Approaches to, and Problems with, Ionic Liquid Electrolytes for Alkali Metal Electrochemical Devices: The Case of Low-Melting Chloroaluminate Binary Solutions
Approaches to, and Problems with, Ionic Liquid Electrolytes for Alkali Metal Electrochemical Devices: The Case of Low-Melting Chloroaluminate Binary Solutions
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用于碱金属电化学装置的离子液体电解质的方法和问题：以低熔点氯铝酸盐二元溶液为例
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
C. Angell
中科院分区：
文献类型：
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作者：
T. Tucker;C. Angell
尽管许多尝试使用具有溶解的锂盐的离子液体介质作为电化学电池的电解质组分，但仅取得有限的成功。尽管体积小，但Li+似乎是电解质中最慢的物质，因此电池会加速。随着钠电池越来越受到关注，所需的含Na+离子液体电解质可能会遇到类似但更严重的动力学问题。在这里，我们首先回顾过去的尝试，作为替代，无机盐和准盐的高电导率，其中电导率增加与碱含量。然后，我们提供了一个有机阳离子系统的详细研究，证实和扩展早期的工作由威尔克斯实验室，显示了相反的趋势如何适用于NaAlCl 4与离子液体乙基甲基咪唑四氯铝酸盐[EMI][AlCl 4]的混合物。在目前的工作中，抑郁症的Na+的情况下的导电性的充分特点，并讨论了在1983年的库仑场碱捕获的概念，低熔点的混合物。这本身就是早期熔盐静电和离子极化率模型的适应。综述了锂盐在无机准离子液体溶液中的明显例外现象，并考虑了回避钠离子导体所确定的问题的可能途径。© 2014电化学学会。[DOI：10.1149/2.0471412jes]版权所有。
Despite many attempts to use ionic liquid media with dissolved lithium salts as the electrolyte component of electrochemical cells, there has been only limited success. Despite its small size, Li+ seems to be the slowest species in the electrolyte, so the cells polarize. As sodium batteries gain attention, the needed Na+-containing ionic liquid electrolytes are likely to encounter similar, but more serious, kinetic problems. Here we first review past attempts to use, as an alternative, inorganic salts and quasi-salts of high conductivity, where conductivity increases with alkali content. Then we provide a detailed study of one organic cation system which confirms and extends earlier work by the Wilkes laboratory that showed how the opposite trend applied for mixtures of NaAlCl4 with the ionic liquid ethylmethylimidazolium tetrachloroaluminate [EMI][AlCl4]. In the present work the depression of conductivity for the Na+ case is fully characterized and is discussed in terms of a 1983 coulomb field alkali trapping concept for low-melting mixtures. This itself is an adaptation of earlier molten salt electrostatic and ionic polarizability models. The apparent exceptionalism of lithium salts in inorganic quasi-ionic liquid solutions is reviewed and possible ways of sidestepping the identified problems for sodium ion conductors are considered. © 2014 The Electrochemical Society. [DOI: 10.1149/2.0471412jes] All rights reserved.
影响因子：
3.9
作者：
Ye, Hui;Huang, Jian;Greenbaum, Steve G.
通讯作者：
Greenbaum, Steve G.