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Anti-Fatigue Hydrogel Electrolyte for All-Flexible Zn-Ion Batteries
Advanced Materials ( IF 27.4 ) Pub Date : 2023-05-26 , DOI: 10.1002/adma.202300498 Qun Liu 1 , Zhenlu Yu 1 , Qiuna Zhuang 2 , Jang-Kyo Kim 3, 4 , Feiyu Kang 5 , Biao Zhang 1
Advanced Materials ( IF 27.4 ) Pub Date : 2023-05-26 , DOI: 10.1002/adma.202300498 Qun Liu 1 , Zhenlu Yu 1 , Qiuna Zhuang 2 , Jang-Kyo Kim 3, 4 , Feiyu Kang 5 , Biao Zhang 1
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Hydrogel electrolytes are widely explored in Zn metal batteries for application in wearable electronics. While extensive studies have been conducted on optimizing the chemical structure and boosting the tensile elasticity, the mechanical stability of the hydrogel under repeated deformation is largely overlooked, leading to unsatisfactory performance at large cycling capacity. This work systematically analyzes the compressive fatigue-resistance properties of the hydrogel electrolyte, revealing the critical roles of the salt and copolymer matrix on crack initiation and propagation. It shows that, on the premise of homogeneous Zn deposition, an improved anti-fatigue property is essential to achieve high-capacity Zn metal anodes. The optimal Zn(ClO4)2-polyacrylamide/chitosan hydrogel electrolyte (C-PAMCS) exhibits an unprecedented lifespan of 1500 h for Zn//Zn cells at a current density of 10 mA cm−2 and a high areal capacity of 10 mAh cm−2. The potential application of C-PAMCS is exemplified in all-flexible Zn-ion batteries enabled by a flexible current collector consisting of a Ag nanowires embedded elastomer. This study provides the rationale under hydrogel electrolyte engineering toward advanced Zn-ion battereis and the application in flexible devices.
中文翻译：
全柔性锌离子电池抗疲劳水凝胶电解质
水凝胶电解质在锌金属电池中被广泛探索，用于可穿戴电子产品。虽然人们在优化化学结构和提高拉伸弹性方面进行了广泛的研究，但水凝胶在重复变形下的机械稳定性在很大程度上被忽视，导致在大循环容量下的性能不令人满意。这项工作系统地分析了水凝胶电解质的抗压缩疲劳性能，揭示了盐和共聚物基体对裂纹萌生和扩展的关键作用。这表明，在均匀锌沉积的前提下，提高抗疲劳性能对于实现高容量锌金属阳极至关重要。Zn//Zn电池的最佳Zn(ClO 4 ) 2 -聚丙烯酰胺/壳聚糖水凝胶电解质(C-PAMCS)在10 mA cm -2的电流密度和10 mAh的高面积容量下表现出前所未有的1500 h的寿命。厘米-2。C-PAMCS 的潜在应用在全柔性锌离子电池中得到了例证，该电池由嵌入银纳米线的弹性体组成的柔性集电器实现。这项研究为先进锌离子电池及其在柔性设备中的应用提供了水凝胶电解质工程的基本原理。
更新日期：2023-05-26
中文翻译：
全柔性锌离子电池抗疲劳水凝胶电解质
水凝胶电解质在锌金属电池中被广泛探索，用于可穿戴电子产品。虽然人们在优化化学结构和提高拉伸弹性方面进行了广泛的研究，但水凝胶在重复变形下的机械稳定性在很大程度上被忽视，导致在大循环容量下的性能不令人满意。这项工作系统地分析了水凝胶电解质的抗压缩疲劳性能，揭示了盐和共聚物基体对裂纹萌生和扩展的关键作用。这表明，在均匀锌沉积的前提下，提高抗疲劳性能对于实现高容量锌金属阳极至关重要。Zn//Zn电池的最佳Zn(ClO 4 ) 2 -聚丙烯酰胺/壳聚糖水凝胶电解质(C-PAMCS)在10 mA cm -2的电流密度和10 mAh的高面积容量下表现出前所未有的1500 h的寿命。厘米-2。C-PAMCS 的潜在应用在全柔性锌离子电池中得到了例证，该电池由嵌入银纳米线的弹性体组成的柔性集电器实现。这项研究为先进锌离子电池及其在柔性设备中的应用提供了水凝胶电解质工程的基本原理。
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