Heterogeneous Electric Double Layer with Ion‐Transport Pathways for Practical Zinc‐Ion Batteries

IF 29.1 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Advanced Materials Pub Date : 2026-10-09 DOI:10.1002/adma.75267

Siqi Qin, Mi Xu, Jingshuai Li, Chunyong Liang, Haozhen Dou, Zhongwei Chen

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引用次数: 0

Abstract

Manipulating the electric double layer (EDL) structure at nanoscale remains largely underexplored yet extremely challenging for practical Ah‐level aqueous zinc‐ion batteries (AZIBs). Here, we construct a heterogeneous nanostructured EDL with intrinsic ion‐transport pathways via cation‐anion coordination strategy, which synergistically enhances the thermodynamic stability and kinetic reversibility of the Zn anode. In‐situ characterizations and theoretical simulations demonstrate that the long‐chain ionic additive triggers the interfacial ion rearrangement and assembly within the EDL, where hydrophobic carbon chains self‐aggregate into dense apolar nanodomains, and cationic groups electrostatically attract anions and co‐assemble to form interconnected polar nanodomains. This uniquely heterogeneous EDL thermodynamically confines H 2 O activity and efficiently inhibits side reactions. Meanwhile, the interconnected polar ion‐transport pathways accelerate Zn 2+ migration and desolvation kinetics, achieving an ultrahigh Zn 2+ transference number (0.89) and dendrite‐free Zn deposition. Consequently, Zn//Zn cell delivers stable cycling over 1,200 h (25 mA cm −2 , 12.5 mAh cm −2 ) and Zn//NVO full cell retains 100% capacity after 30,000 cycles at 5 A g −1 . Furthermore, 0.2‐Ah and 1.1‐Ah pouch cells exhibit stable operation for 2,500 and 257 cycles, respectively. This work establishes a new paradigm for EDL nanostructure engineering, advancing practical AZIBs.

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具有离子传输途径的非均质双电层锌离子电池

在纳米尺度上操纵双电层（EDL）结构仍未得到充分探索，但对于实际的Ah级水锌离子电池（azib）来说，这是极具挑战性的。在这里，我们通过正负离子配位策略构建了具有固有离子传输途径的非均相纳米结构EDL，这协同提高了Zn阳极的热力学稳定性和动力学可逆性。原位表征和理论模拟表明，长链离子添加剂触发了EDL内部的界面离子重排和组装，其中疏水碳链自聚集成致密的极性纳米畴，阳离子基静电吸引阴离子并共组装形成相互连接的极性纳米畴。这种独特的多相EDL在热力学上限制了h2o的活性，并有效地抑制了副反应。同时，相互连接的极性离子传输途径加速了zn2 +迁移和脱溶动力学，实现了超高的zn2 +转移数（0.89）和无枝晶Zn沉积。因此，Zn//Zn电池提供超过1200小时（25 mA cm - 2, 12.5 mAh cm - 2）的稳定循环，Zn//NVO电池在5 A g - 1下循环30,000次后保持100%的容量。此外，0.2 - Ah和1.1 - Ah的袋状电池分别表现出2500和257次循环的稳定运行。这项工作为EDL纳米结构工程建立了一个新的范例，促进了azib的实用化。

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

Advanced Materials 工程技术-材料科学：综合

CiteScore

43.00

自引率

4.10%

发文量

2182

审稿时长

2 months

期刊介绍： Advanced Materials, one of the world's most prestigious journals and the foundation of the Advanced portfolio, is the home of choice for best-in-class materials science for more than 30 years. Following this fast-growing and interdisciplinary field, we are considering and publishing the most important discoveries on any and all materials from materials scientists, chemists, physicists, engineers as well as health and life scientists and bringing you the latest results and trends in modern materials-related research every week.