Two‐dimensional MXenes for lithium‐sulfur batteries
Two‐dimensional MXenes for lithium‐sulfur batteries
复制标题
DOI：
10.1002/inf2.12080
复制
发表时间：
2020-01
期刊：
影响因子：
22.7
通讯作者：
C. Zhang;Linfan Cui;Sina Abdolhosseinzadeh;J. Heier
中科院分区：
文献类型：
--
作者：
C. Zhang;Linfan Cui;Sina Abdolhosseinzadeh;J. Heier
锂硫二次电池(Li-S)因其高容量和高能量密度而引起了研究人员的广泛关注。然而，它们的商业应用仍然受到诸如可溶性硫化锂物种的穿梭效应、硫的绝缘性和电极快速容量衰减等挑战的阻碍。为了解决这些问题，人们致力于寻找更多具有丰富多硫化物化学吸附中心的导电主体，并对隔膜进行改性以物理/化学方式延缓多硫化物的迁移。二维过渡金属碳化物、碳氮化物和氮化物，即所谓的MXenes，由于其高导电性、层状结构以及丰富的表面端子，是限制多硫化物穿梭效应的理想材料。因此，MXenes在锂-S电池中得到了广泛的研究，主要集中在导电硫主体、多硫化物界面和隔膜方面。因此，在本文中，我们总结了多功能MXen基锂-S电池的设计方面的重要进展，并详细讨论了提高电化学性能的解决方案。此外，还概述了MXenes对锂-S电池的挑战和前景。
Rechargeable lithium-sulfur (Li-S) batteries have attracted significant research attention due to their high capacity and energy density. However, their com-mercial applications are still hindered by challenges such as the shuttle effect of soluble lithium sulfide species, the insulating nature of sulfur, and the fast capacity decay of the electrodes. Various efforts are devoted to address these problems through questing more conductive hosts with abundant polysulfide chemisorption sites, as well as modifying the separators to physically/chemi-cally retard the polysulfides migration. Two dimensional transition metal carbides, carbonitrides and nitrides, so-called MXenes, are ideal for confining the polysulfides shuttling effects due to their high conductivity, layered structure as well as rich surface terminations. As such, MXenes have thus been widely studied in Li-S batteries, focusing on the conductive sulfur hosts, polysulfides interfaces, and separators. Therefore, in this review, we summarize the significant progresses regarding the design of multifunctional MXene-based Li-S batteries and discuss the solutions for improving electrochemical performances in detail. In addition, challenges and perspectives of MXenes for Li-S batteries are also outlined.