research are summarized.</p>","PeriodicalId":87,"journal":{"name":"Materials Horizons","volume":" 2","pages":" 388-407"},"PeriodicalIF":12.2000,"publicationDate":"2023-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Materials Horizons","FirstCategoryId":"88","ListUrlMain":"https://pubs.rsc.org/en/content/articlelanding/2024/mh/d3mh01434g","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
Lithium metal anodes (LMAs) are ideal anode candidates for achieving next-generation high-energy-density battery systems due to their high theoretical capacity (3680 mA h g−1) and low working potential (−3.04 V versus the standard hydrogen electrode). However, the non-ideal solid electrolyte interface (SEI) derived from electrolyte/electrode interfacial reactions plays a vital role in the lithium deposition/stripping process and battery cycling performance. The composition and morphology of a SEI, which is sensitive to the outside environment, make it difficult to characterize and understand. With the development of characterization techniques, the mechanism, composition, and structure of a SEI can be better understood. In this review, the mechanism formation, the structure model evolution, and the composition of a SEI are briefly presented. Moreover, the development of in situ characterization techniques in recent years is introduced to better understand a SEI followed by the properties of the SEI, which are beneficial to the battery performance. Furthermore, recent optimization strategies of the SEI including the improvement of intrinsic SEIs and construction of artificial SEIs are summarized. Finally, the current challenges and future perspectives of SEI research are summarized.
锂金属阳极(LMA)具有理论容量高(3680 mA h g-1)、工作电位低(与标准氢电极相比为-3.04 V)的特点,是实现下一代高能量密度电池系统的理想阳极候选材料。然而,电解质/电极界面反应产生的非理想固态电解质界面(SEI)在锂沉积/剥离过程和电池循环性能中起着至关重要的作用。SEI 的组成和形态对外界环境非常敏感,因此很难对其进行表征和理解。随着表征技术的发展,人们可以更好地了解 SEI 的机理、组成和结构。本综述简要介绍了 SEI 的机理形成、结构模型演变和组成。此外,还介绍了近年来原位表征技术的发展情况,以便更好地理解 SEI,随后介绍了 SEI 的特性,这些特性对电池性能大有裨益。此外,还总结了 SEI 的最新优化策略,包括改进固有 SEI 和构建人工 SEI。最后,总结了 SEI 研究目前面临的挑战和未来展望。