Nano-Micro Letters ( IF 31.6 ) Pub Date : 2022-03-25 , DOI: 10.1007/s40820-022-00825-5 Wenshuo Shang 1 , Qiang Li 2 , Fuyi Jiang 1 , Bingkun Huang 1 , Jisheng Song 1 , Shan Yun 3 , Xuan Liu 1 , Hideo Kimura 1 , Jianjun Liu 2 , Litao Kang 1
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Highlights
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High-performance Zn||I2 batteries were established by coating zeolite protecting layers.
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The Zn2+-conductive layer suppresses I3− shuttling, Zn corrosion/dendrite growth.
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The Zeolite-Zn||I2 batteries achieve long lifespan (91.92% capacity retention after 5600 cycles), high coulombic efficiencies (99.76% in average) and large capacity (203–196 mAh g−1 at 0.2 A g−1) simultaneously.
Abstract
The intrinsically safe Zn||I2 battery, one of the leading candidates aiming to replace traditional Pb-acid batteries, is still seriously suffering from short shelf and cycling lifespan, due to the uncontrolled I3−-shuttling and dynamic parasitic reactions on Zn anodes. Considering the fact that almost all these detrimental processes terminate on the surfaces of Zn anodes, modifying Zn anodes’ surface with protecting layers should be one of the most straightforward and thorough approaches to restrain these processes. Herein, a facile zeolite-based cation-exchange protecting layer is designed to comprehensively suppress the unfavored parasitic reactions on the Zn anodes. The negatively-charged cavities in the zeolite lattice provide highly accessible migration channels for Zn2+, while blocking anions and electrolyte from passing through. This low-cost cation-exchange protecting layer can simultaneously suppress self-discharge, anode corrosion/passivation, and Zn dendrite growth, awarding the Zn||I2 batteries with ultra-long cycle life (91.92% capacity retention after 5600 cycles at 2 A g−1), high coulombic efficiencies (99.76% in average) and large capacity (203–196 mAh g−1 at 0.2 A g−1). This work provides a highly affordable approach for the construction of high-performance Zn-I2 aqueous batteries.
中文翻译：
通过涂覆基于沸石的阳离子交换保护层提高 Zn||I2 电池的性能
强调
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通过涂覆沸石保护层建立了高性能 Zn||I 2电池。
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Zn 2+导电层抑制I 3 -穿梭、Zn腐蚀/枝晶生长。
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Zeolite-Zn||I 2电池同时实现长寿命（5600 次循环后容量保持率为 91.92%）、高库仑效率（平均 99.76%）和大容量（203–196 mAh g −1在 0.2 A g −1时） .
抽象的
本质安全的 Zn||I 2电池是旨在取代传统铅酸电池的主要候选电池之一，但由于不受控制的 I 3 --Zn 阳极上的穿梭和动态寄生反应。考虑到几乎所有这些有害过程都在锌阳极表面终止，用保护层修饰锌阳极表面应该是抑制这些过程最直接、最彻底的方法之一。在此，设计了一种简便的基于沸石的阳离子交换保护层，以全面抑制锌阳极上不利的寄生反应。沸石晶格中带负电的空腔为 Zn 2+提供了高度可及的迁移通道，同时阻止阴离子和电解质通过。这种低成本的阳离子交换保护层可以同时抑制自放电、阳极腐蚀/钝化和锌枝晶生长，赋予 Zn||I 2具有超长循环寿命（在 2 A g −1下 5600 次循环后容量保持率为 91.92%）、高库仑效率（平均 99.76%）和大容量（203–196 mAh g −1在 0.2 A g −1下）的电池. 这项工作为构建高性能 Zn-I 2水系电池提供了一种经济实惠的方法。
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