A perspective of ZnCl2 electrolytes: The physical and electrochemical properties
A perspective of ZnCl2 electrolytes: The physical and electrochemical properties
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DOI：
10.1016/j.esci.2021.10.004
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发表时间：
2021-12-01
期刊：
影响因子：
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通讯作者：
Ji, Xiulei
中科院分区：
文献类型：
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作者：
Ji, Xiulei
熔融的氯化锌水合物是室温下的离子液体，具有耐人寻味的物理和电化学性质。几十年来，人们一直致力于了解熔融的氯化锌水合物的性质，这些水合物最近被称为盐中水电解液。熔融的氯化锌水合物的物理性质可以从其形态中的离子和水分子的化学环境的角度来描述。近年来，熔融的水合氯化锌作为锌金属电池的电解液受到了人们的关注。结果表明，这类电解液的物理性质对其电化学性质有着丰富的影响。因此，需要对熔融的氯化锌水合物的物理和电化学性质进行全面的了解，才能设计出适用于高性能锌金属电池的功能电解液。这一观点试图回顾描述浓缩氯化锌作为离子液体和新兴电解液的性质的工作。作者还提出了一个观点，以突出未来研究的需要，以绕过这种电解液的限制。
Molten ZnCl2 hydrates are ionic liquids at room temperature, which exhibit intriguing physical and electrochemical properties. Continuous efforts have been devoted over several decades to understanding the properties of the molten ZnCl2 hydrates that have been dubbed as water-in-salt electrolytes recently. The physical properties of molten ZnCl2 hydrates can be described from the perspectives of ions in their speciation and water molecules regarding their chemical environments. Recently, attention has been given to molten ZnCl2 hydrates as electrolytes for Zn metal batteries. It was revealed that the physical properties of such electrolytes have rich implications in their electrochemical properties. Therefore, it demands a holistic understanding of the physical and electrochemical properties of molten ZnCl2 hydrates to design functional electrolytes to serve high-performing Zn metal batteries. This perspective attempts to review the works that described the properties of concentrated ZnCl2 as an ionic liquid and as an emerging electrolyte. The author also provides a perspective to highlight the needs of future research to circumvent the limits of this electrolyte.