An ether-functionalised cyclic sulfonium based ionic liquid as an electrolyte for electrochemical double layer capacitors
An ether-functionalised cyclic sulfonium based ionic liquid as an electrolyte for electrochemical double layer capacitors
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DOI：
10.1016/j.jpowsour.2016.06.085
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发表时间：
2016-09-15
影响因子：
9.2
通讯作者：
Jacquemin, Johan
中科院分区：
文献类型：
--
作者：
Neale, Alex R.;Murphy, Sinead;Jacquemin, Johan
合成了一种新型的带有醚基和双{（三氟甲基）磺酰基}酰亚胺阴离子的环状锍阳离子型离子液体（IL），并将其用于电化学双电层电容器（EDLC）测试。的合成和化学-物理表征的醚基含有IL平行报告与类似大小的烷基官能化的锍IL。的化学-物理测量的结果表明，如何重要的传输性能，即粘度和电导率，可以通过引入醚功能，而不妨碍热，化学或电化学稳定性的IL促进。尽管表观传输性质相对于烷基官能化类似物得到改善，但与基于有机溶剂（碳酸亚丙酯和乙腈）的传统EDLC电解质相比，醚官能化锍阳离子基IL表现出适度高的粘度和较差的电导率。使用活性炭复合电极进行醚官能化锍IL的电化学测试，以检查IL作为EDLC应用的无溶剂电解质的性能。在所研究的范围内实现了良好的循环稳定性，并且性能与其他无溶剂的IL基EDLC系统相当。然而，可达到的性能的限制主要是缓慢的传输性能和有限的工作电压的IL的结果，从而突出了这个领域的关键方面，需要进一步关注。(C)2016年6月，作者。由爱思唯尔公司出版
A novel cyclic sulfonium cation-based ionic liquid (IL) with an ether-group appendage and the bis {(trifluoromethyl)sulfonyl}imide anion was synthesised and developed for electrochemical double layer capacitor (EDLC) testing. The synthesis and chemical-physical characterisation of the ether-group containing IL is reported in parallel with a similarly sized alkyl-functionalised sulfonium IL. Results of the chemical-physical measurements demonstrate how important transport properties, i.e. viscosity and conductivity, can be promoted through the introduction of the ether-functionality without impeding thermal, chemical or electrochemical stability of the IL. Although the apparent transport properties are improved relative to the alkyl-functionalised analogue, the ether-functionalised sulfonium cation-based IL exhibits moderately high viscosity, and poorer conductivity, when compared to traditional EDLC electrolytes based on organic solvents (propylene carbonate and acetonitrile). Electrochemical testing of the ether-functionalised sulfonium IL was conducted using activated carbon composite electrodes to inspect the performance of the IL as a solvent-free electrolyte for EDLC application. Good cycling stability was achieved over the studied range and the performance was comparable to other solvent-free, IL-based EDLC systems. Nevertheless, limitations of the attainable performance are primarily the result of sluggish transport properties and a restricted operative voltage of the IL, thus highlighting key aspects of this field which require further attention. (C) 2016 The Authors. Published by Elsevier B.V.