A Bidirectional Ion Kinetic Regulator Suppressing Lithium Dendrites in Advanced Lithium-Sulfur Batteries

IF 16.1 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Angewandte Chemie International Edition Pub Date : 2025-06-03 DOI:10.1002/anie.202504398

Jun Jiang, Yanwen Ding, Shujun Liu, Zhijie Qi, Tong Guo, Zhihua Wang, Jingwen Sun, He Zhu, Xiaoping Ouyang, Xin Wang, Junwu Zhu, YONGSHENG FU

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引用次数: 0

Abstract

Liquid organic electrolytes (LOEs) are of crucial significance in secondary battery deposition processes. Based on Sand's time formula, this study proposes a novel bidirectional ion kinetic regulator concept. Verified in lithium-sulfur batteries (LSBs), it is demonstrated that regulating the migration of anions and cations simultaneously can effectively promote the realization of dendrite-free batteries. This bidirectional ion kinetic regulator forms octahedral complexes with TFSI-, decreasing TFSI- migration, enhancing Li+ desolvation and diffusion, and thus extending the dendrite formation time by over 25 times. Moreover, the attraction of the regulator towards solvent molecules and its improvement on the sulfur reduction kinetics effectively suppress the shuttle effect. Subsequently, the assembled Li||Li (1 mA cm-2 for 2000 h), Li-Cu (99.4% of CE), and Li-S (1000 cycle at 4 C) cells deliver extremely excellent cycling stability. An Ah-level Li-S pouch cells also exhibit negligible capacity decay (50 cycles without capacity decay). This confirms the importance of regulating both anions and cations for high-safety LSBs.

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抑制先进锂硫电池中锂枝晶的双向离子动力学调节器

液态有机电解质（LOEs）在二次电池沉积过程中具有重要意义。本研究在Sand时间公式的基础上，提出了一种新的双向离子动力学调节器概念。锂硫电池（LSBs）验证表明，同时调节阴离子和阳离子的迁移可以有效促进无枝晶电池的实现。该双向离子动力学调节剂与TFSI-形成八面体配合物，减少TFSI-迁移，增强Li+的脱溶和扩散，从而使枝晶形成时间延长25倍以上。此外，调节剂对溶剂分子的吸引力及其对硫还原动力学的改善有效地抑制了穿梭效应。随后，组装的Li||Li (1 mA cm-2, 2000 h), Li- cu （99.4% CE）和Li- s（1000循环，4℃）电池提供了极好的循环稳定性。ah级锂电池也表现出可忽略不计的容量衰减（50次循环无容量衰减）。这证实了调节阴离子和阳离子对于高安全性lsdb的重要性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Angewandte Chemie International Edition 化学-化学综合

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.