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首页> 外文OA文献 >Thermophysical and Electrochemical Properties of Ethereal Functionalised Cyclic Alkylammonium-based Ionic Liquids as Potential Electrolytes for Electrochemical Applications
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Thermophysical and Electrochemical Properties of Ethereal Functionalised Cyclic Alkylammonium-based Ionic Liquids as Potential Electrolytes for Electrochemical Applications

机译：醚类官能化环状烷基铵离子液体作为电化学应用的潜在电解质的热物理和电化学性质

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摘要

A series of hydrophobic room temperature ionic liquids (ILs) based on ethereal functionalised pyrrolidinium, piperidinium and azepanium cations bearing the bis{(trifluoromethyl)sulfonyl}imide, [TFSI]-, anion were synthesized and characterized. Their physicochemical properties such as density, viscosity and electrical conductivity and thermal properties including phase transitionbehaviour and decomposition temperature have been measured. All of the ILs showed low melting point, low viscosity and good conductivity and the latter properties have been discussed in terms of the IL fragility, an important electrolyte feature of the transport properties of glassy-forming ILs. Furthermore, the studied [TFSI]-- based ILs generally exhibit good electrochemical stabilities and, by coupling electrochemical experiments and DFT calculations, the effect of ether functionalisation at the IL cation on the electrochemical stability of the IL is discussed. Preliminary investigations into the Liredox chemistry at a Cu working electrode are also reported as a function of ether-functionality within the pyrrolidinium-based IL family. Overall, the results show that these ionic liquids are suitable for electrochemical devices such as battery systems, fuel cells or supercapacitors.
机译：合成并表征了一系列基于醚官能化吡咯烷鎓，哌啶鎓和氮杂鎓阳离子并带有双{（三氟甲基）磺酰基}酰亚胺，[TFSI]-阴离子的疏水性室温离子液体（ILs）。已经测量了它们的物理化学性质，例如密度，粘度和电导率，以及包括相变行为和分解温度在内的热性质。所有ILs均显示出低熔点，低粘度和良好的电导率，并且已根据IL脆性讨论了后者的性能，IL易碎性是玻璃状ILs传输特性的重要电解质特征。此外，所研究的基于[TFSI]-的ILs通常表现出良好的电化学稳定性，并且通过电化学实验和DFT计算的耦合，讨论了IL阳离子上醚官能化对IL电化学稳定性的影响。还报道了在铜工作电极上对Liredox化学的初步研究，这是基于吡咯烷鎓的IL系列中醚功能的函数。总体而言，结果表明这些离子液体适用于电化学设备，例如电池系统，燃料电池或超级电容器。

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