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Effect of alkyl-chain length of imidazolium based ionic liquid on ion conducting and interfacial properties of organic electrolytes

机译:咪唑类离子液体的烷基链长对有机电解质的离子导电和界面性能的影响

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In this study the effect of imidazolium ionic liquid with a different alkyl side chain (ethyl, propyl and butyl) on ion conducting and interfacial properties of organic electrolytes against carbon electrode has been invested. The influence of electrochemical performances of imidazolium ionic liquids additives into organic solvent were examined by linear sweep voltammetry (LSV) cyclic voltammetry (CV), galvanostatic charge/discharge, and electrochemical impedance spectroscopy (EIS). The imidazolium ionic liquids with ethyl, propyl and butyl chains exhibited a variant electrochemical performance such an improved specific capacitance, low resistance, good rate capability and excellent cycle ability. Among the ionic liquids, BMImBF(4) (10 vol.%)-containing electrolyte presented the maximum specific capacitance (130.5 F g(-1)), capacitance retention (close to 80% after 1000 cycles) and low interfacial resistance of between electrolyte and electrode. It means that 10% BMImBF(4) in EC/DME (1/1) can be a proper electrolyte of capacitors. (C) 2014 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
机译:在这项研究中,已研究了具有不同烷基侧链(乙基,丙基和丁基)的咪唑鎓离子液体对有机电解质对碳电极的离子传导和界面性能的影响。通过线性扫描伏安法(LSV),循环伏安法(CV),恒电流充/放电和电化学阻抗谱(EIS),研究了咪唑离子液体添加剂对有机溶剂的电化学性能的影响。具有乙基,丙基和丁基链的咪唑鎓离子液体表现出不同的电化学性能,例如改善的比电容,低电阻,良好的倍率能力和出色的循环能力。在离子液体中,含BMImBF(4)(10%(体积))的电解质具有最大的比电容(130.5 F g(-1)),电容保持率(1000次循环后接近80%)和较低的介电常数。电解液和电极。这意味着EC / DME(1/1)中的10%BMImBF(4)可以作为电容器的合适电解质。 (C)2014韩国工业和工程化学学会。由Elsevier B.V.发布。保留所有权利。

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