IF 16.1 1区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY
Zhibin Cheng, Yiyang Chen, Jie Lian, Xingli Chen, Shengchang Xiang, Banglin Chen, Zhangjing Zhang
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引用次数: 0

摘要

改性隔膜被认为是实现高性能锂硫(Li-S)电池的有效策略。然而,大多数改性层都过厚,催化活性位点主要位于材料内部。这种结构严重影响了 Li+ 的传输和多硫化物的高效催化转化。因此,迫切需要开发一种集超薄设计、催化活性和离子筛分功能于一体的多功能分离器。在此,我们成功地将 TCPP(Ni)作为辅助配体与 Zr-BTB 纳米片连接起来,创造出一种具有高效离子筛分和催化特性的超薄分离器改性层(Zr-TCPP(Ni))。由此产生的多功能分离器具有强大的离子筛分能力,可促进 Li+ 的快速传输并拦截多硫化物的穿梭。因此,Zr-TCPP(Ni)@PP 电池在 3 C 的高倍率条件下循环 400 次后,仍能保持 79.45% 的初始容量,同时,即使在 0.5 C 条件下硫含量高达 80 wt%,也能达到 4.55 mA h cm-2 的惊人平均容量。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Interface Engineering of MOF Nanosheets for Accelerated Redox Kinetics in Lithium‐Sulfur Batteries
Modifying the separator is considered as an effective strategy for achieving High performance lithium‐sulfur (Li‐S) batteries. However, most modification layers are excessively thick, with catalytic active sites primarily located within the material's interior. This configuration severely impacts Li+ transport and the efficient catalytic conversion of polysulfides. Therefore, there is an urgent need to develop a multifunctional separator that integrates ultrathin design, catalytic activity, and ion sieving capabilities. Herein, we successfully linked TCPP(Ni) as a secondary ligand with Zr‐BTB nanosheets to create an ultra‐thin separator modification layer (Zr‐TCPP(Ni)) with efficient ion sieving and catalytic properties. The resultant multifunctional separators provide robust ion sieving capabilities that promote rapid Li+ transport and intercept polysulfides shuttling. Therefore, The Zr‐TCPP(Ni)@PP cell maintains 79.45% of its initial capacity after 400 cycles at a high rate of 3 C, while achieving an impressive areal capacity of 4.55 mA h cm‐2 even with high sulfur content of 80 wt% at 0.5 C. This work provides valuable insights for rational design of MOF interface engineering in high energy density Li‐S batteries.
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来源期刊
CiteScore
26.60
自引率
6.60%
发文量
3549
审稿时长
1.5 months
期刊介绍: Angewandte Chemie, a journal of the German Chemical Society (GDCh), maintains a leading position among scholarly journals in general chemistry with an impressive Impact Factor of 16.6 (2022 Journal Citation Reports, Clarivate, 2023). Published weekly in a reader-friendly format, it features new articles almost every day. Established in 1887, Angewandte Chemie is a prominent chemistry journal, offering a dynamic blend of Review-type articles, Highlights, Communications, and Research Articles on a weekly basis, making it unique in the field.
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