{"title":"Advanced preparation and application of bimetallic materials in lithium-sulfur batteries: A review","authors":"Yongbing Jin, Nanping Deng, Yanan Li, Hao Wang, Meiling Zhang, Weimin Kang, Bowen Cheng","doi":"10.1016/j.jechem.2023.09.031","DOIUrl":null,"url":null,"abstract":"<div><p>Lithium-sulfur (Li-S) batteries are considered highly promising as next-generation energy storage systems due to high theoretical capacity (2600 W h kg<sup>−1</sup>) and energy density (1675 mA h g<sup>−1</sup>) as well as the abundant natural reserves, low cost of elemental sulfur, and environmentally friendly properties. However, several challenges impede its commercialization including low conductivity of sulfur itself, the severe “shuttle effect” caused by lithium polysulfides (LiPSs) during charge–discharge processes, volume expansion effects and sluggish reaction kinetics. As a solution, polar metal particles and their compounds have been introduced as the main hosts for sulfur cathode due to their robust catalytic activity and adsorption capability, effectively suppressing the “shuttle effect” of LiPSs. Bimetallic alloys and their compounds with multi-functional properties exhibit remarkable electrochemical performance more readily when compared to single-metal materials. Well-designed bimetallic materials demonstrate larger specific surface areas and richer active sites, enabling simultaneous high adsorption capability and strong catalytic properties. The synergistic effect of the “adsorption-catalysis” sites accelerates the adsorption-diffusion-conversion process of LiPSs, ultimately achieving a long-lasting Li-S battery. Herein, the latest progress and performance of bimetallic materials in cathodes, separators, and interlayers of Li-S batteries are systematically reviewed. Firstly, the principles and challenges of Li-S batteries are briefly analyzed. Then, various mechanisms for suppressing “shuttle effects” of LiPSs are emphasized at the microscale. Subsequently, the performance parameters of various bimetallic materials are comprehensively summarized, and some improvement strategies are proposed based on these findings. Finally, the future prospects of bimetallic materials are discussed, with the hope of providing profound insights for the rational design and manufacturing of high-performance bimetallic materials for LSBs.</p></div>","PeriodicalId":67498,"journal":{"name":"能源化学","volume":"88 ","pages":"Pages 469-512"},"PeriodicalIF":14.0000,"publicationDate":"2023-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"能源化学","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2095495623005478","RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, APPLIED","Score":null,"Total":0}
引用次数: 0
Abstract
Lithium-sulfur (Li-S) batteries are considered highly promising as next-generation energy storage systems due to high theoretical capacity (2600 W h kg−1) and energy density (1675 mA h g−1) as well as the abundant natural reserves, low cost of elemental sulfur, and environmentally friendly properties. However, several challenges impede its commercialization including low conductivity of sulfur itself, the severe “shuttle effect” caused by lithium polysulfides (LiPSs) during charge–discharge processes, volume expansion effects and sluggish reaction kinetics. As a solution, polar metal particles and their compounds have been introduced as the main hosts for sulfur cathode due to their robust catalytic activity and adsorption capability, effectively suppressing the “shuttle effect” of LiPSs. Bimetallic alloys and their compounds with multi-functional properties exhibit remarkable electrochemical performance more readily when compared to single-metal materials. Well-designed bimetallic materials demonstrate larger specific surface areas and richer active sites, enabling simultaneous high adsorption capability and strong catalytic properties. The synergistic effect of the “adsorption-catalysis” sites accelerates the adsorption-diffusion-conversion process of LiPSs, ultimately achieving a long-lasting Li-S battery. Herein, the latest progress and performance of bimetallic materials in cathodes, separators, and interlayers of Li-S batteries are systematically reviewed. Firstly, the principles and challenges of Li-S batteries are briefly analyzed. Then, various mechanisms for suppressing “shuttle effects” of LiPSs are emphasized at the microscale. Subsequently, the performance parameters of various bimetallic materials are comprehensively summarized, and some improvement strategies are proposed based on these findings. Finally, the future prospects of bimetallic materials are discussed, with the hope of providing profound insights for the rational design and manufacturing of high-performance bimetallic materials for LSBs.
锂硫(Li-S)电池由于其高理论容量(2600 W h kg−1)和能量密度(1675 mA h g−1)、丰富的自然储量、低成本的单质硫和环保特性,被认为是下一代储能系统的极具前景。然而,一些挑战阻碍了其商业化,包括硫本身的低电导率,锂多硫化物(LiPSs)在充放电过程中引起的严重“穿梭效应”,体积膨胀效应和反应动力学缓慢。作为一种解决方案,极性金属颗粒及其化合物由于其强大的催化活性和吸附能力而被引入作为硫阴极的主要宿主,有效地抑制了LiPSs的“穿梭效应”。与单金属材料相比,具有多功能特性的双金属合金及其化合物更容易表现出优异的电化学性能。设计良好的双金属材料具有更大的比表面积和更丰富的活性位点,同时具有高的吸附能力和强的催化性能。“吸附-催化”位点的协同效应加速了lips的吸附-扩散-转化过程,最终实现了锂硫电池的长效化。本文系统综述了双金属材料在锂离子电池阴极、隔膜和中间层中的最新研究进展和性能。首先,简要分析了Li-S电池的原理和面临的挑战。然后,在微观尺度上强调了抑制LiPSs“穿梭效应”的各种机制。随后,对各种双金属材料的性能参数进行了综合总结,并在此基础上提出了一些改进策略。最后,对双金属材料的未来发展前景进行了展望,希望能为LSBs高性能双金属材料的合理设计和制造提供深刻的见解。