Withdrawal: Steering Sulfur Reduction Pathways via Cisplatin Enables High Performance in Lithium-Sulfur Batteries

IF 16.9 1区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY Angewandte Chemie International Edition Pub Date : 2024-05-31 DOI:10.1002/anie.202403618
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Abstract

Withdrawal: Q. Sun, X. Ren, C. Jiang, S. Ma, W. He, and L. Lu, “Steering Sulfur Reduction Pathways via Cisplatin Enables High Performance in Lithium-Sulfur Batteries,” Angewandte Chemie International Edition (Accepted Article): https://onlinelibrary.wiley.com/doi/abs/10.1002/anie.202403618.

The above article, published online on 31 May 2024 in Wiley Online Library (wileyonlinelibrary.com), has been withdrawn by agreement between the authors; the journal′s Executive Committee; and Wiley-VCH GmbH. The withdrawal has been agreed following an application for withdrawal from the authors who confirmed that the Raman patterns shown in Figures 3a and 3c could not be reproduced following further experimentation.

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通过顺铂引导硫还原途径,实现锂硫电池的高性能。
硫还原反应(SRR)是一种极具吸引力的 16 电子转移过程,可使锂-S 电池的理论容量达到 1,672 mAh g-1。然而,硫还原反应的缓慢动力学和复杂路径会导致可溶性多硫化物(PSs)的穿梭,从而导致容量快速衰减。在此,我们将顺铂(cis-Pt)作为一种新型介质来改善 SRR 动力学,并作为一种分子探针来确定 SRR 途径。我们的研究表明,具有还原性 Pt2+ 中心的顺式铂可直接切割 PS 的 S-S 键,从而增强电荷转移动力学、引导 SRR 途径以及 PS 向 Li2S 的深度转化。添加顺式铂后,锂-S 纽扣电池的最大比容量为 1,437 mAh g-1,1000 次循环后的容量衰减为每循环 0.017%,而具有实用电解质-硫比(2.5 μl mg-1)的袋式电池则表现出 318.8 Wh kg-1 的高能量密度。我们的机理研究表明,顺式铂通过生成具有氧化还原活性的顺式铂/聚苯硫醚复合物来引导阴极 SRR 通路,从而使 Pt4+/Pt2+ 对更快的氧化还原循环取代了缓慢的 SRR。这些发现为合理设计功能性介质以解决锂-S 电池的阴极难题提供了启示。
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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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